Inboxkit vs Infraforge (2026): which should you pick?
As of Nov 12, 2026, Inboxkit grades higher than Infraforge: 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
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 Infraforge if
- Fits if you send cold email at volume and want dedicated IPs
- Works for agencies managing many domains through an API
Look elsewhere if
- Skip it if you want a sending tool, because you still need one
- Pricey if you add an IP, at $99 a month each
- Watch out: slots are billed whether or not a mailbox is created in them
- Not for you if you want a trial: there isn't one
How we grade them
| 1.8GPAInboxkitWeak | 1.6GPAInfraforgeWeak | |
|---|---|---|
| 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$4 a slot a month on quarterly billing, with a 10-slot minimum, so $40 at the floor. That sits mid-category before domains and add-ons. |
| 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. Each Forge product is a separate subscription. |
| 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, DKIM, SPF and DMARC, warm-up and rotation. But it only supplies the sending infrastructure and needs another product to send. |
| Ease of use | CNo store rating on record. DNS is automated, but you still connect mailboxes to another tool. | CNo store rating on record. Automatic DNS setup, but you buy domains, build slots and connect a sender. |
| Platforms and integrations | BWeb with an API, plus Instantly, Smartlead, Apollo, Google Workspace and Microsoft 365. | BWeb with an API, and a Forge family of Salesforge, Mailforge, Warmforge and Primeforge. |
| Best for | Google and Microsoft mailboxes for cold email | dedicated-server 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 Infraforge. 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. Infraforge starts at $4 a month and scores 2.0.
They score the same, and Inboxkit starts $1.50 a month lower. Of the other cold outreach tools on the chart, none scores higher than Inboxkit for less, and none scores higher than Infraforge 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 | Infraforge | |
|---|---|---|
| Pricing | Paid | Paid |
| Starts at | $2.50 per mailbox / month, billed yearly ($3 billed monthly) | $4 per mailbox slot / month, billed quarterly, with a 10-slot minimum |
| Free plan | None | None |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Inboxkit | Infraforge |
| Price read from | inboxkit.com | infraforge.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.
Infraforge
- Slots are billed whether or not a mailbox is created in them, with a minimum of 10.
- Domains are bought separately; the calculator prices .com at $14 a year, charged once, with no annual discount on domains.
- Extra add-ons cost more: $99 a month per additional IP address, $2 per domain a month for SSL and domain masking, and $7 to $9 per workspace a month for Masterbox.
- There is no free trial, and each Forge product is a separate subscription.
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.
Infraforge
- Dedicated servers and IPs
- Mailboxes send from dedicated servers, in contrast with Mailforge's shared IP pool; extra IP addresses can be added.
- Automated DNS setup
- DKIM, SPF and DMARC records are configured for each domain, with bulk DNS updates inside the app.
- Warm-up and monitoring
- The page lists automated warm-up, real-time deliverability monitoring and alerts, sender rotation and smart sending limits.
- API, MCP and CLI
- The Infraforge API is included with the subscription and can manage domains and mailboxes programmatically.
- Pre-warmed mailboxes
- Pre-warmed infrastructure is offered for sending right away.
- Workspaces and Masterbox
- Multiple workspaces, plus a Masterbox add-on that shows all emails across a workspace's accounts in one view.
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.
Infraforge
Mailbox slots$4
per mailbox slot / month, billed quarterly, 10-slot minimum
Slots are charged whether or not a mailbox is created. The calculator shows 25 slots at $100 a month billed quarterly, or $83 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.
Infraforge
- 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 Infraforge?
As of Nov 12, 2026, Inboxkit is cheaper to start with: $2.50 a month, against $4 a month for Infraforge. Inboxkit starts at $2.50 per mailbox / month, billed yearly ($3 billed monthly), and Infraforge starts at $4 per mailbox slot / month, billed quarterly, with a 10-slot minimum.
Which has a free plan, Inboxkit or Infraforge?
As of Nov 12, 2026, neither Inboxkit nor Infraforge 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.