Cold email infrastructure providers, compared and scored
Eight providers, seven published criteria, every fact linked to the vendor's own page. Priced as a full setup: mailboxes, warmup and a sequencer at 25, 100 and 400 mailboxes.
- Warmup and sending included
- $2.50 a mailbox, 12 minimum
- Month-to-month billing
Top 5 of 8 · weighted score
- 1. Outreach2day9.1 / 10
- 2. Smartlead7.3 / 10
- 3. Zapmail7.1 / 10
- 4. Mailforge6.9 / 10
- 5. Instantly6.9 / 10
We are one of the vendors. The rules and every source are on this page.
The scores
Out of 10, weighted. Open a vendor for each score and its source.
| Vendor | Scoreout of 10 | Full-stack costweight 30% | Warmupweight 15% | Sequencerweight 15% | Mailbox typesweight 10% | Setupweight 10% | Monitoringweight 10% | API and exportweight 10% |
|---|---|---|---|---|---|---|---|---|
| 1. Outreach2dayMailboxes + warmup + sequencer | 9.1 | 10.0 | 10.0 | 10.0 | 4.0 | 10.0 | 6.7 | 10.0 |
| 2. SmartleadSequencer + mailboxes | 7.3 | 4.6 | 10.0 | 6.0 | 10.0 | 10.0 | 10.0 | 5.0 |
| 3. ZapmailMailboxes | 7.1 | 6.3 | 10.0 | 2.0 | 7.0 | 10.0 | 6.7 | 10.0 |
| 4. MailforgeMailboxes | 6.9 | 6.3 | 5.0 | 6.0 | 4.0 | 10.0 | 10.0 | 10.0 |
| 5. InstantlySequencer + mailboxes | 6.9 | 4.2 | 10.0 | 6.0 | 7.0 | 10.0 | 10.0 | 5.0 |
| 6. InboxKitMailboxes | 6.6 | 6.3 | 5.0 | 2.0 | 7.0 | 10.0 | 10.0 | 10.0 |
| 7. Premium InboxesMailboxes | 5.6 | 5.6 | 2.0 | 2.0 | 7.0 | 6.0 | 10.0 | 10.0 |
| 8. MaildosoMailboxes | 5.1 | 4.9 | 2.0 | 2.0 | 4.0 | 10.0 | 6.7 | 10.0 |
- 1. Outreach2dayMailboxes + warmup + sequencer9.1 / 10
- 2. SmartleadSequencer + mailboxes7.3 / 10
- 3. ZapmailMailboxes7.1 / 10
- 4. MailforgeMailboxes6.9 / 10
- 5. InstantlySequencer + mailboxes6.9 / 10
- 6. InboxKitMailboxes6.6 / 10
- 7. Premium InboxesMailboxes5.6 / 10
- 8. MaildosoMailboxes5.1 / 10
How we score
Seven criteria, each scored 0 to 10 by the rule in the table. The total is the weighted average.
Cost weighs most because setups differ most there: the monthly cost of 100 mailboxes with warmup and a sequencer, at list prices. A vendor that sells mailboxes only gets the cheapest Instantly plan for the volume, because you can't send without one.
We sell mailboxes, so we are in this table. The criteria favor a bundle like ours. We lose points for SMTP-only mailboxes and for no blacklist monitoring. If you already pay for a sequencer, read the mailbox price and mailbox type rows instead of the total.
| Criterion | Weight | How the score is set |
|---|---|---|
| Full-stack costMonthly cost of 100 mailboxes, warmup and a sequencer at list prices. The cheapest setup gets 10; the others get 10 × cheapest ÷ their cost. | 30% | Monthly cost of 100 mailboxes, warmup and a sequencer at list prices. The cheapest setup gets 10; the others get 10 × cheapest ÷ their cost. |
| Warmup10: included in the mailbox or plan price. 5: sold as a paid add-on. 2: not offered; you bring your own warmup tool. | 15% | 10: included in the mailbox or plan price. 5: sold as a paid add-on. 2: not offered; you bring your own warmup tool. |
| Sequencer10: mailboxes and a sequencer in one subscription. 6: the same vendor sells both, as two separate purchases. 2: mailboxes only; you pay for a sequencer elsewhere. | 15% | 10: mailboxes and a sequencer in one subscription. 6: the same vendor sells both, as two separate purchases. 2: mailboxes only; you pay for a sequencer elsewhere. |
| Mailbox types10: Google Workspace, Microsoft 365 and SMTP mailboxes. 7: two of the three. 4: one type. | 10% | 10: Google Workspace, Microsoft 365 and SMTP mailboxes. 7: two of the three. 4: one type. |
| Setup10: domains bought in the app and SPF, DKIM and DMARC set automatically. 6: DNS set automatically, domains bought elsewhere. 3: manual DNS. | 10% | 10: domains bought in the app and SPF, DKIM and DMARC set automatically. 6: DNS set automatically, domains bought elsewhere. 3: manual DNS. |
| MonitoringOne third of 10 for each of: inbox placement tests, blacklist checks, per-mailbox health or sending stats. A separate plan or add-on still counts. | 10% | One third of 10 for each of: inbox placement tests, blacklist checks, per-mailbox health or sending stats. A separate plan or add-on still counts. |
| API and export5 for a public API, 5 for a documented way to move or connect the mailboxes to other sending tools. | 10% | 5 for a public API, 5 for a documented way to move or connect the mailboxes to other sending tools. |
Every score and the fact behind it
Each line links to the vendor's public page we took the fact from.
Outreach2day9.1 / 10
Cold email mailboxes, warmup and its own sequencer with per-mailbox analytics in one $2.50 subscription.
