MailFlow

7.4easy start · #40of 143
in Email clients

Free to practise onyes
Free trialno
Well documentedyes
Runs where you workno

Runs on self-hosted, Web. Paid plans from $500/mo.

MailFlow is ranked #40 of 143 in email clients on The Geeks Club. It runs on Self-hosted, Web. There is a free plan. Paid plans start at $500/mo.

MailFlow plans and pricing

All plans

Personal & Open Source Free Free forever Non-commercial use · all features · unlimited accounts · community support mailflow.sh · 8 Oct 2026

Business Use $500/mo One-time per installation All features included · No AGPL obligations · Modify and deploy privately · Direct email for business enquiries mailflow.sh · 23 Sept 2026

Business Use $500 once $500 per installation · one-time Commercial deployments · all features · no AGPL obligations · modify and deploy privately mailflow.sh · 8 Oct 2026

Compared on email clients

Free plan: Yes
App coverage: web
Unified inbox: Yes
Offline access: No
Scheduled sending: No
Calendar tools: No

Best MailFlow alternatives

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The record

Product: MailFlow is a self-hosted, open-source webmail client that combines email accounts in a browser interface.
Supported email: It supports Gmail, iCloud Mail, Outlook, Fastmail, and any IMAP server.
Search and sync: Full-text search covers connected accounts, and new mail syncs via WebSocket in real time.
AI assistant: The assistant connects to OpenAI-compatible providers, including local models or cloud APIs, to summarize threads, draft replies, and answer questions about messages.
Integration: MailFlow can create Todoist tasks from emails and link back to the original message.
Other features: It includes inbox rules, automatic email categories, spam feedback, one-click newsletter unsubscribe, rich-text composition, and conversation threads.
Deployment: MailFlow runs in Docker Compose; its setup instructions require Docker Engine 24+ and Docker Compose v2.
Security: The site says stored email credentials are encrypted at rest with AES-256 and lists bcrypt password hashing, TOTP two-factor authentication, rate-limited authentication, and sanitized email HTML.
Data control: MailFlow runs on the user's own infrastructure, and the site says email is not routed through third-party servers.
Support: The free personal plan includes community support; the commercial license includes direct email for questions, feedback, and business enquiries.
Intended users: The site describes the free plan as suitable for personal, family, or other non-commercial use, and offers a commercial license for businesses and managed hosting.
Hosted offering: The site says a fully hosted version is coming soon and invites visitors to join its waitlist.
Native apps: The roadmap lists native iOS and Android apps and desktop apps for Windows, macOS, and Linux as future work.
Price from: $500/mo

Where it ranks on The Geeks Club

Best Email Clients in 2026#40 of 143

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Sources

mailflow.sh· checked 8 Oct 2026