AlternativesPrices checked

InboxKit alternatives: warm-up and sending in the price, $147 a month less at 100 mailboxes

InboxKit charges $3 per Google or Microsoft mailbox on monthly billing, $2.50 only on annual billing, and $3 more per mailbox for warm-up. It has no sequencer. Outreach2day charges $2.50 on monthly billing with warm-up and a sending engine included: $250 at 100 mailboxes against $397 for InboxKit plus an Instantly plan. We make Outreach2day and rank it first.

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  • Warm-up and sending included
  • $2.50 a mailbox, 12 minimum
  • No contract

Full setup · 100 mailboxes · 55,000 emails a month

$147less a month with Outreach2day, $1,764 a year

Outreach2day$250 / mo
InboxKit + Instantly$397 / mo

Mailboxes, warm-up and a sending engine at list prices, monthly billing. Line items in the cost table below.

teams have used Outreach2day
3,600+
emails sent a day
40M+

Among them

  • SalesSourcers
  • Vivid
  • OptiQ.AI
  • SLSBMB
  • Outreacher
  • Outpush

Why Outreach2day

Why Outreach2day tops this list

  • $2.50 without a year's commitment

    InboxKit reaches $2.50 per mailbox only on annual billing, paid in advance and generally non-refundable. Our $2.50 is the month-to-month price.

  • Warm-up is not an add-on

    InboxKit's warm-up costs $3 per mailbox a month, as much as the mailbox. At 100 mailboxes that is $300 a month. Ours runs on every mailbox inside the $2.50.

  • A sender in the same bill

    InboxKit exports to 24+ sequencers, and you pay one of them. Campaigns, sequences and a reply inbox are part of our subscription.

InboxKit sells Google Workspace, Microsoft 365 and Azure mailboxes with no minimum. Ours are SMTP/IMAP from 12 mailboxes.

Ranked

7 InboxKit alternatives, ranked

Why each one is an alternative to this vendor, its mailbox price with the source, and the monthly cost of the full setup.

  1. 1. Outreach2day: warm-up and sending included, monthly billing

    $250 a month at 100lowest

    The mailbox, its warm-up (25+ warm-up emails a day to Google recipients, 25 to Outlook, 25 to other providers) and the sending engine are one $2.50 line. Leaving InboxKit for us removes two bills: the $3 warm-up add-on and the sequencer. Mailboxes are SMTP/IMAP on your domains, not Google or Microsoft, and they sync to Instantly or Smartlead if you keep one. source

    Warm-up includedSending included

  2. 2. Zapmail: Google and Microsoft mailboxes with warm-up handled

    $396 a month at 100

    The closest swap if you need Google Workspace or Microsoft 365: Zapmail sells both at the same prices in plans of 10, 30 and 100, and its FAQ says it handles warm-up. There is no sequencer, and Zapmail gives no refunds. source (opens the vendor's page in a new tab)

    Warm-up includedSending not included

  3. 3. Premium Inboxes: done-for-you Google and Microsoft inboxes

    $447 a month at 100

    Premium Inboxes builds the inboxes, checks DNS by hand and uploads them to your sequencer, with free replacements. Per inbox it costs more than InboxKit ($3.50 under 250 inboxes), and warm-up runs in your sequencer. source (opens the vendor's page in a new tab)

    Warm-up extra or partialSending not included

  4. 4. Mailforge: SMTP slots inside the Forge products

    $397 a month at 100

    If you are moving off Google and Microsoft to cut cost, Mailforge sells shared-IP SMTP slots from $3 a month. Warm-up is Warmforge and sending is Salesforge, each a separate subscription. source (opens the vendor's page in a new tab)

    Warm-up extra or partialSending not included

  5. 5. Maildoso: SMTP mailboxes at $2.50 for teams with a sequencer

    $514.50 a month at 100

    Maildoso's mailbox price matches InboxKit's annual price on monthly billing, but each mailbox sends up to 15 cold emails a day, warm-up comes from another tool, and the plan starts at 30 mailboxes. source (opens the vendor's page in a new tab)

    Warm-up not includedSending not included

  6. 6. Instantly: Google accounts bought inside the sequencer

    $597 a month at 100

    Instantly sells done-for-you Google accounts at $5 a month on top of its plan, with warm-up in the plan. The accounts work only inside Instantly, and Instantly keeps the domains. source (opens the vendor's page in a new tab)

    Warm-up includedSending extra or partial

  7. 7. Smartlead: Google, Outlook and SMTP mailboxes inside Smartlead

    $544 a month at 100

    SmartSenders are Google and Outlook mailboxes at $4.50, resold from Zapmail and InfraInbox, plus SMTP from $3.99. They stay inside Smartlead, and the Smartlead plan is extra. source (opens the vendor's page in a new tab)

    Warm-up includedSending extra or partial

Monthly cost at 100 mailboxes = mailboxes, warm-up and a sending engine at list prices, without domains. A vendor without a sending engine gets the cheapest Instantly plan for the volume.

About InboxKit

InboxKit: pricing, limits and who it fits

From InboxKit's own pages, read .

