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inboxwarm.ai
What it is
InboxWarm.ai automatically warms Gmail, Outlook, and SMTP inboxes to build sender reputation, improve inbox placement, and reduce spam placement. It sends, opens, and replies to warmup messages using contextual replies generated by large language models and human-like sending patterns. InboxWarm describes its seed network as private and made up of real inboxes. Its spam recovery feature marks warmup messages as not spam and moves them to the primary inbox when they land in spam. Supported setups include Gmail, Outlook, SendGrid, Amazon SES, Mailgun, Yahoo, and custom SMTP/IMAP. Plans include SPF, DKIM, and DMARC domain-health monitoring and real-time inbox-placement tracking. Every plan includes a public REST API with 30 endpoints; the default rate limit is 20 requests per minute per API key. Monthly prices range from $15 a month for one mailbox to $5 a month for 51–100 mailboxes, with up to 100 warmup emails per inbox per day on those listed tiers. A 10-day trial covers one email account without a credit card.
Spec sheet
- What it does
- InboxWarm.ai automatically warms Gmail, Outlook, and SMTP inboxes to build sender reputation, improve inbox placement, and reduce spam placement.Read 30 Sep 2026 · inboxwarm.ai
- API
- The public REST API provides 30 endpoints for email accounts, warmup, deliverability, reports, spam tests, and system functions, included in every plan.Read 30 Sep 2026 · inboxwarm.ai
- Integrations
- Supported sending setups include Gmail, Outlook, SendGrid, Amazon SES, Mailgun, Yahoo, and custom SMTP/IMAP.Read 30 Sep 2026 · inboxwarm.ai
- Security
- InboxWarm says credentials are encrypted end-to-end, never stored in plain text, and can be deleted with account data from the dashboard.Read 30 Sep 2026 · inboxwarm.ai
- Support
- InboxWarm says its support team is available 24/7 by email at [email protected].Read 30 Sep 2026 · inboxwarm.ai
- Headquarters
- 8 The Green, STE A, Dover, DE 19901, USRead 28 Sep 2026 · inboxwarm.ai
- Founded
- 2026Read 28 Sep 2026 · inboxwarm.ai
- AI engagement
- The service sends, opens, and replies to warmup emails using LLM-generated contextual replies and human-like sending patterns.Read 30 Sep 2026 · inboxwarm.ai
- API limit
- The default API rate limit is 20 requests per minute per API key.Read 30 Sep 2026 · inboxwarm.ai
- Authentication monitoring
- Plans include SPF, DKIM, and DMARC domain-health monitoring plus real-time inbox-placement tracking.Read 30 Sep 2026 · inboxwarm.ai
- Billing flexibility
- Users can add or remove inboxes from the dashboard, with billing adjusted proportionally on the next invoice.Read 30 Sep 2026 · inboxwarm.ai
- Seed network
- InboxWarm says its warmup uses a private network of real seed inboxes rather than bots or recycled accounts.Read 30 Sep 2026 · inboxwarm.ai
- Spam recovery
- Its spam recovery engine marks warmup messages as not spam and moves them to the primary inbox when they land in spam.Read 30 Sep 2026 · inboxwarm.ai
- Target customers
- The company describes its audience as ranging from startups to enterprises, including agencies, SaaS teams, and cold-email teams.Read 30 Sep 2026 · inboxwarm.ai
- Trial terms
- The 10-day trial provides full warmup access for up to one email account without a credit card.Read 30 Sep 2026 · inboxwarm.ai
- Warmup timeline
- InboxWarm says a full warmup typically takes about four to six weeks, with measurable improvement often appearing within two to three weeks.Read 30 Sep 2026 · inboxwarm.ai
Plans and prices
51–100 mailboxes $5 a month monthly 51–100 mailboxes · up to 100 warmup emails/day/inbox Read 30 Sep 2026 · inboxwarm.ai
21–50 mailboxes $6 a month monthly 21–50 mailboxes · up to 100 warmup emails/day/inbox Read 30 Sep 2026 · inboxwarm.ai
6–20 mailboxes $8 a month monthly 6–20 mailboxes · up to 100 warmup emails/day/inbox Read 30 Sep 2026 · inboxwarm.ai
2–5 mailboxes $11 a month monthly 2–5 mailboxes · up to 100 warmup emails/day/inbox Read 30 Sep 2026 · inboxwarm.ai
1 mailbox $15 a month monthly 1 mailbox · up to 100 warmup emails/day/inbox Read 30 Sep 2026 · inboxwarm.ai
Custom & enterprise Priced on request more than 100 inboxes · volume pricing · SLA agreements · dedicated onboarding Read 30 Sep 2026 · inboxwarm.ai
Strong points and limits
Strong points
- Supports Gmail, Outlook, and custom SMTP/IMAP.
- Plans include SPF, DKIM, and DMARC monitoring.
- Every plan includes the public REST API.
- Trial covers one account without a credit card.
Limits
- No free plan is listed.
- The trial lasts 10 days and covers one account.
- Default API limit is 20 requests per minute per key.
Who it suits
InboxWarm.ai suits agencies, SaaS teams, and cold-email teams, as well as other businesses from startups to enterprises. It is aimed at teams warming one or more Gmail, Outlook, or SMTP inboxes.
Verdict
InboxWarm.ai combines automated warmup with inbox-placement tracking, authentication monitoring, and an API. Its stated warmup timeline is about four to six weeks, with measurable improvement often appearing within two to three weeks.
Where Specifiction places it
- Email Warmup Software#10 of 248.2
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