EmailEngine
One REST API and webhook stream for every email provider (IMAP/SMTP, Gmail, Outlook/Microsoft 365), running on your own servers so mailbox data never leaves your infrastructure.
#103 of 506 on our verified revenue leaderboard. Revenue verified by TrustMRR through Stripe (API key), synced 2026-11-04. Source.
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The problem EmailEngine solves
Building two-way email integration is slow and fragile: IMAP connection handling, MIME parsing, OAuth2 token refresh and per-provider API differences take months to get right. EmailEngine handles all of it, so a team can add mailbox sync and sending to its product in days.
About EmailEngine
EmailEngine is a self-hosted email API. It connects to any email account over IMAP/SMTP, the Gmail API or Microsoft Graph and exposes all of them through one REST API, with real-time webhooks for new, changed and deleted messages, bounces and sent mail. Developers use it to sync their users' mailboxes into their own product and send email on the users' behalf, without writing IMAP, MIME or OAuth2 code themselves. Built by Postal Systems, the team behind Nodemailer.
Descriptions are provided by the founder on TrustMRR. Revenue figures are verified.
- Founder
- Andris Reinman
- Founded
- 2020-05-18
- Country
- Estonia
- Payment provider
- Stripe (API key)
- Active subscriptions
- 241
- Pricing
- $1,450 per year, unlimited instances and unlimited email accounts. 14-day free trial on every instance. Custom terms and perpetual licenses on reques
- Who it is for
- SaaS developers and engineering teams building email features (CRMs, helpdesks,
- Audience
- B2B
- Funding
- Bootstrapped
- Website
- emailengine.app
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