Zapmail vs Premium Inboxes: Google and Microsoft mailboxes, self-serve or built for you
Both sell Google Workspace and Microsoft 365 mailboxes for cold email. Zapmail is self-serve, in plans, with warm-up handled and an MCP server. Premium Inboxes builds and uploads the inboxes for you, replaces them for free and gives you a Slack line, at $3.50 an inbox below 250.
- Warm-up and sending included
- $2.50 a mailbox, 12 minimum
- Month-to-month billing
Zapmail
Premium Inboxes
- Price per mailbox
- from $2.50 (Pro, yearly); $2.99 on monthly Profrom $2.80 (1,250+ inboxes); $3.50 under 250
- Smallest order
- Starter: 10 mailboxes, $39 a monthNone stated; Start Up begins at 1 inbox
- Mailbox types
- Google, MicrosoftGoogle, Microsoft
- Warm-up
- Handled by Zapmail per its FAQ; no separate price or schedule publishedTurned on in your sequencer during setup; no warm-up product of its own
Zapmail vs Premium Inboxes, line by line
Each cell links to the vendor's page it comes from.
| Feature | Zapmail | Premium Inboxes |
|---|---|---|
| Smallest order | Starter: 10 mailboxes, $39 a month source (opens the vendor's page in a new tab) | None stated; Start Up begins at 1 inbox source (opens the vendor's page in a new tab) |
| Setup time | 5 minutes on average, per the home page source (opens the vendor's page in a new tab) | 12 business hours standard, 6 with paid priority; marketing says most inboxes are live in under 6 hours source (opens the vendor's page in a new tab) |
| Mailbox types | Google Workspace and Microsoft 365 on US or EU IPs; one domain per workspace source (opens the vendor's page in a new tab) | Google Workspace and Microsoft 365 business accounts only source (opens the vendor's page in a new tab) |
| Domains | Bought through Zapmail (10+ extensions) or your own; bought domains belong to you source (opens the vendor's page in a new tab) | Your own; the pricing page also offers theirs, price not published source (opens the vendor's page in a new tab) |
| Sending limits | No daily cap published for standard plans; pre-warmed mailboxes start at 20 a day source (opens the vendor's page in a new tab) | No more than 15 cold emails per inbox a day recommended source (opens the vendor's page in a new tab) |
| Warm-up | IncludedHandled by Zapmail per its FAQ; no separate price or schedule published source (opens the vendor's page in a new tab) | Not includedTurned on in your sequencer during setup; no warm-up product of its own source (opens the vendor's page in a new tab) |
| Sequencers | 23 OAuth platforms incl. Instantly, Smartlead, Lemlist, Saleshandy, Apollo; one-click to ReachInbox, Instantly, Smartlead, Reply.io source (opens the vendor's page in a new tab) | Uploaded into Instantly, Smartlead, Apollo, Lemlist, Reply.io or EmailBison source (opens the vendor's page in a new tab) |
| API | IncludedPublic API with webhooks; listed on Pro plans source (opens the vendor's page in a new tab) | IncludedREST API on every plan: orders, subscriptions, email accounts; 100 requests a minute source (opens the vendor's page in a new tab) |
| MCP server | IncludedHosted MCP server (OAuth 2.1) with 134 tools for domains, mailboxes, workspaces, billing source (opens the vendor's page in a new tab) | Not includedNone found; an LLM-ready API reference page source (opens the vendor's page in a new tab) |
| Support | Email and help center; priority support on Pro; hours not published source (opens the vendor's page in a new tab) | A shared Slack channel with the founder and team; email source (opens the vendor's page in a new tab) |
| Refunds | No refunds, except duplicate billing or service not set up within 7 business days source (opens the vendor's page in a new tab) | No refunds, except a license never activated and asked for within 7 days source (opens the vendor's page in a new tab) |
| Trial | Not published source (opens the vendor's page in a new tab) | Not published source (opens the vendor's page in a new tab) |
Smallest order
- Zapmail
- Starter: 10 mailboxes, $39 a month source (opens the vendor's page in a new tab)
- Premium Inboxes
- None stated; Start Up begins at 1 inbox source (opens the vendor's page in a new tab)
Setup time
- Zapmail
- 5 minutes on average, per the home page source (opens the vendor's page in a new tab)
- Premium Inboxes
- 12 business hours standard, 6 with paid priority; marketing says most inboxes are live in under 6 hours source (opens the vendor's page in a new tab)
Mailbox types
- Zapmail
- Google Workspace and Microsoft 365 on US or EU IPs; one domain per workspace source (opens the vendor's page in a new tab)
- Premium Inboxes
- Google Workspace and Microsoft 365 business accounts only source (opens the vendor's page in a new tab)
