Inboxkit vs Primeforge (2026): which should you pick?
As of Nov 13, 2026, Inboxkit grades higher than Primeforge: 1.8 against 1.6 out of 4.0.
Checked Nov 12, 2026 and Nov 13, 2026 · graded Nov 12, 2026 and Nov 13, 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 Primeforge if
- Fits if you send cold email at volume and want Google or Microsoft mailboxes
- Works for teams already using Salesforge or another Forge product
Look elsewhere if
- Skip it if you want to test it first, as nothing is free
- Too light on its own, since you still need a separate tool to send
- Tight if you only need a few mailboxes: the minimum is 10 slots, billed even when empty
- Watch out: each Forge product is its own subscription, and domains get no yearly discount
How we grade them
| 1.8GPAInboxkitWeak | 1.6GPAPrimeforgeWeak | |
|---|---|---|
| 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$38 a month for 10 mailbox slots on yearly billing ($45 monthly), about $4.50 a slot, plus $14 a year for each .com domain. That is the middle of the category's range before the sender you also need. |
| 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, because domains and mailboxes have to be bought first. |
| Features | DIt supplies mailboxes and DNS, and needs a sequencer like Instantly or Smartlead to do anything. Warmup and InfraGuard are add-ons. | DMailboxes, domains and DNS only. It sends no emails, finds no leads and needs another product to be useful. |
| Ease of use | CNo store rating on record. DNS is automated, but you still connect mailboxes to another tool. | CNo store rating on record. You buy domains, set up mailboxes and connect them to a sending tool. |
| Platforms and integrations | BWeb with an API, plus Instantly, Smartlead, Apollo, Google Workspace and Microsoft 365. | BWeb, with an API and links to the other Forge products. The listing names no wider integrations. |
| Best for | Google and Microsoft mailboxes for cold email | buying Google and Microsoft 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 Primeforge. 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. Primeforge starts at $38 a month and scores 2.0.
They score the same, and Inboxkit starts $35.50 a month lower. Of the other cold outreach tools on the chart, none scores higher than Inboxkit for less, and 19 score higher than Primeforge 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 | Primeforge | |
|---|---|---|
| Pricing | Paid | Paid |
| Starts at | $2.50 per mailbox / month, billed yearly ($3 billed monthly) | $38 per month for 10 mailbox slots, billed yearly ($45 billed monthly) |
| Free plan | None | None |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Inboxkit | Primeforge |
| Price read from | inboxkit.com | primeforge.ai |
| Checked | Nov 12, 2026 | Nov 13, 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.
Primeforge
- Primeforge sells infrastructure only: sending needs a separate tool such as Salesforge.
- No free trial is offered, because domains and mailboxes must be bought first.
- Each Forge product is a separate subscription, and domains get no annual discount.
- Slots are billed whether or not mailboxes are created, with a 10-slot minimum.
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.
Primeforge
- Google and Microsoft mailboxes
- Provides Google Workspace and Microsoft 365 mailboxes, so a sender can match the provider a prospect uses, which the vendor says helps inbox placement.
- Automated DNS setup
- Configures DKIM, DMARC and SPF records automatically. Domains stay under your control and DNS records can still be edited.
- Pre-warmed mailboxes
- The vendor lists pre-warmed mailboxes that can be added to Salesforge or other sending software, with setup in about 30 minutes.
- Pricing calculator
- Estimates the domains and mailboxes needed from emails per sequence, mailboxes per domain and contacts per month.
- Hosting, API and support
- The subscription covers inbox hosting and maintenance, API access and customer support. Two 1-to-1 expert sessions are sold separately for $500.
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.
Primeforge
Mailbox slots$38
per month for 10 mailbox slots, billed yearly ($45 billed monthly)
Minimum purchase is 10 slots, about $4.50 per slot on monthly billing. Slots can be reused when mailboxes are deleted.
Domains$14
per .com domain / year, charged once
Domains are bought through Primeforge for the calculator's example; there is no yearly discount on domains.
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.
Primeforge
- Annual discount
Two months free on yearly billing
Yearly billing for mailboxes comes with a discount of two months free, according to the FAQ. Domains are excluded.
Common questions
Which is cheaper, Inboxkit or Primeforge?
As of Nov 13, 2026, Inboxkit is cheaper to start with: $2.50 a month, against $38 a month for Primeforge. Inboxkit starts at $2.50 per mailbox / month, billed yearly ($3 billed monthly), and Primeforge starts at $38 per month for 10 mailbox slots, billed yearly ($45 billed monthly).
Which has a free plan, Inboxkit or Primeforge?
As of Nov 13, 2026, neither Inboxkit nor Primeforge 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.