Metis Mail vs Serif
Metis Mail
trymetis.email
Serif
serif.aiSide by side
| Figure | Metis Mail | Serif |
|---|---|---|
| Price from | $9.58/mo | $30/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| iOS | — | Yes |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 8 | 6 |
| Spec score · AI Email Assistants | 8.8 (#5) | 8.7 (#6) |
| Company size | LinkedIn places AstraQ Cyber Defence in the 2–10 employee size band and shows four employees. | LinkedIn describes Serif as privately held with 11–50 employees and focused on AI operations for real-estate brokerages. |
| Product | Metis Mail is an open-source email client with an AI agent for Gmail, Microsoft Outlook/Microsoft 365, and Zoho Mail. | Serif places an AI employee in shared addresses such as info@, support@, and billing@ to answer routine email. |
| Rating on G2 | No Metis Mail product rating is shown on G2's October 14, 2026 email-management category page; that page reports 213 products and highlights other vendors. | 5.0 out of 5 from 1 review |
| Security | The service requires TOTP two-factor authentication before a mailbox is reachable, supports password or magic-link sign-in, and enforces per-workspace data isolation. | Serif states that it is SOC 2 Type 2, GDPR, and HIPAA compliant, and that emails are not used to train general AI models or stored on its servers. |
| Security controls | TOTP two-factor authentication is required before mailbox access, and the service supports password or magic-link sign-in and encrypted tokens. | Serif states that emails are not used to train general models, are not stored on its servers, and that learned data is encrypted at rest. |
| What it does | Metis Mail is an open-source AI email client that combines multiple Gmail, Microsoft 365, Outlook.com, Zoho Mail, and IMAP accounts in one workspace. | Serif describes itself as an AI workflow platform that automates email and document work for small businesses and operations teams. |
Plans
Metis Mail
- Open sourceFree
- Cloud Pro$12 a month
- Workspace$20 a month
- Cloud Pro (annual)$115 a year
- Cloud Pro annual$115 a year
- Workspace (annual)$192 a year
- Workspace annual$192 a year
- EnterprisePriced on request
Serif
- Lite$30 a month
- Standard$50 a month
- Pro$200 a month
- Team$50 a month
- EnterprisePriced on request
- FreeFree
In their own words
Metis Mail
Metis Mail has no write-up on Specifiction yet; its figures are above.
Serif
Serif places an AI employee in shared email addresses such as info@, support@ and billing@ to handle routine messages. It connects to Google Workspace or Microsoft 365, or can work with an address of its own. The assistant can qualify and route inquiries, answer common questions, collect paperwork, send quotes and follow up on unpaid invoices. Ambiguous or sensitive messages are escalated to the team, and users can approve replies before allowing independent operation. The shared inbox page offers $100 in free credits without a credit card, and each plan includes a 7-day free trial with full access. Listed plans include Lite at $30 a month, Standard at $50 a month, Pro at $200 a month, and Team at $50 a month per user; each is billed monthly. Serif says it is SOC 2 Type 2, GDPR and HIPAA compliant, and that emails are neither used to train general AI models nor stored on its servers. Apps are listed for web, macOS, Windows and iOS; Android is coming soon.