Domains
- Zapmail
- Bought through Zapmail (10+ extensions) or your own; bought domains belong to you source (opens the vendor's page in a new tab)
- Premium Inboxes
- Your own; the pricing page also offers theirs, price not published source (opens the vendor's page in a new tab)
Sending limits
- Zapmail
- No daily cap published for standard plans; pre-warmed mailboxes start at 20 a day source (opens the vendor's page in a new tab)
- Premium Inboxes
- No more than 15 cold emails per inbox a day recommended source (opens the vendor's page in a new tab)
Warm-up
- Zapmail
- IncludedHandled by Zapmail per its FAQ; no separate price or schedule published source (opens the vendor's page in a new tab)
- Premium Inboxes
- Not includedTurned on in your sequencer during setup; no warm-up product of its own source (opens the vendor's page in a new tab)
Sequencers
- Zapmail
- 23 OAuth platforms incl. Instantly, Smartlead, Lemlist, Saleshandy, Apollo; one-click to ReachInbox, Instantly, Smartlead, Reply.io source (opens the vendor's page in a new tab)
- Premium Inboxes
- Uploaded into Instantly, Smartlead, Apollo, Lemlist, Reply.io or EmailBison source (opens the vendor's page in a new tab)
API
- Zapmail
- IncludedPublic API with webhooks; listed on Pro plans source (opens the vendor's page in a new tab)
- Premium Inboxes
- IncludedREST API on every plan: orders, subscriptions, email accounts; 100 requests a minute source (opens the vendor's page in a new tab)
MCP server
- Zapmail
- IncludedHosted MCP server (OAuth 2.1) with 134 tools for domains, mailboxes, workspaces, billing source (opens the vendor's page in a new tab)
- Premium Inboxes
- Not includedNone found; an LLM-ready API reference page source (opens the vendor's page in a new tab)
Support
- Zapmail
- Email and help center; priority support on Pro; hours not published source (opens the vendor's page in a new tab)
- Premium Inboxes
- A shared Slack channel with the founder and team; email source (opens the vendor's page in a new tab)
Refunds
- Zapmail
- No refunds, except duplicate billing or service not set up within 7 business days source (opens the vendor's page in a new tab)
- Premium Inboxes
- No refunds, except a license never activated and asked for within 7 days source (opens the vendor's page in a new tab)
Trial
- Zapmail
- Not published source (opens the vendor's page in a new tab)
- Premium Inboxes
- Not published source (opens the vendor's page in a new tab)
Zapmail and Premium Inboxes prices
Zapmail
| Plan | Price | Mailboxes | Per mailbox | Billing | Includes |
|---|---|---|---|---|---|
| Starter | $39 a month | 10 (extra $3.50) | $3.90 | monthly | 3 placement-test and 3 AI Insights credits a month source (opens the vendor's page in a new tab) |
| Growth | $99 a month | 30 (extra $3.25) | $3.30 | monthly | 10 test and 10 AI Insights credits a month source (opens the vendor's page in a new tab) |
| Pro | $299 a month | 100 (extra $3.00) | $2.99 | monthly | API access, priority support, 30 test credits a month source (opens the vendor's page in a new tab) |
| Pre-warmed Starter | $39 first month, then $24 | 3 | $8.00 | monthly | 1 domain; 12+ weeks of warm-up history source (opens the vendor's page in a new tab) |
| Pre-warmed Growth | $149 first month, then $84 | 12 | $7.00 | monthly | 4 domains source (opens the vendor's page in a new tab) |
| Pre-warmed Pro | $339 first month, then $180 | 30 | $6.00 | monthly | 10 domains source (opens the vendor's page in a new tab) |
Premium Inboxes
| Plan | Price | Mailboxes | Per mailbox | Billing | Includes |
|---|---|---|---|---|---|
| Start Up | $3.50 an inbox | 1–249 | $3.50 | monthly | Setup, upload to your sequencer, unlimited replacements source (opens the vendor's page in a new tab) |
| Growth | $3.00 an inbox | 250–1,249 | $3.00 | monthly | Adds 24-hour health checks and alerts source (opens the vendor's page in a new tab) |
| Enterprise | $2.80 an inbox | 1,250+ | $2.80 | monthly | Account manager, Slack channel, active monitoring source (opens the vendor's page in a new tab) |
| Insured Infrastructure | $4.50 an inbox | all inboxes | $4.50 | monthly | Account manager, priority build queue, advanced analytics source (opens the vendor's page in a new tab) |
| Deliverability Shield | $99 a month | account-wide | n/a | monthly | Daily domain and inbox health checks, priority replacements source (opens the vendor's page in a new tab) |
| Operations Tier | $7,500 a month | inboxes extra | n/a | monthly | Managed deliverability team, by application source (opens the vendor's page in a new tab) |
List prices from Zapmail's pricing page and Premium Inboxes's pricing page, checked . Taxes and card fees excluded.
