Warmforge
Warmforge is an email warm-up and deliverability tool for Google Workspace and Outlook mailboxes.
What Warmforge is
Warmforge is an email warm-up and deliverability tool for Google Workspace and Outlook mailboxes. It uses AI-written emails to mimic human mailbox behavior and automatically warms mailboxes; the service recommends allowing at least two weeks before outreach. Health Checks monitor DNS and MX records and check blacklist status. Placement tests report delivery rates to different email providers, and each plan includes one free test per month. Warmforge says it automatically removes warm-up emails that land in spam. Its warm-up pool uses aged accounts and is dominated by Google Workspace and Microsoft 365 mailboxes. Users can explore features for free, but mailbox warming requires purchased slots. Each slot covers one mailbox, and mailboxes above the purchased slot count are disabled for warming. The Email Warm Up plan costs $10 a month, billed quarterly, and includes one free slot. Placement Tests Pro costs $39 a month for 100 tests; Placement Tests Growth costs $169 a month for unlimited tests. API access and Forge CLI mailbox management are also available.
Good
- Automates warm-up using AI-written emails.
- Checks mailbox DNS, MX records, and blacklist status.
- Each plan includes one free placement test per month.
- API access and Forge CLI are available.
- Subscriptions can be canceled at any time.
Watch out
- No free trial for mailbox warming.
- Each mailbox needs a purchased slot.
- Extra mailboxes are disabled for warm-up.
- Warmforge recommends at least two weeks of warming.
Who it suits
Warmforge suits teams preparing Google Workspace or Outlook mailboxes for outreach and monitoring deliverability. Users who need warming should account for purchased mailbox slots; exploring features for free does not include a warming trial.
Verdict
Warmforge combines mailbox warm-up with health checks and placement testing. Its free feature access does not remove the need to purchase slots for mailbox warming.
Plans and prices
From Warmforge's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Email Warm Up | $10 a month | 1 free slot included · automated AI email warm up · 1 free placement test per month · DNS and MX health checks · blacklist checks · Per month, billed quarterly |
| Placement Tests Pro | $39 a month | 100 tests per month · 50 mailboxes per test · Billed monthly |
| Placement Tests Growth | $169 a month | Unlimited tests · 250 mailboxes per test · Billed monthly |
The facts
Each one read from Warmforge's own pages, with the date it was checked.
What it does
- API and CLI
- Warmforge offers API access, and the Forge CLI supports Warmforge mailbox management, warm-up stats, and placement tests.checked 8 Oct 2026
- Cancellation
- Warmforge says mailbox slot and placement test subscriptions can be canceled at any time.checked 8 Oct 2026
- Deliverability boost
- Warmforge says it automatically removes warm-up emails that land in spam.checked 8 Oct 2026
- Email providers
- Warmforge works with Google Workspace and Outlook mailboxes.checked 8 Oct 2026
- Health checks
- Health Checks monitor mailbox DNS and MX records and check blacklist status.checked 8 Oct 2026
- Mailbox slot limit
- Each mailbox slot covers one mailbox, and mailboxes beyond the purchased slot count are disabled for warm-up.checked 8 Oct 2026
- Placement tests
- Placement tests report mailbox delivery rates to different email service providers, and each Warmforge plan includes one free test per month.checked 8 Oct 2026
- Product
- Warmforge is an email warm-up and deliverability tool that mimics human mailbox behavior using AI-written emails.checked 8 Oct 2026
- Salesforge
- Salesforge users get unlimited Warmforge mailbox slots at no extra cost.checked 8 Oct 2026
- Security
- Warmforge's homepage states that it is SOC 2 compliant.checked 8 Oct 2026
- Support
- The site says users can contact support via chat.checked 8 Oct 2026
- Warm-up
- The product warms mailboxes automatically and recommends warming them for at least two weeks before outreach.checked 8 Oct 2026
- Warm-up pool
- The warm-up pool is described as curated, made up of aged accounts, and dominated by Google Workspace and Microsoft 365 mailboxes.checked 8 Oct 2026
The company
- Founded
- 2022checked 28 Sep 2026
Money
- Free access
- Users can explore Warmforge features for free, but the site says there is no free trial for warming mailboxes because mailbox slots must be purchased.checked 8 Oct 2026
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