| What it does | Free, open source email client with mail, calendar, contacts and AI
| Transactional email API and SMTP for password resets, receipts and alerts
|
|---|
| Stage | Not given
| Not given
|
|---|
| Founded | Not given
| Not given
|
|---|
| Based in | Not given
| US
|
|---|
| Pricing model | Open source
| Freemium
|
|---|
| Pricing | Not given
| Free: 3,000 emails/month, 100/day, 3 domains. Pay as you go: $15/month with 20,000 emails included, then $0.70 per 1,000 from 20,000-100,000, $0.50 per 1,000 from 100,000-1 million, $0.30 per 1,000 above 1 million. Dedicated server: $299/month with 250,000 emails included, then $0.40 per 1,000.
|
|---|
| Key features | - Mail over IMAP or POP3 with search by sender, date and attachments
- Calendar with CalDAV sync in day, week, month and year views
- Contacts with CardDAV sync with email, phone, company and birthday fields
- Read receipts showing Delivered, Opened or Bounced status
- AI summaries, replies and questions using your own API key
- Message and reply translation between languages
- Custom signature for each mailbox
- Built-in settings for Gmail, iCloud, Outlook, Yahoo, Fastmail, Zoho, GMX, Yandex and Proton Bridge
- Open source template for building branded mail clients
| - REST API and SDKs for Node, Python, Go, PHP and Ruby
- SMTP relay at smtp.groundmail.dev port 587
- Event-triggered automations
- Inbound email and reply handling
- Versioned email templates with live preview
- Spam checks and blocklist monitoring
- DMARC monitoring
- Dedicated IPs and servers
- Hosted test inbox for CI
- Tenants for serving multiple customers
|
|---|
| What makes it different | - Free and open source under MIT licence with no restrictions on use, modification or resale
- Works with any IMAP or POP3 mailbox including Gmail, iCloud, Outlook and others
- Calendar and contacts integrated in the same window with mail
- Bring your own AI from Anthropic, OpenAI, Google, xAI or Perplexity
- Build your own branded desktop app by customising the open source template
| - 4.6 second median delivery time
- Operated by the team that runs the mail servers
- Transactional mail kept separate from marketing mail
- 99.99% sending uptime
- No setup required for AI coding tools
|
|---|
| Community votes | 0 | 0 |
|---|
| DR (Domain Rating by Ahrefs) | 11 ▼ −1 (down) since last check | 24 ● no change since last check |
|---|
| Trust Flow (Majestic) | 2 | 6 |
|---|
| Citation Flow (Majestic) | 28 | 30 |
|---|
| Referring domains (Majestic) | 41 | 38 |
|---|
CitrusMail
Groundmail