- Full-stack cost
- 10.0
- $250 a month for 100 mailboxes with warmup and sending (100 mailboxes × $2.50, warmup and a sequencer included). source
- Monitoring
- 6.7
- Per-mailbox warmup inbox, spam and bounce rate, and Google and Outlook placement tests. No blacklist monitoring. source
- API and export
- 10.0
- REST API on every account; mailboxes sync to Instantly and Smartlead and export to 14 tools. source
Smartlead7.3 / 10
A cold email sending platform that resells Google, Outlook and SMTP mailboxes from partner providers as SmartSenders.
- Full-stack cost
- 4.6
- $544 a month for 100 mailboxes with warmup and sending (100 mailboxes × $4.50 + Smartlead Pro). source (opens the vendor's page in a new tab)
- Sequencer
- 6.0
- Smartlead sells both, as two purchases: a plan and SmartSenders mailboxes. source (opens the vendor's page in a new tab)
- Mailbox types
- 10.0
- Google, Outlook and SMTP mailboxes through SmartSenders. source (opens the vendor's page in a new tab)
- Setup
- 10.0
- Domains are bought in Smartlead; DNS, SPF and DKIM are handled. source (opens the vendor's page in a new tab)
- Monitoring
- 10.0
- Placement tests, blacklist checks and sender health trends (SmartDelivery, separate plan from $49 a month). source (opens the vendor's page in a new tab)
- API and export
- 5.0
- API on Pro and above. SmartSenders mailboxes can't be used outside Smartlead. source (opens the vendor's page in a new tab)
Zapmail7.1 / 10
Google Workspace and Microsoft 365 mailboxes with automated DNS, sold in plans of 10, 30 and 100. No sequencer.
- Full-stack cost
- 6.3
- $396 a month for 100 mailboxes with warmup and sending (Zapmail Pro (100 mailboxes) + Instantly Hypergrowth). source (opens the vendor's page in a new tab)
- Warmup
- 10.0
- Zapmail's FAQ says warmup is handled for you. source (opens the vendor's page in a new tab)
- Sequencer
- 2.0
- Mailboxes only; they export to 50+ outreach tools. source (opens the vendor's page in a new tab)
- Setup
- 10.0
- Domains are bought in Zapmail; SPF, DKIM and DMARC are set automatically. source (opens the vendor's page in a new tab)
- Monitoring
- 6.7
- Placement test credits on every plan, each with a blacklist check. We found no per-mailbox health stats on its pages. source (opens the vendor's page in a new tab)
- API and export
- 10.0
- API on the Pro plan; exports to 50+ tools. source (opens the vendor's page in a new tab)
Mailforge6.9 / 10
Shared-IP SMTP mailboxes billed per slot. Warmup (Warmforge) and sending (Salesforge) are separate Forge products.
- Full-stack cost
- 6.3
- $397 a month for 100 mailboxes with warmup and sending (Mailforge 100 slots + Instantly Hypergrowth). source (opens the vendor's page in a new tab)
- Warmup
- 5.0
- Warmup is Warmforge, a separate Forge product. source (opens the vendor's page in a new tab)
- Sequencer
- 6.0
- Sending is Salesforge, a separate Forge product. source (opens the vendor's page in a new tab)
- Mailbox types
- 4.0
- Mailforge sells SMTP; Google and Microsoft mailboxes are a separate product, Primeforge. source (opens the vendor's page in a new tab)
- Setup
- 10.0
- Domains are bought in Mailforge; SPF, DKIM and DMARC are set automatically. source (opens the vendor's page in a new tab)
- Monitoring
- 10.0
- Placement tests, blacklist checks and per-mailbox health, in Warmforge. source (opens the vendor's page in a new tab)
- API and export
- 10.0
- Public API; works with any sending tool. source (opens the vendor's page in a new tab)
Instantly6.9 / 10
A cold email sending platform that also sells done-for-you Google accounts, pre-warmed accounts and its own SMTP inboxes.
- Full-stack cost
- 4.2
- $597 a month for 100 mailboxes with warmup and sending (100 Google accounts × $5 + Instantly Hypergrowth). source (opens the vendor's page in a new tab)
- Sequencer
- 6.0
- Instantly sells both, as two purchases: an Outreach plan and accounts per month. source (opens the vendor's page in a new tab)
- Mailbox types
- 7.0
- Google accounts and AirMail SMTP inboxes; Microsoft only if you connect your own. source (opens the vendor's page in a new tab)
- Setup
- 10.0
- Domains are bought in Instantly; MX, SPF, DKIM and DMARC are set up for you. source (opens the vendor's page in a new tab)
- Monitoring
- 10.0
- Account analytics on every plan; placement tests and blacklist monitoring on a separate plan from $47 a month. source (opens the vendor's page in a new tab)
- API and export
- 5.0
- API on all plans. Done-for-you accounts can't be used outside Instantly. source (opens the vendor's page in a new tab)
InboxKit6.6 / 10
Google Workspace and Microsoft 365 mailboxes at a flat per-mailbox price, with warmup as an add-on. No sequencer.
- Full-stack cost
- 6.3
- $397 a month for 100 mailboxes with warmup and sending (100 mailboxes × $3.00 + Instantly Hypergrowth). source (opens the vendor's page in a new tab)
- Warmup
- 5.0
- Warmup is an add-on at $3 per mailbox a month. source (opens the vendor's page in a new tab)
- Setup
- 10.0
- Domains registered through InboxKit; SPF, DKIM and DMARC automated. source (opens the vendor's page in a new tab)
- Monitoring
- 10.0
- Per-mailbox analytics and alerts included; blacklist checks and placement tests in the InfraGuard add-on. source (opens the vendor's page in a new tab)
- API and export
- 10.0
- REST API with webhooks; 24+ integrations and app passwords. source (opens the vendor's page in a new tab)
Premium Inboxes5.6 / 10
Google Workspace and Microsoft 365 inboxes, set up for you and uploaded to your sequencer. It sells no sequencer of its own.
