Inboxkit review (2026): is it worth $2.50 a month, billed yearly?
Google and Microsoft mailboxes for cold email, priced per mailbox
Black Friday: is there a Inboxkit sale?
Inboxkit report card
Weak · out of 4.0 · graded Nov 12, 2026
Best for Google and Microsoft mailboxes for cold email
Inboxkit sells Google Workspace, Microsoft 365 and Azure mailboxes for outreach, with DNS set up for you. Mailboxes are $2.50 each a month on yearly billing. It isn't a sending tool, there is no trial, and warmup and InfraGuard are paid add-ons with no rates shown.
Who Inboxkit is for
- 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
Who Inboxkit is not for
- 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
Why Inboxkit gets a 1.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- BValue for money$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.
- FFree plan and trialNo free plan and no trial. Each mailbox is charged from the first month, out of a prepaid wallet.
- DFeaturesIt supplies mailboxes and DNS, and needs a sequencer like Instantly or Smartlead to do anything. Warmup and InfraGuard are add-ons.
- CEase of useNo store rating on record. DNS is automated, but you still connect mailboxes to another tool.
- BPlatforms and integrationsWeb with an API, plus Instantly, Smartlead, Apollo, Google Workspace and Microsoft 365.
What these grades rest on. Graded from this listing, whose facts were read from Inboxkit's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/inboxkit#review"><img src="https://toolgpa.com/badge/inboxkit.svg" alt="Inboxkit: 1.8 GPA on ToolGPA" width="196" height="56"></a>Where Inboxkit stands among cold outreach tools
Inboxkit's GPA of 1.8 is higher than 5 of the 47 other cold outreach tools we grade, and level with 3.
It stands best on value for money (B, above 29 of 47) and worst on free plan and trial (F, above 0).
Its paid plans start at $2.50 a month, against a middle price of $39 for the category: 0 of the 43 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4, and no tool on the category's chart scores higher without costing more.
Each grade against the category
Every bar is all 48 cold outreach tools we grade, cut by the letter each got. Inboxkit’s own letter is outlined.
- BValue for moneyAbove 29 of 47, level with 10
- FFree plan and trialAbove 0 of 47, level with 10
- DFeaturesAbove 0 of 47, level with 6
- CEase of useAbove 0 of 47, level with 43
- BPlatforms and integrationsAbove 9 of 47, level with 38
Price against what you get
Each dot is one of 44 cold outreach tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
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
Keep Inboxkit, or make your own?
Keep it
To replace Inboxkit you would be making a network of real inboxes that open and answer your emails. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 39 of the 47 other cold outreach tools grade higher. It costs $30 a year.
What you could not
- A network of real inboxes that open and answer your emails.
- Reading the reports inbox providers send about your domain.
- It plugs into other products, Instantly, Smartlead and Apollo among them, and has an API.
What this rests on. Inboxkit’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Inboxkit?
Inboxkit sells Google Workspace, Microsoft 365 and Azure mailboxes set up for outreach, with DNS records configured automatically and an admin panel for each domain. It is email infrastructure that connects to sequencers rather than a sending tool. There are no plans or minimums; each mailbox is charged on its own renewal date from a prepaid wallet.
Worth knowing
- 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.
Key features
- 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.
Inboxkit pricing
As of Nov 12, 2026, Inboxkit is a paid product, starting at $2.50 per mailbox / month, billed yearly ($3 billed monthly).
- Starts at
- $2.50 per mailbox / month, billed yearly ($3 billed monthly)
- Free plan
- None
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Google or Microsoft 365 mailbox | $2.50per 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 | $30per tenant / month, up to 100 mailboxes | Microsoft 365 mailboxes on Azure; each tenant holds up to 100 mailboxes. |
| Pre-warmed mailbox | $6per 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. |
Read from inboxkit.com on Nov 12, 2026. Prices change, so confirm with Inboxkit before you buy.
Ways to pay less
- Annual discountAnnual 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.
Stated on inboxkit.com
Works with
- Instantly
- Smartlead
- Apollo
- Google Workspace
- Microsoft 365
Inboxkit alternatives
- Inboxkit vs Maildoso
From $75/mo
- Inboxkit vs Mailforge
From $3/mo
- Inboxkit vs Infraforge
From $4/mo
- Inboxkit vs Instantly
Free trial · from $37.6/mo
- Inboxkit vs Smartlead
Free trial · from $32/mo
Common questions
Does Inboxkit have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Inboxkit is listed for Web.
Does Inboxkit have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Inboxkit is listed for Web.
Is Inboxkit open source?
Inboxkit is not described as open source on its own site, as read on Nov 12, 2026.
Does Inboxkit have an API?
Yes. Inboxkit offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.