The Warmforge Insider’s Guide
Everything we know about Warmforge in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Warmforge
The Insider’s Guide
Email warmup and inbox placement tests from the Salesforge team
Every plan, grade, refund rule and rival among email verification and deliverability tools, read from Warmforge’s own pages.
Made by Forge Ecosystem · checked Nov 12, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Warmforge’s own pages, its app-store listings and our grades. Every fact in it is on Warmforge’s page too, where it is kept up to date. Checked Nov 12, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.0
GPA, above 4 of the 38 other email verification and deliverability tools we grade
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.
To get you started, here are 8 things to know about Warmforge, taken from its own pages and our grades.
Placement tests that show delivery at Google and Outlook are sold as a separate subscription.
- 1
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.
- 2
Paid plans start at $10 a month
As its pricing page puts it: $10 per mailbox slot / month, billed quarterly.
- 3
It runs on Web
Web.
- 4
Automated warmup
AI-written emails exchanged to build trust with mailbox providers, started with one click.
- 5
Mailbox slots
Each slot covers one connected mailbox, and slots can be reassigned between mailboxes.
- 6
Placement tests
Sends from your mailbox to addresses at different providers to show delivery rates for Google, Outlook and others.
- 7
A 2.0 GPA, above 4 of 38
That is against the other email verification and deliverability tools we grade, on value, the free plan, features, ease of use and platforms.
- 8
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.
Warmforge at a glance
- Pricing
- Paid, from $10 per mailbox slot / month, billed quarterly
- Free plan
- No
- Free trial
- None stated
- Runs on
- Web
- Made by
- Forge Ecosystem
- Category
- Email Verification & Deliverability
- Our grade
- 2.0 GPA, fair
The report card
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.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | B | $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. |
| Free plan and trial | D | No 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. |
| Features | C | Automated 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. |
| Ease of use | C | A 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. |
| Platforms and integrations | C | Web only. The one integration on record is Salesforge, whose subscribers get unlimited slots. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
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 it 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
Good to know
Good for
- Cold outreach teams running several mailboxes
- Salesforge customers, who get unlimited slots
- Teams that want warmup and placement tests together
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.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$10
A month to start
Warmforge is a paid product, starting at $10 per mailbox slot / month, billed quarterly.
Email warm up
$10
per 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
$32.5
per month, billed annually ($39 billed monthly)
100 tests a month, 50 mailboxes per test.
Placement tests Growth
$140.8
per month, billed annually ($169 billed monthly)
Unlimited tests, 250 mailboxes per test.
Read from warmforge.ai on Nov 12, 2026.
Ways to pay less
Annual discount
Annual billing: 2 months free
The FAQ says choosing annual billing for mailboxes gives a discount of 2 months free.
Stated on warmforge.ai
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Email warmup and inbox placement tests from the Salesforge team. Here is what it does, as its own site describes it, and what it covers: reports, inbox warm-up.
Automated warmup, health checks of DNS, MX and blacklists, and placement tests.
- 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.
Where it runs
- Web
What it works with
- Salesforge
Warmforge is made by Forge Ecosystem.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
4/38
Other email verification and deliverability tools it is graded above
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
- DFree plan and trialAbove 3 of 38
- CFeaturesAbove 0 of 38
- CEase of useAbove 1 of 38
- CPlatforms and integrationsAbove 0 of 38
Price against what you get
Each dot is one of 26 email verification and deliverability tools. Further left costs less; higher up scores better on features, ease of use and platforms. Warmforge is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
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.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Mailwarm, Warmup Inbox, MailReach, Warmy and TrulyInbox
The 5 tools Warmforge is most often weighed against, with where each one differs from it.
- 1.6GPA
Mailwarm
From $69/mo
- 2.4GPA
Warmup Inbox
Free trial · from $15/mo
Email warm-up through a network of real inboxes, priced per inbox.
- Warmforge also covers reports.
- Warmup Inbox also covers email campaigns.
- 1.8GPA
MailReach
From $20/mo
Email warm-up and inbox placement tests, priced per mailbox.
- Warmforge also covers reports.
- 2.4GPA
Warmy
Free trial · from $49/mo
Email warm-up with seed testing, verification and DMARC monitoring.
- Only Warmy lists a browser extension.
- Warmforge also covers reports.
- Warmy also covers email verification and dMARC.
- 2.0GPA
TrulyInbox
Free plan · from $22/mo
Email warmup priced by warmup emails sent, not by mailbox.
- TrulyInbox has a free plan. Warmforge does not.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
13
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Warmforge free?
No. Warmforge is a paid product, starting at $10 per mailbox slot / month, billed quarterly.
How much does Warmforge cost?
Warmforge lists 3 plans. Email warm up: $10 per mailbox slot / month, billed quarterly ($30 per quarter).
What platforms does Warmforge work on?
Warmforge is available on Web.
Does Warmforge offer any discounts?
Warmforge publicly lists the following: Annual billing: 2 months free.
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.
What does Warmforge integrate with?
Warmforge's listing names Salesforge. A listing names up to eight integrations, so it may connect to more.
Who makes Warmforge?
Warmforge is made by Forge Ecosystem.
What are the alternatives to Warmforge?
The closest alternatives to Warmforge in our directory are Mailwarm, Warmup Inbox, MailReach, Warmy and TrulyInbox.
How does Warmforge compare with other 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.
Is Warmforge good value for money?
ToolGPA grades Warmforge B for value for money. 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.
Could I make my own version of Warmforge?
To replace Warmforge you would be making a network of real inboxes that open and answer your emails.
Where this guide comes from
The prices, plans, platforms and features were read from Warmforge’s own pages on Nov 12, 2026, and the grades were given on Nov 12, 2026. 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.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Forge Ecosystem. Prices change, so check warmforge.ai before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
5,038
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
5,038
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Warmforge, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/warmforge
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Warmforge: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/warmforge
Know someone choosing between email verification and deliverability tools?
Send them this guide: toolgpa.com/tools/warmforge/guide
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See our other guides
The best-graded email verification and deliverability tools after Warmforge, each with an Insider's Guide of its own.
- Email Verification & Deliverability Insider's GuideEvery one of the 40 email verification and deliverability tools we grade, compared
- QuickEmailVerification Insider's GuideBulk email list cleaning and a real-time verification API3.0 GPA
- Mail-Tester Insider's GuideSend an email to a test address and get a spam score out of 102.8 GPA
- Reoon Email Verifier Insider's GuideBulk and real-time email verification with refunds on unknowns2.8 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Warmforge’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Warmforge is a trademark of its owner, and this guide is not made, paid for or approved by Forge Ecosystem. Prices and plans change: check warmforge.ai before you buy.