- Full-stack cost
- 5.6
- $447 a month for 100 mailboxes with warmup and sending (100 inboxes × $3.50 + Instantly Hypergrowth). source (opens the vendor's page in a new tab)
- Warmup
- 2.0
- Warmup runs in your own sequencer; Premium Inboxes switches it on during setup. source (opens the vendor's page in a new tab)
- Sequencer
- 2.0
- Inboxes only; they are uploaded to your sequencer. source (opens the vendor's page in a new tab)
- Setup
- 6.0
- DNS and SPF/DKIM/DMARC are done for you; the page contradicts itself on whether it sells domains. source (opens the vendor's page in a new tab)
- Monitoring
- 10.0
- Dashboard and health checks; 24-hour monitoring on the Insured tier; managed operations in Email Control Centre. source (opens the vendor's page in a new tab)
- API and export
- 10.0
- Client API on every plan; inboxes are uploaded to six sequencers. source (opens the vendor's page in a new tab)
Maildoso5.1 / 10
SMTP mailboxes on Maildoso's own servers and IPs, from a 30-mailbox plan. No warmup and no sequencer.
- Full-stack cost
- 4.9
- $514.5 a month for 100 mailboxes with warmup and sending (167 Maildoso mailboxes × $2.50 (the number needed at 15 a day) + Instantly Hypergrowth). source (opens the vendor's page in a new tab)
- Warmup
- 2.0
- Not included: Maildoso tells you to use outside providers or the Instantly warmup pool. source (opens the vendor's page in a new tab)
- Sequencer
- 2.0
- Mailboxes only; they sync to Instantly, Smartlead or EmailBison. source (opens the vendor's page in a new tab)
- Mailbox types
- 4.0
- One type: SMTP mailboxes on Maildoso's servers. source (opens the vendor's page in a new tab)
- Setup
- 10.0
- Domains are bought in Maildoso; SPF, DKIM and DMARC are set automatically. source (opens the vendor's page in a new tab)
- Monitoring
- 6.7
- Placement tests every 3 days and per-mailbox health scores. We found no blacklist monitoring on its pricing page. source (opens the vendor's page in a new tab)
- API and export
- 10.0
- REST API and MCP on every plan; sync to three sequencers and CSV export. source (opens the vendor's page in a new tab)
What the full setup costs each month
Mailboxes, warmup and a sequencer at 25, 100 and 400 mailboxes (550 cold emails per mailbox a month). Domains are not included.
| Setup | 25 mailboxes13,750 emails a month | 100 mailboxes55,000 emails a month | 400 mailboxes220,000 emails a month |
|---|---|---|---|
| Outreach2dayMailboxes + warmup + sequencer | $62.50 / molowest25 mailboxes × $2.50, warmup and a sequencer included $62.50 | $250 / molowest100 mailboxes × $2.50, warmup and a sequencer included $250 | $1,000 / molowest400 mailboxes × $2.50, warmup and a sequencer included $1,000 |
| InstantlySequencer + mailboxes | $222 / mo$159.50 more than Outreach2day25 Google accounts × $5 $125 + Instantly Hypergrowth $97 | $597 / mo$347 more than Outreach2day100 Google accounts × $5 $500 + Instantly Hypergrowth $97 | $2,184 / mo$1,184 more than Outreach2day400 Google accounts × $5 $2,000 + Instantly Hypergrowth + add-on $184 |
| SmartleadSequencer + mailboxes | $206.50 / mo$144 more than Outreach2day25 mailboxes × $4.50 $112.50 + Smartlead Pro $94 | $544 / mo$294 more than Outreach2day100 mailboxes × $4.50 $450 + Smartlead Pro $94 | $2,028 / mo$1,028 more than Outreach2day400 mailboxes × $4.50 $1,800 + Smartlead 240K sends $228 |
| MaildosoMailboxes | $202 / mo$139.50 more than Outreach2day42 Maildoso mailboxes × $2.50 (the number needed at 15 a day) $105 + Instantly Hypergrowth $97 | $514.50 / mo$264.50 more than Outreach2day167 Maildoso mailboxes × $2.50 (the number needed at 15 a day) $417.50 + Instantly Hypergrowth $97 | $1,851.50 / mo$851.50 more than Outreach2day667 Maildoso mailboxes × $2.50 (the number needed at 15 a day) $1,667.50 + Instantly Hypergrowth + add-on $184 |
| ZapmailMailboxes | $188.50 / mo$126 more than Outreach2dayZapmail Starter + 15 extra mailboxes $91.50 + Instantly Hypergrowth $97 | $396 / mo$146 more than Outreach2dayZapmail Pro (100 mailboxes) $299 + Instantly Hypergrowth $97 | $1,383 / mo$383 more than Outreach2dayZapmail Pro + 300 extra mailboxes $1,199 + Instantly Hypergrowth + add-on $184 |
| MailforgeMailboxes | $172 / mo$109.50 more than Outreach2dayMailforge 25 slots $75 + Instantly Hypergrowth $97 | $397 / mo$147 more than Outreach2dayMailforge 100 slots $300 + Instantly Hypergrowth $97 | $1,267 / mo$267 more than Outreach2dayMailforge 400 slots $1,083 + Instantly Hypergrowth + add-on $184 |
