Warmforge review (2026): is it worth $10 a month?
Email warmup and inbox placement tests from the Salesforge team
Black Friday: is there a Warmforge sale?
Warmforge report card
Fair · out of 4.0 · graded Nov 12, 2026
Best for warming up several sending mailboxes
Warmforge warms up mailboxes with AI-written messages and checks each one's health, charging per mailbox slot. Placement tests that show delivery at Google and Outlook are sold as a separate subscription. There is no trial and no free plan, so you pay before you see it work on your own mailbox.
Who Warmforge is for
- Fits if you run a handful of outreach mailboxes and want warmup and placement tests in one place
- Works for Salesforge customers, who get unlimited slots
Who Warmforge is not for
- Not for you if you want to try warmup free first, since there is no trial
- Pricey if you run many mailboxes: every connected mailbox needs its own $10 slot
- Watch out: placement test plans are $32.50 to $140.80 a month on top of warmup
- Skip it if you want a mobile or desktop app, as it is web only
- Watch out: buy fewer slots than mailboxes and the rest get switched off
Why Warmforge gets a 2.0
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- BValue for money$10 per mailbox slot a month, billed quarterly, is at the bottom edge of what this category charges. It is per mailbox though: one pays $30 a quarter, five pay $150.
- DFree plan and trialNo free plan and no trial. The only free thing is 1 placement test a month once you sign up, and warming a mailbox needs a paid slot.
- CFeaturesAutomated warmup, health checks of DNS, MX and blacklists, and placement tests. The tests are priced separately, and with too few slots it warms only from the top of your list and disables the rest.
- CEase of useA web app where you connect each mailbox and set up warmup. No rating on record, and the listing shows mailboxes to connect and DNS to check.
- CPlatforms and integrationsWeb only. The one integration on record is Salesforge, whose subscribers get unlimited slots.
What these grades rest on. Graded from this listing, whose facts were read from Warmforge'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/warmforge#review"><img src="https://toolgpa.com/badge/warmforge.svg" alt="Warmforge: 2.0 GPA on ToolGPA" width="196" height="56"></a>Where Warmforge stands among email verification and deliverability tools
Warmforge's GPA of 2.0 is higher than 4 of the 38 other email verification and deliverability tools we grade, and level with 7.
It stands best on value for money (B, above 25 of 38) and worst on free plan and trial (D, above 3).
Its paid plans start at $10 a month, against a middle price of $17.49 for the category: 5 of the 25 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 5 tools score higher and cost less.
Each grade against the category
Every bar is all 39 email verification and deliverability tools we grade, cut by the letter each got. Warmforge’s own letter is outlined.
- BValue for moneyAbove 25 of 38, level with 11
- DFree plan and trialAbove 3 of 38, level with 1
- CFeaturesAbove 0 of 38, level with 23
- CEase of useAbove 1 of 38, level with 28
- CPlatforms and integrationsAbove 0 of 38, level with 13
Price against what you get
Each dot is one of 26 email verification and deliverability 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 Warmforge, or make your own?
Keep it
To replace Warmforge 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: 27 of the 38 other email verification and deliverability tools grade higher. It costs $120 a year.
What you could make
- Reports: an app builder makes this well.
What you could not
- A network of real inboxes that open and answer your emails.
What this rests on. Warmforge’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 Warmforge?
Warmforge warms up mailboxes with AI-written messages that mimic human replies, and monitors each mailbox's health. Customers buy mailbox slots, each covering one connected mailbox. Separate placement test subscriptions show delivery rates at providers such as Google and Outlook. Salesforge subscribers get unlimited slots.
Worth knowing
- There is no free trial; mailbox slots must be bought to warm up, though you can sign up and run a free placement test.
- Placement test plans are sold separately from warmup slots, apart from 1 free test a month.
- If you buy fewer slots than mailboxes, the tool warms from the top of the list and disables the rest.
- The page says annual billing on mailboxes gives 2 months free, with no discount on domains.
Key features
- Automated warmup
- AI-written emails exchanged to build trust with mailbox providers, started with one click.
- Mailbox slots
- Each slot covers one connected mailbox, and slots can be reassigned between mailboxes.
- Placement tests
- Sends from your mailbox to addresses at different providers to show delivery rates for Google, Outlook and others.
- Health checks
- Checks DNS and MX records and scans blacklists for every connected mailbox.
Warmforge pricing
As of Nov 12, 2026, Warmforge is a paid product, starting at $10 per mailbox slot / month, billed quarterly.
- Starts at
- $10 per mailbox slot / month, billed quarterly
- Free plan
- None
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Email warm up | $10per mailbox slot / month, billed quarterly ($30 per quarter) | Includes automated AI warmup, 1 free placement test a month, and health checks of DNS and MX records and blacklist status. The page also offers monthly and annual billing. |
| Placement tests Pro | $32.5per month, billed annually ($39 billed monthly) | 100 tests a month, 50 mailboxes per test. |
| Placement tests Growth | $140.8per month, billed annually ($169 billed monthly) | Unlimited tests, 250 mailboxes per test. |
Read from warmforge.ai on Nov 12, 2026. Prices change, so confirm with Warmforge before you buy.
Ways to pay less
- Annual discountAnnual billing: 2 months free
The FAQ says choosing annual billing for mailboxes gives a discount of 2 months free.
Stated on warmforge.ai
Works with
- Salesforge
Warmforge alternatives
- Warmforge vs Mailwarm
From $69/mo
- Warmforge vs Warmup Inbox
Free trial · from $15/mo
- Warmforge vs MailReach
From $20/mo
- Warmforge vs Warmy
Free trial · from $49/mo
- Warmforge vs TrulyInbox
Free plan · from $22/mo
Common questions
Does Warmforge have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Warmforge is listed for Web.
Does Warmforge have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Warmforge is listed for Web.
Is Warmforge open source?
Warmforge is not described as open source on its own site, as read on Nov 12, 2026.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.