Inboxkit vs Mailforge (2026): which should you pick?
As of Nov 12, 2026, Inboxkit grades higher than Mailforge: 1.8 against 1.6 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 by ToolGPA
Inboxkit grades higher on value for money. They get the same grade on the free plan, features, ease of use and platforms.
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
Mailforge
Shared-IP domains and mailboxes built for cold email sending
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 Mailforge if
- Fits if you want cheap mailboxes for a sequencer you already pay for
- Works for small senders happy on shared IPs
Look elsewhere if
- Skip it if you want a tool that sends campaigns, as it doesn't
- Not for you if you want a trial, since there isn't one
- Watch out: slots are charged whether or not a mailbox is created
- Pricey if you add domains and masking: .com is $14 a year and masking is $2 per domain a month
How we grade them
| 1.8GPAInboxkitWeak | 1.6GPAMailforgeWeak | |
|---|---|---|
| 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$3 a slot a month billed monthly, with a 10-slot minimum, so $30 at the floor. Just above the category's cheaper quarter ($25), before domains. |
| 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 or trial. You can look around after signing up, but sending means buying domains and mailboxes. |
| Features | DIt supplies mailboxes and DNS, and needs a sequencer like Instantly or Smartlead to do anything. Warmup and InfraGuard are add-ons. | DDomains, mailboxes and DNS only. It needs a separate sender to be useful, and shared IPs share a reputation. |
| Ease of use | CNo store rating on record. DNS is automated, but you still connect mailboxes to another tool. | CNo store rating on record. DNS is automated, but domains, slots and a sender all have to be put together. |
| Platforms and integrations | BWeb with an API, plus Instantly, Smartlead, Apollo, Google Workspace and Microsoft 365. | BWeb with an API, and Salesforge, Infraforge, Warmforge and Primeforge from the same maker. |
| Best for | Google and Microsoft mailboxes for cold email | bulk mailboxes for cold email on shared IPs |
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 Mailforge. 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. Mailforge starts at $3 a month and scores 2.0.
They score the same, and Inboxkit starts $0.50 a month lower. Of the other cold outreach tools on the chart, none scores higher than Inboxkit for less, and none scores higher than Mailforge 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
At a glance
| Inboxkit | Mailforge | |
|---|---|---|
| Pricing | Paid | Paid |
| Starts at | $2.50 per mailbox / month, billed yearly ($3 billed monthly) | $3 per mailbox slot / month, billed monthly, with a 10-slot minimum |
| Free plan | None | None |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Inboxkit | Mailforge |
| Price read from | inboxkit.com | mailforge.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.
Mailforge
- Slots are billed whether or not a mailbox is created in them, and the minimum purchase is 10.
- Domains are bought separately; the calculator prices .com at $14 a year, charged once, with no annual discount on domains.
- There is no free trial; the app can be explored after sign-up, but domains and mailboxes must be purchased to send.
- Each Forge product is a separate subscription, and SSL and domain masking costs $2 per domain a month.
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.
Mailforge
- Automated DNS setup
- Each domain added gets DMARC, SPF, DKIM and custom domain tracking configured, with bulk DNS updates in the app.
- Shared IP pool
- Mailboxes are spread across a shared IP pool, in contrast with Infraforge's dedicated servers.
- Pre-warmed domains and mailboxes
- The page says domains and mailboxes can be bought pre-warmed so sequences can start right away.
- Workspaces and domain transfers
- Projects can have their own workspaces, and domains can be transferred in or out.
- Works with any sending tool
- Mailboxes connect to any sending software, including Salesforge from the same vendor.
- SSL and domain masking
- An add-on that redirects securely while masking the domain behind a branded website.
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.
Mailforge
Mailbox slots$3
per mailbox slot / month, billed monthly, 10-slot minimum
Slots are the capacity to create mailboxes and are charged whether used or not. The calculator shows 25 slots at $75 a month, or $60 a month billed yearly.
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.
Mailforge
- Annual discount
Two months free on annual mailbox billing
The FAQ says annual billing for mailboxes gets 2 months free automatically; there is no discount on domains.
Common questions
Which is cheaper, Inboxkit or Mailforge?
As of Nov 12, 2026, Inboxkit is cheaper to start with: $2.50 a month, against $3 a month for Mailforge. Inboxkit starts at $2.50 per mailbox / month, billed yearly ($3 billed monthly), and Mailforge starts at $3 per mailbox slot / month, billed monthly, with a 10-slot minimum.
Which has a free plan, Inboxkit or Mailforge?
As of Nov 12, 2026, neither Inboxkit nor Mailforge 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.