| Premium InboxesMailboxes | $184.50 / mo$122 more than Outreach2day25 inboxes × $3.50 $87.50 + Instantly Hypergrowth $97 | $447 / mo$197 more than Outreach2day100 inboxes × $3.50 $350 + Instantly Hypergrowth $97 | $1,384 / mo$384 more than Outreach2day400 inboxes × $3.00 $1,200 + Instantly Hypergrowth + add-on $184 |
| InboxKitMailboxes | $172 / mo$109.50 more than Outreach2day25 mailboxes × $3.00 $75 + Instantly Hypergrowth $97 | $397 / mo$147 more than Outreach2day100 mailboxes × $3.00 $300 + Instantly Hypergrowth $97 | $1,384 / mo$384 more than Outreach2day400 mailboxes × $3.00 $1,200 + Instantly Hypergrowth + add-on $184 |
Outreach2dayMailboxes + warmup + sequencer
- 25 mailboxes
- $62.50 / mo25 mailboxes × $2.50, warmup and a sequencer included $62.50
- 100 mailboxes
- $250 / mo100 mailboxes × $2.50, warmup and a sequencer included $250
- 400 mailboxes
- $1,000 / mo400 mailboxes × $2.50, warmup and a sequencer included $1,000
InstantlySequencer + mailboxes
- 25 mailboxes
- $222 / mo25 Google accounts × $5 $125 + Instantly Hypergrowth $97
- 100 mailboxes
- $597 / mo100 Google accounts × $5 $500 + Instantly Hypergrowth $97
- 400 mailboxes
- $2,184 / mo400 Google accounts × $5 $2,000 + Instantly Hypergrowth + add-on $184
SmartleadSequencer + mailboxes
- 25 mailboxes
- $206.50 / mo25 mailboxes × $4.50 $112.50 + Smartlead Pro $94
- 100 mailboxes
- $544 / mo100 mailboxes × $4.50 $450 + Smartlead Pro $94
- 400 mailboxes
- $2,028 / mo400 mailboxes × $4.50 $1,800 + Smartlead 240K sends $228
MaildosoMailboxes
- 25 mailboxes
- $202 / mo42 Maildoso mailboxes × $2.50 (the number needed at 15 a day) $105 + Instantly Hypergrowth $97
- 100 mailboxes
- $514.50 / mo167 Maildoso mailboxes × $2.50 (the number needed at 15 a day) $417.50 + Instantly Hypergrowth $97
- 400 mailboxes
- $1,851.50 / mo667 Maildoso mailboxes × $2.50 (the number needed at 15 a day) $1,667.50 + Instantly Hypergrowth + add-on $184
ZapmailMailboxes
- 25 mailboxes
- $188.50 / moZapmail Starter + 15 extra mailboxes $91.50 + Instantly Hypergrowth $97
- 100 mailboxes
- $396 / moZapmail Pro (100 mailboxes) $299 + Instantly Hypergrowth $97
- 400 mailboxes
- $1,383 / moZapmail Pro + 300 extra mailboxes $1,199 + Instantly Hypergrowth + add-on $184
MailforgeMailboxes
- 25 mailboxes
- $172 / moMailforge 25 slots $75 + Instantly Hypergrowth $97
- 100 mailboxes
- $397 / moMailforge 100 slots $300 + Instantly Hypergrowth $97
- 400 mailboxes
- $1,267 / moMailforge 400 slots $1,083 + Instantly Hypergrowth + add-on $184
Premium InboxesMailboxes
- 25 mailboxes
- $184.50 / mo25 inboxes × $3.50 $87.50 + Instantly Hypergrowth $97
- 100 mailboxes
- $447 / mo100 inboxes × $3.50 $350 + Instantly Hypergrowth $97
- 400 mailboxes
- $1,384 / mo400 inboxes × $3.00 $1,200 + Instantly Hypergrowth + add-on $184
InboxKitMailboxes
- 25 mailboxes
- $172 / mo25 mailboxes × $3.00 $75 + Instantly Hypergrowth $97
- 100 mailboxes
- $397 / mo100 mailboxes × $3.00 $300 + Instantly Hypergrowth $97
- 400 mailboxes
- $1,384 / mo400 mailboxes × $3.00 $1,200 + Instantly Hypergrowth + add-on $184
How we count: 550 cold emails per mailbox a month (25 a day on 22 working days), the same for every vendor. List prices on monthly billing, in USD, excluding domains, taxes and discounts. A vendor that does not sell sending gets the cheapest Instantly plan that covers the volume.
- Outreach2day: $2.50 per mailbox a month with warmup and the sequencer included, 12 mailboxes minimum source.
- Instantly: $5 per done-for-you Google account a month source (opens the vendor's page in a new tab); Sequencer with warmup: Instantly Growth $47 (5,000 emails), Hypergrowth $97 (125,000 emails), Hypergrowth + add-on $184 (250,000 emails), Light Speed $358 (500,000 emails) a month source (opens the vendor's page in a new tab).
- Smartlead: $4.50 per Google or Outlook SmartSenders mailbox a month source (opens the vendor's page in a new tab); Sequencer with warmup: Smartlead $39 (6,000 sends), $94 (90,000 sends), $174 (150,000 sends), $228 (240,000 sends), $282 (330,000 sends), $336 (420,000 sends), $379 (500,000 sends) a month source (opens the vendor's page in a new tab).
- Maildoso: Mailboxes: $2.50 each, Maildoso's price per mailbox on its 30-mailbox plan ($75 a month); up to 15 cold emails per mailbox a day, so we count the mailboxes needed for the same email volume source (opens the vendor's page in a new tab); Sequencer with warmup: Instantly Growth $47 (5,000 emails), Hypergrowth $97 (125,000 emails), Hypergrowth + add-on $184 (250,000 emails), Light Speed $358 (500,000 emails) a month source (opens the vendor's page in a new tab).
