# Inboxkit review (2026): is it worth $2.50 a month, billed yearly? > Google and Microsoft mailboxes for cold email, priced per mailbox Checked Nov 12, 2026 ยท graded Nov 12, 2026 by ToolGPA. 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. - **Category:** Cold Outreach - **Made by:** Inboxkit (since 2023) - **Website:** https://www.inboxkit.com - **Runs on:** Web - **Who should skip it:** Skip it if you want a sending tool, since you still need a sequencer. - **Facts last checked:** Nov 12, 2026 ## Pricing As of Nov 12, 2026, Inboxkit is a paid product, starting at $2.50 per mailbox / month, billed yearly ($3 billed monthly). - **Pricing model:** Paid - **Free plan:** None. - **Free trial:** None listed. | Plan | Price | What you get | | --- | --- | --- | | 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. | Read from https://www.inboxkit.com/pricing on Nov 12, 2026. Prices change, so confirm with Inboxkit before buying. ## Ways to pay less - **Annual billing saves 17%** (Annual discount): Inboxkit's pricing page lists $2.50 per mailbox a month on annual billing against $3 monthly, and 10% off quarterly billing. Source: https://www.inboxkit.com/pricing ## 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. ## Good for - Teams that want real Google or Microsoft mailboxes for outreach - Agencies that manage many client domains - Buyers who prefer one flat per-mailbox rate with no base fee ## 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. ## ToolGPA grades **GPA: 1.8 out of 4**, graded Nov 12, 2026. 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. - **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. - **Free plan and trial: F.** No free plan and no trial. Each mailbox is charged from the first month, out of a prepaid wallet. - **Features: D.** It supplies mailboxes and DNS, and needs a sequencer like Instantly or Smartlead to do anything. Warmup and InfraGuard are add-ons. - **Ease of use: C.** No store rating on record. DNS is automated, but you still connect mailboxes to another tool. - **Platforms and integrations: B.** Web with an API, plus Instantly, Smartlead, Apollo, Google Workspace and Microsoft 365. These are ToolGPA's own grades. 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. ## Where it 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. The category's chart of price against score: https://toolgpa.com/charts/cold-outreach ## Keep it, 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. - You could not: A network of real inboxes that open and answer your emails. - You could not: Reading the reports inbox providers send about your domain. - You could not: It plugs into other products, Instantly, Smartlead and Apollo among them, and has an API. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with Instantly, Smartlead, Apollo, Google Workspace, Microsoft 365 **Tags:** Inbox warm-up, DMARC, Public API ## Alternatives - [Maildoso](https://toolgpa.com/tools/maildoso): Cold email mailboxes and domains sold by the mailbox. [Compare](https://toolgpa.com/compare/inboxkit-vs-maildoso) - [Mailforge](https://toolgpa.com/tools/mailforge): Shared-IP domains and mailboxes built for cold email sending. [Compare](https://toolgpa.com/compare/inboxkit-vs-mailforge) - [Infraforge](https://toolgpa.com/tools/infraforge): Private cold email infrastructure on dedicated IPs. [Compare](https://toolgpa.com/compare/inboxkit-vs-infraforge) - [Instantly](https://toolgpa.com/tools/instantly): Cold email from unlimited inboxes, priced by emails and contacts. [Compare](https://toolgpa.com/compare/inboxkit-vs-instantly) - [Smartlead](https://toolgpa.com/tools/smartlead): High-volume cold email with unlimited mailboxes and client workspaces. [Compare](https://toolgpa.com/compare/inboxkit-vs-smartlead) ## Sources The prices, plans, platforms and features above were read from these pages on Nov 12, 2026: - https://www.inboxkit.com/pricing - https://www.inboxkit.com/ - https://www.inboxkit.com/about Page: https://toolgpa.com/tools/inboxkit Listed by ToolGPA (toolgpa.com).