Pricing model
A flat price per mailbox, the same for Google Workspace and Microsoft 365: $3.00 a month on monthly billing, $2.70 quarterly, $2.50 on annual billing. No plans, no slots and no minimum.source (opens the vendor's page in a new tab)
Azure
Azure tenants are priced per tenant: $30 a month for up to 100 mailboxes.source (opens the vendor's page in a new tab)
Warm-up
An add-on at $3 per mailbox a month: a 14-day isolated warm-up, then low ongoing volume alongside outreach.source (opens the vendor's page in a new tab)
Monitoring
InfraGuard, an add-on with the first month free: blacklist, DNS, bounce-rate and inbox-placement checks every six hours, with alerts and auto-pause.source (opens the vendor's page in a new tab)
Sending
No sequencer. One-click export to 24+ sequencers, including Instantly, Smartlead, lemlist and Apollo; API with webhooks on every plan.source (opens the vendor's page in a new tab)
Refunds
Subscriptions are billed in advance and generally non-refundable, with no pro-rata refunds; domains are non-refundable once registered.source (opens the vendor's page in a new tab)

What InboxKit is good at

Pick InboxKit if

  • You want Google Workspace or Microsoft 365 mailboxes one at a time, without a plan or a minimum.
  • You already send from a sequencer with warm-up and can commit to annual billing for the $2.50 price.

Cost

What the full setup costs each month

Mailboxes, warm-up and a sending engine at the same email volume, every line item listed. Set your volume.

Outreach2day, mailboxes/ moWarm-up, sending, the inbox and analytics included.
Create 100 mailboxes

The same volume elsewhere

  • Outreach2day
    Mailboxes with warm-up and sending included
  • InboxKit more
    $3.00 per mailbox a month on monthly billing; warm-up from the Instantly plan instead of the $3 add-on; sending engine with warm-up: 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
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The details

What InboxKit costs with warm-up and a sender

InboxKit's mailbox price depends on the billing term: $3.00 a month on monthly billing, $2.70 quarterly, $2.50 annual. Warm-up is $3 per mailbox a month. InfraGuard monitoring is an add-on with the first month free. Subscriptions are billed in advance and generally non-refundable.

With the warm-up in an Instantly plan instead of InboxKit's add-on: $172 at 25 mailboxes, $397 at 100, $1,384 at 400. With InboxKit's own warm-up the mailbox line doubles: $600 a month at 100 mailboxes before a sequencer. Ours: $62.50, $250 and $1,000, all in.

Google and Microsoft mailboxes or SMTP

InboxKit sells real Google Workspace and Microsoft 365 accounts. If your client or your team requires those, the alternatives are Zapmail, Premium Inboxes, Instantly's Google accounts or SmartSenders.

If the requirement is inbox placement and not the account type, test before you decide. Mail from the same mailbox can land in the inbox at Outlook and in spam at Gmail, whoever hosts it. Our mailboxes come with Google and Outlook placement tests, so you can compare them against your InboxKit mailboxes on the same copy.

Pick by the reason you are leaving InboxKit

The bill is too high: most of it is usually the warm-up add-on and the sequencer. Outreach2day removes both; Maildoso and Mailforge lower the mailbox line but keep the sequencer.

You don't want to prepay a year for $2.50: our $2.50 is billed month to month, and Maildoso's $2.50 is its monthly plan price from 30 mailboxes.

You need Google or Microsoft but want warm-up handled: Zapmail. You want someone else to build and replace the inboxes: Premium Inboxes.

You want mailboxes and sending from one vendor and don't mind the lock-in: Instantly or Smartlead, whose own mailboxes stay inside their tools.

Customers

What customers say

  • “That was the best infrastructure and value for money I saw.”
    Ido RebhunIdo RebhunRenaissance
  • “…deliverability with your inboxes is better than our outlook/google inboxes…”
    Daniel DultsinDaniel DultsinControl
  • “We really would like to thank you for that report. We don’t know what we are doing with email and it is very reassuring to us to know we have a partner on top of the ball.”
    ReilcapBill OConnorReilcap

Switching

Switching from InboxKit

  1. Create mailboxes in Outreach2day on new domains. SPF, DKIM and DMARC are set automatically.
  2. Warm-up starts on its own. Send no cold email from them for 14 days.
  3. Keep your InboxKit mailboxes sending while ours ramp; ours reach up to 25 cold emails a day around day 21.
  4. Send from our engine, or sync the new mailboxes to the sequencer you export InboxKit mailboxes to today.
  5. Cancel InboxKit at the end of its billing period. On annual billing, plan the switch for the renewal date: InboxKit gives no pro-rata refunds.
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FAQ

InboxKit alternatives: questions

What is the cheapest InboxKit alternative?

For the full setup at 100 mailboxes, Outreach2day at $250 a month, with warm-up and sending included. InboxKit plus an Instantly plan costs $397.

Does InboxKit include warm-up?

No. Warm-up is an add-on at $3 per mailbox a month: 14 days of isolated warm-up, then low ongoing volume. Outreach2day includes warm-up in the $2.50 mailbox.

Which InboxKit alternatives sell Google Workspace mailboxes?

Zapmail, Premium Inboxes and Instantly. Smartlead resells Google and Outlook mailboxes as SmartSenders. Outreach2day, Maildoso and Mailforge sell SMTP mailboxes.

Is InboxKit's $2.50 the same as Outreach2day's $2.50?

No. InboxKit's $2.50 is the annual-billing price of the mailbox alone. Ours is the monthly price and includes warm-up and the sending engine.

What does InboxKit's InfraGuard add-on check?

Blacklists, DNS records, bounce rate and inbox placement every six hours, with alerts and auto-pause; the first month is free. Our per-mailbox warm-up inbox, spam and bounce rates and the Google and Outlook placement tests come with the mailbox.

Does InboxKit have a minimum order?

No, you can buy one mailbox. Our minimum is 12 mailboxes, $30 a month.

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.

  • 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

Free call

See open times in your time zone and book without leaving the page.

Or open the booking page

Keep reading

More comparisons and guides

Sources

Checked . Vendors change prices and plans; if something here is out of date, write to support@outreach2day.com and we will fix it.

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