- Zapmail: Mailboxes: Starter $39 (10, extra $3.50), Growth $99 (30, extra $3.25), Pro $299 (100, extra $3.00) a month source (opens the vendor's page in a new tab); Sequencer with warmup: Instantly Growth $47 (5,000 emails), Hypergrowth $97 (125,000 emails), Hypergrowth + add-on $184 (250,000 emails), Light Speed $358 (500,000 emails) a month source (opens the vendor's page in a new tab).
- Mailforge: Slots: $3 a month for the first 10 and up to 100 add-on slots, then $0.10 less per 100 add-on slots, $2 above 1,000 source (opens the vendor's page in a new tab); Sequencer with warmup: Instantly Growth $47 (5,000 emails), Hypergrowth $97 (125,000 emails), Hypergrowth + add-on $184 (250,000 emails), Light Speed $358 (500,000 emails) a month source (opens the vendor's page in a new tab).
- Premium Inboxes: $3.50 per inbox (1–249), $3.00 (250–1,249), $2.80 (1,250+) a month source (opens the vendor's page in a new tab); Sequencer with warmup: Instantly Growth $47 (5,000 emails), Hypergrowth $97 (125,000 emails), Hypergrowth + add-on $184 (250,000 emails), Light Speed $358 (500,000 emails) a month source (opens the vendor's page in a new tab).
- InboxKit: $3.00 per mailbox a month on monthly billing; warmup from the Instantly plan instead of the $3 add-on source (opens the vendor's page in a new tab); Sequencer with warmup: Instantly Growth $47 (5,000 emails), Hypergrowth $97 (125,000 emails), Hypergrowth + add-on $184 (250,000 emails), Light Speed $358 (500,000 emails) a month source (opens the vendor's page in a new tab).
Included in the $2.50
Everything a cold email setup needs, in one mailbox price
One subscription at $2.50 a mailbox, from 12 mailboxes ($30 a month), everything included
- Sequencer included
Warmup and a sequencer
- Warmup for the life of every mailbox
- Campaigns, sequences, schedules and follow-ups
- One inbox for replies from all mailboxes
- Per mailbox
Analytics that show which mailboxes still land
- Warmup inbox, spam and bounce rate for every mailbox
- Sends by recipient provider
- Google and Outlook placement tests
- Deliverability
SSL domain masking and link protection
SSL domain masking on sending domains and automatic link replacement in emails; SPF, DKIM, DMARC and redirect to your site set up automatically
- REST API
An API on every account
Script domains, DNS and warmup, or pull mailbox data into your own tools
curl · public.outreach2day.com# OUTREACH2DAY_API_KEY: a key from app → API keyscurl "https://public.outreach2day.com/warmup/mailboxes?workspaceId=123" \ -H "Authorization: Bearer $OUTREACH2DAY_API_KEY" - MCP server
Run it from Claude, Cursor or Codex
Your AI assistant checks domains, quotes mailboxes and sets up DNS, warmup and campaigns. Add the server URL to Claude, ChatGPT, Cursor or Codex and sign in with your Outreach2day account; turn on Prepare orders at sign-in, then approve and pay on Stripe
Setup for each clientServer URLhttps://public.outreach2day.com/mcpOr install for every client · macOS / Linuxcurl -fsSL https://outreach2day.com/install | sh - 14 tools
Keep the sequencer you already use
Instantly and Smartlead sync by API key; 12 more get a CSV in their own import format. Setup per tool
Instantly
Smartlead
SalesHandy
Reply.io
Apollo
Snov.io
Mailshake
ReachInbox
PlusVibe
Luna
Nureply
Coldy
MailToaster
EmailBison
- Hundreds of mailboxes
Enterprise support
A shared Slack channel and a dedicated account team, for companies running hundreds or thousands of mailboxes
Talk to us
Free guide19 min read
Send 100,000 cold emails a month
Domains and mailboxes you need, DNS, warmup, lists, copy and follow-ups, with a launch checklist, sent to your inbox.
Side-by-side comparisons
- 10 best cold email infrastructure providersRanked list with prices checked per vendor, including Infraforge, Primeforge, Mailreef and Inframail
- Outreach2day vs InstantlyA cold email sending platform that also sells done-for-you Google accounts, pre-warmed accounts and its own SMTP inboxes.
- Outreach2day vs SmartleadA cold email sending platform that resells Google, Outlook and SMTP mailboxes from partner providers as SmartSenders.
- Outreach2day vs MaildosoSMTP mailboxes on Maildoso's own servers and IPs, from a 30-mailbox plan. No warmup and no sequencer.
- Outreach2day vs ZapmailGoogle Workspace and Microsoft 365 mailboxes with automated DNS, sold in plans of 10, 30 and 100. No sequencer.
- Outreach2day vs MailforgeShared-IP SMTP mailboxes billed per slot. Warmup (Warmforge) and sending (Salesforge) are separate Forge products.
- Outreach2day vs Premium InboxesGoogle Workspace and Microsoft 365 inboxes, set up for you and uploaded to your sequencer. It sells no sequencer of its own.
