InboxKit vs Zapmail
InboxKit (Google & Microsoft mailboxes) and Zapmail (Google & Microsoft mailboxes) are both google/microsoft reseller options. For 30 mailboxes on 10 domains, InboxKit is cheaper at $98.72/mo vs $107.72/mo for Zapmail, a difference of $9.00 a month ($108 a year).
Last updated 2026-10-23 · list prices, monthly billing
Verdict by use case
Side by side
| InboxKit | Zapmail | |
|---|---|---|
| Mailbox type | Google/Microsoft reseller | Google/Microsoft reseller |
| Platform | GoogleMicrosoft | GoogleMicrosoft |
| Per mailbox / month | $3.00 $3.00 monthly, $2.50 on annual billing. Azure: $30/tenant/month (up to 100 mailboxes). | $3.30 Plan prices ($39/10, $99/30, $299/100) from a third-party table (outboxes.io/compare); Zapmail's own page lists additional mailboxes at $3.50 / $3.25 / $3.00 by plan but plan totals did not render. |
| 30 mailboxes / month | $90 | $99 |
| + 10 domains / month | $8.72 * | $8.72 * |
| Total / month | $98.72 | $107.72 |
| Minimum | None | 10 mailboxes (starter plan, third-party) |
| Warmup | Add-on | Optional |
| Sending cap | None published | None published |
| Price source | Provider page | Third-party table |
* Reference .com price used (provider domain price not published).
Frequently asked questions
Is InboxKit cheaper than Zapmail?
For 30 mailboxes + 10 domains on monthly list prices, InboxKit is cheaper: $98.72/mo vs $107.72/mo (checked 2026-10-23).
What's the difference between InboxKit and Zapmail?
InboxKit: Google & Microsoft mailboxes, $3.00 per mailbox, minimum none, warmup add-on. Zapmail: Google & Microsoft mailboxes, $3.30 per mailbox, minimum 10 mailboxes (starter plan, third-party), warmup optional.
Which is better for cold email, InboxKit or Zapmail?
On price, InboxKit wins for a 30-inbox setup. Beyond price, compare platform (Google/Microsoft vs Google/Microsoft), minimums and warmup. MailboxWatch doesn't test deliverability.