Inboxkit vs Zapmail (2026): which should you pick?
As of Nov 12, 2026, Inboxkit grades higher than Zapmail: 1.8 against 1.4 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 by ToolGPA
Inboxkit grades higher on value for money and platforms. They get the same grade on the free plan, features and ease of use.
Price, platforms and features side by side. The table says where each price was read and when.
Inboxkit
Google and Microsoft mailboxes for cold email, priced per mailbox
Which one is for you
Pick Inboxkit if
- Fits if you run a sequencer and need a lot of mailboxes fast
- Works for teams who want Google or Microsoft mailboxes, not shared SMTP
Look elsewhere if
- Skip it if you want a sending tool, since you still need a sequencer
- Not for you if you want a free trial, as there isn't one
- Watch out: warmup and InfraGuard are paid add-ons and their rates aren't shown
- Tight if you can't top up a prepaid wallet by card
Pick Zapmail if
- Fits if you run cold email from many Google mailboxes and want domains and DNS done for you
- Works for agencies that create client mailboxes in bulk through an API
Look elsewhere if
- Skip it if you want a try first, as there is no free plan or trial
- Pricey if you grow: 10 mailboxes are $39, 30 are $99, 100 are $299
- Watch out: Google Workspace mailbox pricing rises after the first year
- Watch out: API access is on Pro only, and the prices shown are monthly while quarterly and yearly tabs differ
- Not for you if you want to write or send campaigns, since it is mailbox infrastructure only
How we grade them
| 1.8GPAInboxkitWeak | 1.4GPAZapmailWeak | |
|---|---|---|
| Value for money | B$2.50 a mailbox a month on yearly billing, $3 monthly. Ten mailboxes is $25, in the cheapest quarter ($25). Domains cost extra, from $12.50 each, once. | C$39 a month for 10 mailboxes billed monthly is the middle of cold outreach tools. Extra mailboxes are $3.50 each, and Google raises its mailbox price after a year. |
| Free plan and trial | FNo free plan and no trial. Each mailbox is charged from the first month, out of a prepaid wallet. | FNo free plan and no trial on the page. A free tools menu exists, but the product itself starts at $39. |
| Features | DIt supplies mailboxes and DNS, and needs a sequencer like Instantly or Smartlead to do anything. Warmup and InfraGuard are add-ons. | DIt buys domains, sets DNS, creates mailboxes and connects them to a sending tool. It sends nothing itself, so it needs an outreach tool next to it. |
| Ease of use | CNo store rating on record. DNS is automated, but you still connect mailboxes to another tool. | CNo store rating on record. The vendor says setup averages 5 minutes, but you still have to connect the mailboxes to a sender and manage domains. |
| Platforms and integrations | BWeb with an API, plus Instantly, Smartlead, Apollo, Google Workspace and Microsoft 365. | CWeb only and Google Workspace only. An API is on the $299 Pro plan. |
| Best for | Google and Microsoft mailboxes for cold email | buying Google Workspace mailboxes for cold email |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Inboxkit and Zapmail. How we grade
Price against what you get
Inboxkit starts at $2.50 a month and scores 2.0 out of 4 on features, ease of use and platforms. Zapmail starts at $39 a month and scores 1.7.
Inboxkit scores higher and starts $36.50 a month lower. Of the other cold outreach tools on the chart, none scores higher than Inboxkit for less, and 21 score higher than Zapmail for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Inboxkit also covers dMARC.
At a glance
| Inboxkit | Zapmail | |
|---|---|---|
| Pricing | Paid | Paid |
| Starts at | $2.50 per mailbox / month, billed yearly ($3 billed monthly) | $39 per month for 10 Google Workspace mailboxes, billed monthly |
| Free plan | None | None |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Inboxkit | Outbox Labs Inc. |
| Price read from | inboxkit.com | zapmail.ai |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
Inboxkit
- Mailboxes are paid from a prepaid wallet topped up by card, with NET-30 invoicing offered only for large volumes.
- Warmup and InfraGuard are paid add-ons; the pricing page does not give their rates.
- There is no free trial: creating an account is free, but each mailbox is charged from the first month.
- The page says there is no promo code; the saving comes from choosing quarterly or annual billing.