- Maildoso alternatives7 providers priced as a full setup
- Zapmail alternatives7 providers priced as a full setup
- Instantly alternatives7 providers priced as a full setup
- Mailforge alternatives7 providers priced as a full setup
- InboxKit alternatives7 providers priced as a full setup
- Inframail alternatives7 options side by side
- Cheap Inboxes alternatives7 options side by side
- Mailpool alternatives7 options side by side
- ScaledMail alternatives7 options side by side
- MailDeck alternatives7 options side by side
Buying guides
- Cold Email Agencies: How to Run Infrastructure per ClientCold email infrastructure for agencies: a workspace per client, free workspaces, volume planning across clients, Instantly/Smartlead sync, API and MCP
- Mailboxes for Cold Email: A Buyer's ChecklistTen things to check before you buy mailboxes for cold email, how eight vendors answer them, and the full monthly cost at 25, 100 and 400 mailboxes
- Google Workspace Alternatives for Cold EmailGoogle Workspace alternatives for cold email: SMTP mailboxes, Microsoft 365, self-hosted. Cost at 25, 100 and 400 mailboxes, sending limits, when to keep it
- Mailboxes for Instantly and Smartlead: Your Options ComparedWhere to get mailboxes for Instantly or Smartlead: DFY and pre-warmed accounts, SmartSenders, outside vendors or your own, with prices, ownership and setup
- Pre-Warmed Inboxes and Email Accounts: What You GetPre-warmed inboxes and email accounts from Instantly, Smartlead, Zapmail and Forge: prices, what carries over, the cost of warming your own, checks
- Google Workspace vs Microsoft 365 vs SMTP for Cold EmailGoogle Workspace, Microsoft 365 or SMTP mailboxes for cold email: limits, cost per mailbox, warmup and support in Instantly, Smartlead, lemlist, Apollo, Reply
- Instantly DFY Accounts vs Your Own Mailboxes: Cost and TermsInstantly done-for-you accounts against mailboxes on your own domains: prices, ownership, cancellation and total cost at 25, 100 and 400 mailboxes
- How Much Does Cold Email Cost? Line Items and ExamplesWhat cold email costs a month at 1,000, 5,000 and 20,000 emails a day: domains, mailboxes, warmup, sending, leads and verification, with the arithmetic shown
- Cold email capacity calculatorMailboxes, domains, monthly cost and warmup timeline for a monthly volume
Vendor reviews
One vendor per page, from its own pricing page, docs and terms: plans, limits, warmup, API and MCP, refunds, ratings, who it fits.
- InboxKit reviewGoogle Workspace, Microsoft 365 and Azure mailboxes on your domains, paid per mailbox from a prepaid wallet and exported to 24+ sequencers
- Zapmail reviewGoogle Workspace and Microsoft 365 mailboxes for cold email with automatic domain and DNS setup and export to sending tools
- Maildoso reviewSMTP mailboxes on Maildoso's own servers and IPs, priced in mailbox packs, exported to a sending tool you pay for separately
- Inframail reviewFlat-rate infrastructure: unlimited Microsoft-backed inboxes on your domains with dedicated US IPs and automatic DNS; sending runs in your sequencer
- Mailforge reviewShared-IP SMTP/IMAP mailboxes and domains in bulk with automatic DNS; no sequencer
- ScaledMail reviewManaged cold email infrastructure: Google Workspace, Microsoft 365 and SMTP inboxes set up and monitored by ScaledMail's team; warmup and sending run in your sequencer
- Cheap Inboxes reviewGoogle Workspace and Microsoft 365 inboxes, one domain per isolated workspace with admin access, with domains, automatic DNS and export to sequencers
- Primeforge reviewGoogle Workspace and Microsoft 365 mailboxes for cold email on US IPs, with automatic DNS and a pre-warmed option; no sequencer
- Mailpool reviewA self-serve platform that buys domains, sets DNS and creates SMTP, Google Workspace and Microsoft 365 inboxes, then exports them to outreach tools
- Premium Inboxes reviewA reseller of Google Workspace and Microsoft 365 inboxes with done-for-you setup, upload to your sequencer and free replacements
- MailDeck reviewManaged cold email infrastructure: Microsoft 365 tenants of up to 100 inboxes, Google Workspace and private SMTP inboxes, built on your domains and loaded into your sequencer by MailDeck's team
Vendor vs vendor
Two other vendors side by side, for buyers choosing between them.
- Maildoso vs ZapmailMaildoso vs Zapmail side by side: SMTP packs from $0.49 against Google and Microsoft plans from $39, warmup, sending caps, MCP servers, refunds, cost at 30 and 100.
- Zapmail vs InboxKitZapmail vs InboxKit: both sell Google and Microsoft mailboxes from $2.50 on yearly billing. Warmup, minimums, wallet billing, MCP, refunds and cost at 10 and 100 mailboxes.
- Mailforge vs InboxKitMailforge vs InboxKit: shared-IP SMTP slots from $3 to $2 against Google and Microsoft mailboxes at $3 ($2.50 yearly). Minimums, warmup, API, MCP, refunds, cost at 25.
- Maildoso vs InframailMaildoso vs Inframail: SMTP mailbox packs from $0.49 against a flat $147 for unlimited Microsoft inboxes on a dedicated IP. Sending caps, warmup, refunds and cost at 300.
- Zapmail vs Premium InboxesZapmail vs Premium Inboxes: Google and Microsoft mailboxes self-serve in plans against done-for-you setup per inbox. Prices at 30 and 100, warmup, billing cycles, refunds.
- Mailforge vs InfraforgeMailforge vs Infraforge, the two Forge SMTP products: shared IPs from $3 to $2 monthly against dedicated IPs from $4 to $3 billed quarterly. Cost at 25 and 100, limits, terms.
- MailDeck vs ScaledMailMailDeck vs ScaledMail side by side: Outlook at $30 per 100-inbox tenant against $50 per 25-mailbox domain, Google, SMTP, sending caps, setup, refunds, cost at 2,000 a day.
- MailDeck vs MaildosoMailDeck vs Maildoso side by side: private SMTP at $0.50 an inbox against packs of 300 and 1,000, MailDeck's Outlook and Google, warmup, API and MCP, refunds, cost at 300 and 1,000.
Cold email sequencers
Instantly, Smartlead, Reply.io, Apollo, lemlist and others from their own pages, each priced as a full setup (sequencer plan, mailboxes and domains) at 1,000, 5,000 and 10,000 cold emails a day.