Cost at 30 and 100 inboxes
30 inboxes: Zapmail Growth is $99 a month. Premium Inboxes is $105 per four-week period (30 × $3.50), which its own calculator shows too.
100 inboxes: Zapmail Pro is $299 a month, $250 on yearly billing. Premium Inboxes is $350 per four weeks.
Over a year: Zapmail Pro monthly is $3,588; Premium Inboxes at 100 inboxes is $4,550 across 13 billing periods.
Where they differ
Who does the work
With Zapmail you buy domains, assign mailboxes and export them in the dashboard, through the API or through its MCP server; setup averages five minutes per its home page.
Premium Inboxes' engineers build the inboxes, check DNS by hand and upload them into your sequencer; its delivery policy promises 12 business hours, 6 with paid priority.
Warm-up and daily volume
Zapmail's FAQ says it handles warm-up, and it sells pre-warmed mailboxes. Premium Inboxes turns warm-up on in your sequencer and recommends no more than 15 cold emails per inbox a day.
Refunds
Both are strict. Zapmail refunds duplicate billing or a setup not done in 7 business days. Premium Inboxes refunds a license never activated, asked for within 7 days.
Which one to pick
Pick Zapmail if
- You want to provision yourself, by API or an AI assistant
- You want warm-up handled or pre-warmed mailboxes
- You want calendar-month billing at a lower per-inbox price
Pick Premium Inboxes if
- You want someone else to build, check and upload the inboxes
- You want unlimited free replacements
- You want a shared Slack channel with the team
Where Outreach2day fits
We sell cold email mailboxes too, so this section is ours. The comparison above does not rank us.
We sell SMTP/IMAP mailboxes, so if Google or Microsoft accounts are the requirement, choose between these two. If the requirement is reaching the inbox at the lowest cost, our 30 mailboxes cost $75 a month with warm-up and a sending engine, and each can send 25 cold emails a day.
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 warm-up and sending in the price. Book a call and we quote your volume.
Zapmail vs Premium Inboxes: questions
Is Zapmail cheaper than Premium Inboxes?
Yes at 30 and 100 inboxes: $99 against $105, and $299 against $350, with Premium Inboxes billed every four weeks.
Do both sell Google and Microsoft inboxes?
Yes, each at the same price for both providers.
Which includes warm-up?
Zapmail, per its FAQ. Premium Inboxes turns warm-up on in your sequencer.
Which one sets everything up for me?
Premium Inboxes. Its team builds the inboxes and uploads them to your sequencer. Zapmail is self-serve.
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, warm-up 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 warm-up and the move from your current provider or sequencer
- 1,000+ mailboxes: a volume price per mailbox for your setup
Free call
See open times in your time zone and book on this page.
Or open the booking pageLoading available times…
Open the booking page insteadMore on Zapmail and Premium Inboxes
- Zapmail reviewPlans, limits, warm-up, API and MCP, support and refunds, with sources
- Zapmail alternativesOptions side by side with prices and mailbox types
- Outreach2day vs ZapmailFeature table and full-setup cost
- Maildoso vs ZapmailTwo vendors side by side
- Zapmail vs InboxKitTwo vendors side by side
- Zapmail pricing 2026Every plan and what it costs at 25, 100 and 400 mailboxes
- Premium Inboxes reviewPlans, limits, warm-up, API and MCP, support and refunds, with sources
- Outreach2day vs Premium InboxesFeature table and full-setup cost
- Premium Inboxes pricing 2026Every plan and what it costs at 25, 100 and 400 mailboxes
- Pre-Warmed Inboxes and Email Accounts: What You GetBlog
- Google Workspace Alternatives for Cold EmailBlog
Sources
Each vendor's own pages. Vendors change prices and plans; if something here is out of date, write to support@outreach2day.com and we will fix it.
Zapmail
- zapmail.ai
- docs.zapmail.ai/unified-provider-launch-oct-13-2026-2467594m0.md
- help.zapmail.ai/en/articles/9541225-subscriptions-plans-everything-you-need-to-know
- zapmail.ai/features/zapshield
- help.zapmail.ai/en/articles/13358418-pre-warmed-mailboxes-in-zapmail-complete-guide
- help.zapmail.ai/en/articles/10225033-supported-platforms-for-third-party-mailbox-exports
- docs.zapmail.ai/llms.txt
- docs.zapmail.ai/mcp-2408514m0
- help.zapmail.ai/en/articles/9759194-refund-policy-for-zapmail-ai
- zapmail.ai/features/placement-test
- trustpilot.com/review/zapmail.ai
- g2.com/products/zapmail/reviews
First cold emails on day 14, full volume on day 21
Add domains, create mailboxes and turn on warm-up. You see every mailbox's warm-up numbers from day one.