Zapmail
- The listed prices are monthly; the page also has quarterly and yearly tabs, and its description says annual plans start from $2.50 per inbox.
- Google Workspace mailbox pricing rises after the first year, and mailboxes that have completed a year are charged at the updated price.
- It supplies mailboxes and domains only; campaigns are sent from a separate outreach tool.
- API access is on the Pro plan only; volume pricing for larger senders is by talking to sales.
Key features
Inboxkit
- Official Google and Microsoft accounts
- Mailboxes are real Google Workspace or Microsoft 365 accounts with admin panel access and 2FA for each domain.
- Automated DNS setup
- SPF, DKIM and DMARC records are configured for you, and an isolated panel is kept per domain.
- Sequencer connections
- The vendor lists 24+ integrations with sequencers such as Instantly, Smartlead and Apollo, plus a full REST API with webhooks.
- Mailbox analytics
- Per-mailbox bounce and reply metrics, real-time monitoring and weekly mailbox reports.
- Warmup and InfraGuard add-ons
- Warmup runs on an isolated network, priced per mailbox; InfraGuard watches blacklists and DNS every 6 hours, with the first month free.
- MCP server
- An Inboxkit MCP server lets an AI assistant query mailboxes, domains, DNS and warmup, with hard-to-undo changes waiting for approval.
Zapmail
- Automated mailbox setup
- Creates Google Workspace mailboxes, sets DNS records and connects them to an outreach tool. The site gives an average setup time of 5 minutes.
- Domains
- Customers can bring their own domains or buy new ones, and each workspace holds one domain to keep sending reputations separate.
- Pre-warmed mailboxes
- A separate pre-warmed option is sold with domains included, starting from $6 per mailbox, to skip the first 3 to 4 weeks of warm-up.
- ZapShield
- Daily blacklist monitoring at $3 per domain a month, with a free replacement domain if one is listed.
- Deliverability test and AI Insights
- Monthly credits for inbox placement tests and AI-generated insights are included on every plan.
- API
- An API for creating mailboxes and domains from another product is included on the Pro plan.
Plans
Inboxkit
Google or Microsoft 365 mailbox$2.50
per mailbox / month, billed yearly ($3 billed monthly)
Same rate at any volume. Includes DNS setup, a domain admin panel, API access and unlimited team members.
Azure tenant$30
per tenant / month, up to 100 mailboxes
Microsoft 365 mailboxes on Azure; each tenant holds up to 100 mailboxes.
Pre-warmed mailbox$6
per mailbox / month, domain warmed 2-4 weeks
$7 at 4-8 weeks and $9 at 8+ weeks of warming, billed monthly; each domain also has a one-time fee from $12.50.
Zapmail
Starter$39
per month for 10 Google Workspace mailboxes, billed monthly
Extra mailboxes at $3.50 each; 3 deliverability test credits and 3 AI Insights credits a month; standard support.
Growth$99
per month for 30 Google Workspace mailboxes, billed monthly
Extra mailboxes at $3.25 each; 10 deliverability test credits and 10 AI Insights credits a month; standard support.
Pro$299
per month for 100 Google Workspace mailboxes, billed monthly
Extra mailboxes at $3.00 each; 30 deliverability test credits and 30 AI Insights credits a month; priority support and API access.
Ways to pay less
Inboxkit
- Annual discount
Annual billing saves 17%
Inboxkit's pricing page lists $2.50 per mailbox a month on annual billing against $3 monthly, and 10% off quarterly billing.
Zapmail
- Annual discount
Yearly billing, 2 months free
The pricing page's billing switch labels the yearly option as 2 months free and shows quarterly billing as well. Those prices are not shown in the default monthly view.
Common questions
Which is cheaper, Inboxkit or Zapmail?
As of Nov 12, 2026, Inboxkit is cheaper to start with: $2.50 a month, against $39 a month for Zapmail. Inboxkit starts at $2.50 per mailbox / month, billed yearly ($3 billed monthly), and Zapmail starts at $39 per month for 10 Google Workspace mailboxes, billed monthly.
Which has a free plan, Inboxkit or Zapmail?
As of Nov 12, 2026, neither Inboxkit nor Zapmail has a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.