- Instantly reviewCold email platform with unlimited connected mailboxes and built-in warmup; lead data, CRM and placement tests are separate add-ons
- Reply.io reviewSales engagement platform for email, LinkedIn, calls and SMS, with B2B data search and an AI SDR agent (Jason)
- lemlist reviewSales engagement platform for email, LinkedIn, calls, SMS and WhatsApp, with a lead database and lemwarm warmup
- Saleshandy reviewCold email platform with a built-in B2B contact database (Lead Finder), multichannel sequences, unified inbox and done-for-you mailboxes
- Reply.io alternatives7 options with the full monthly cost
- Apollo alternatives6 options with the full monthly cost
- lemlist alternatives6 options with the full monthly cost
- Snov.io alternatives6 options with the full monthly cost
- GMass alternatives5 options with the full monthly cost
- Smartlead alternatives6 options with the full monthly cost
- Instantly vs SmartleadInstantly vs Smartlead from both vendors' pages: plans, contact limits, warmup, mailboxes they sell, API, MCP, refunds, and the full monthly cost at 1,000, 5,000 and 10,000 emails a day.
- Instantly vs ApolloInstantly vs Apollo from their own pages: per-volume plans against per-seat plans with credits, mailbox limits per user, warmup, data, MCP, and the full cost at 1,000 to 10,000 cold emails a day.
- lemlist vs Instantlylemlist vs Instantly from their own pages: lemlist's Email and Multichannel plans against Instantly's contact-limited plans, warmup, mailboxes, MCP, refunds, and the cost at 1,000 to 10,000 emails a day.
- Smartlead vs EmailBisonSmartlead vs EmailBison for agencies: Smartlead's plans from $39 against EmailBison's single $599 plan, dedicated IPs, warmup, mailboxes, API and MCP, and the cost at 1,000 to 10,000 emails a day.
- Instantly vs PlusVibeInstantly vs PlusVibe from their own pages: $97 for 125,000 emails against $37 for 25,000 and $77 for 150,000, lead limits, done-for-you inboxes, API and MCP, and the cost at 1,000 to 10,000 emails a day.
- Smartlead vs PlusVibeSmartlead vs PlusVibe from their own pages: plans by sends and leads, warmup pools, done-for-you inboxes at $4.50 and $4, refunds, API and MCP, and the cost at 1,000 to 10,000 emails a day.
Cold email MCP servers, compared
Each vendor's official MCP server next to ours: what the tools cover, from the vendor's own docs.
- Instantly MCP vs Outreach2day MCPInstantly's full V2 API as tools, next to our infrastructure server; export between them
- Smartlead MCP vs Outreach2day MCPSmartlead's campaign and diagnostics server, next to our infrastructure server; export between them
- lemlist MCP vs Outreach2day MCPlemlist's prospecting, campaign and inbox server, next to our infrastructure server
- Apollo MCP vs Outreach2day MCPApollo's prospecting and sequences server, next to our infrastructure server
- Outreach2day MCP serverServer URL, setup per AI client, the full tool list
Each vendor's pricing, plan by plan
Every plan, the add-ons and domains that are billed on top, and the monthly cost at 25, 100 and 400 mailboxes.
- EmailBison Pricing 2026: The $599 Plan and Real CostEmailBison has one plan: $599 a month for 500,000 emails on a private instance with dedicated IPs and warmup. Extra volume, terms and cost at 1k-10k a day.
- GMass Pricing 2026: Plans, Team Prices and Real CostGMass costs $29.95 to $59.95 per Gmail account a month, teams from $175, plus $5 per 10,000 emails via outside SMTP. Plans, add-ons, cost at 1k-10k a day.
- InboxKit Pricing 2026: Plans, Add-Ons and Real CostInboxKit costs $3 per Google or Microsoft mailbox a month, $2.50 billed annually, no minimum. Add-ons, domains and the real cost at 25, 100 and 400 mailboxes.
- Infraforge Pricing 2026: Plans, Add-Ons and Real CostInfraforge costs $4 per mailbox a month billed quarterly, down to $3. What the slot price includes, the add-ons, and the cost at 25, 100 and 400 mailboxes.
- Instantly Pricing 2026: Plans, Add-Ons and Real CostInstantly pricing in 2026: $47–$358 a month plus mailboxes. Plans, add-ons and cost per 1,000 emails at 25, 100 and 400 mailboxes, with yearly prices.
- Maildoso Pricing 2026: Plans, Add-Ons and Real CostMaildoso costs $2.50 per mailbox on its 30-mailbox plan ($75 a month), without warmup or sending. What it includes and the full-setup cost at 25, 100 and 400.
- Mailforge Pricing 2026: Plans, Add-Ons and Real CostMailforge costs $3 per mailbox slot a month, down to $2 above 1,010 slots. What the slot includes, the Forge add-ons, and the cost at 25, 100 and 400 mailboxes.
- Mailpool Pricing 2026: Plans, Add-Ons and Real CostMailpool costs $3 per SMTP inbox, $4 per Google Workspace inbox and $5 per Microsoft 365 inbox a month. Add-ons and the cost at 25, 100 and 400 mailboxes.
- Outreach2day Pricing 2026: $2.50 per Mailbox, $30 MinimumOutreach2day pricing in 2026: $2.50 per mailbox a month, a 12-mailbox minimum ($30), domain prices, billing rules and a comparison for small senders.
- PlusVibe Pricing 2026: Plans, Add-Ons and Real CostPlusVibe costs $37 a month for 25,000 emails, $77 for 150,000 and from $497 for agencies, plus $4 per done-for-you Google inbox. Cost at 25, 100 and 400.
- Premium Inboxes Pricing 2026: Plans, Add-Ons and Real CostPremium Inboxes costs $3.50 per Google or Microsoft inbox a month, $3.00 from 250 and $2.80 from 1,250. Tiers, what's included, and the cost at 25, 100 and 400.
- Pricing of lemlist in 2026: Plans, Add-Ons and Real Costlemlist costs $69 a month for 50,000 emails on the Email plan, plus from $10 per Google mailbox bought in-app. Add-ons and cost at 25, 100 and 400 mailboxes.
- Primeforge Pricing 2026: Plans, Add-Ons and Real CostPrimeforge costs $4.50 per Google or Microsoft mailbox a month, down to $3.50, from 10 slots. Warmup, domains and the cost at 25, 100 and 400 mailboxes.
- Reply.io Pricing 2026: Plans, Active Contacts and Real CostReply.io costs $59-$99 per user for up to 5,000 active contacts, then $179-$999 a month to 100,000. Multichannel, Jason AI and cost at 1k-10k emails a day.
- Salesforge Pricing 2026: Plans, Add-Ons and Real CostSalesforge costs $48 a month for Pro and $96 for Growth, $40 and $80 billed yearly. Mailboxes are extra. Add-ons and the real cost at 25, 100 and 400 mailboxes.
- Saleshandy Pricing 2026: Plans, Mailboxes and Real CostSaleshandy costs $41 for Starter, $99 for Pro and $189-$599 for Scale, with Lead Finder and warmup. Mailboxes $2.99-$3.99. Cost at 1k-10k emails a day.
- ScaledMail Pricing 2026: Plans, Add-Ons and Real CostScaledMail costs $3.50 per Google mailbox a month, $50 per Outlook domain or $3.75 per SMTP domain. Add-ons, limits and the cost at 25, 100 and 400 mailboxes.
- Smartlead Pricing 2026: Plans, Add-Ons and Real CostSmartlead costs $39 to $379 a month plus $4.50 per SmartSenders mailbox. Plans, add-ons and cost per 1,000 sends, compared with Instantly and lemlist.
- Snov.io Pricing 2026: Plans, Credits and Real CostSnov.io costs $39 to $738 a month, priced by credits and recipients with unlimited seats and warmup. Mailboxes $5. Plans, add-ons and cost at 1k-10k a day.
- Zapmail Pricing 2026: Plans, Add-Ons and Real CostZapmail costs $39 a month for 10 Google or Microsoft mailboxes, $99 for 30 and $299 for 100. Extra mailboxes, domains, and the cost at 25, 100 and 400.
Questions
What is cold email infrastructure?
The mailboxes and domains you send cold email from, their DNS records (SPF, DKIM, DMARC), warmup, and the tool that sends the sequences. Some vendors sell only mailboxes, some only the sending tool, some both.
Which cold email infrastructure provider is cheapest?
For the full setup at 100 mailboxes: Outreach2day, at $250 a month. At 400 mailboxes: $1,000 with us, against $1,851.50 for Maildoso ($2.50 per mailbox on its 30-mailbox plan) plus an Instantly plan.
From 1,000 mailboxes Outreach2day quotes a volume price below the per-mailbox list price of every vendor in our comparisons, including Maildoso's $0.49, with warmup and sending in the price. Book a call and we quote your volume.
Do I need Google Workspace or Microsoft 365 mailboxes for cold email?
No. Plenty of teams send from SMTP/IMAP mailboxes, and ours are SMTP/IMAP. If you want Google or Microsoft, Zapmail, InboxKit and Premium Inboxes sell both, and Instantly sells Google accounts.
Why does Outreach2day score highest?
The criteria reward what we built: warmup and sending inside the mailbox price and a low full-setup cost. We lose points for SMTP-only mailboxes and no blacklist monitoring. The rules are published above, so you can re-weight them.
How often are these facts updated?
Vendors change prices often. The date each price was checked is printed under Sources. Found an outdated price? Email support@outreach2day.com and we'll fix it.
Deliverability call
Talk to our deliverability team
Book a call with the people who run our mailbox infrastructure. We look at your current setup and tell you what to change. Running 1,000+ mailboxes? We also quote a volume price below every vendor list price in our comparisons, warmup and sending included.
- Review your domains, DNS records and current inbox placement
- Size the setup: domains, mailboxes per domain and daily volume per mailbox
- Plan warmup and the move from your current provider or sequencer
- 1,000+ mailboxes: a volume price per mailbox for your setup
Free call
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Checked . Vendors change prices and plans; if something here is out of date, write to support@outreach2day.com and we will fix it.
Instantly
- instantly.ai/pricing
- help.instantly.ai/en/articles/10273259-instantly-plans-overview
- help.instantly.ai/en/articles/9969215-pre-warmed-domains-accounts
- help.instantly.ai/en/articles/10189418-premium-private-warmup-pool
- instantly.ai/email-accounts
- help.instantly.ai/en/articles/9361043-dfy-done-for-you-service-from-instantly-automated-email-setup
- help.instantly.ai/en/articles/10432807-api-v2
- help.instantly.ai/en/articles/12980002-instantly-mcp-model-context-protocol
Smartlead
- smartlead.ai/pricing
- helpcenter.smartlead.ai/en/articles/266-smartsenders-pricing
- smartlead.ai/buy-email-accounts
- smartlead.ai/email-deliverability-test
- helpcenter.smartlead.ai/en/articles/256-smartsenders-faqs-and-troubleshooting-everything-you-need-to-know
- smartlead.ai/blog/what-is-cold-email-mcp-server
Maildoso
Zapmail
Mailforge
Premium Inboxes
First cold emails on day 14, full volume on day 21
Add domains, create mailboxes and turn on warmup. You see every mailbox's warmup numbers from day one.
Create mailboxes$2.50 a mailbox, all in