MailFlow
MailFlow: Classifies IMAP email and drafts replies while leaving sending in your hands. Ranked #16 of 46 in AI Email Assistants by our editors (7.1/10); pricing: Free plan; best for self-hosted automated IMAP drafting.
At a glance
- Editor score7.1 / 10
- PricingFree plan
- Best forSelf-hosted automated IMAP drafting
- Free planYes
- Paid from$12/mo
- Inbox triageYes
- Facts checked19 Sep 2026
Where it wins
- Classifies incoming email into IMAP folders automatically
- Saves AI-generated reply drafts to IMAP Drafts without auto-sending
- Connects to Gmail, Microsoft 365, generic IMAP, and several LLM providers
Where it doesn't
- Self-hosting requires Docker deployment
- Commercial SaaS use requires a commercial license
- Does not document thread summaries or follow-up task management
Our verdict on MailFlow
MailFlow is an open-source AI email assistant for individuals and teams who want inbox organization and reply drafting while keeping control over deployment. It classifies incoming messages into IMAP folders and saves AI-generated replies in the mailbox’s Drafts folder. Because drafts are never sent automatically, it suits people who want automation to prepare work for review rather than send messages on their behalf.
Its mailbox coverage gives it a flexible fit: users can connect Gmail or Microsoft 365 through OAuth2, or use a generic IMAP mailbox. For language models, MailFlow supports local and hosted providers, including Ollama, OpenAI, Anthropic, Gemini, vLLM, LM Studio, and OpenAI-compatible endpoints. Docker-based self-hosting is available, alongside a web dashboard with mailbox, cycle history, statistics, and billing views. The deployment options include single-tenant self-hosting and multi-tenant SaaS, so teams can choose between operating it themselves and a commercial service.
The published plans show a Free option for open-source self-hosted deployment and a Paid option listed at $12 per month for commercial SaaS; commercial SaaS use requires a commercial license. The repository does not provide detailed terms for those plans, so buyers should check the applicable license and service terms before choosing SaaS. MailFlow’s documented scope centers on classification and draft creation: thread summaries and follow-up task management are not documented. Choose it if self-hosted control, broad IMAP support, and human-reviewed drafts are priorities. Look elsewhere if you need automatic sending, documented summaries, or follow-up management as part of the assistant.
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MailFlow pricing
All 2 MailFlow plans and prices →
MailFlow fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $12/mo |
| Inbox triage | Yes |
| AI reply drafting | Yes |
| Automatic sending | No |
| Thread summaries | Not verified |
| Follow-up actions | Not verified |
| Email platforms | Not verified |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Integrations | 10 integrations: Gmail, Microsoft 365, IMAP, Ollama, OpenAI, Anthropic … |
| Pricing | Free plan (source) |
| Website | github.com |
| Facts checked | 19 Sep 2026 |
MailFlow integrations
MailFlow lists 10 integrations on its own site.
- Gmail
- Microsoft 365
- IMAP
- Ollama
- OpenAI
- Anthropic
- Gemini
- vLLM
- LM Studio
- OpenAI-compatible endpoints
Alternatives to MailFlow
- Spark +AIA broad AI email toolkit across four platforms, with paid AI features starting at $10 per user monthly.9.2
- Superhuman GoA cross-platform AI assistant with email help, connected apps, and custom automations.8.8
- Mailbutler Smart AssistantA broad email toolkit with AI assistance on Smart and Business plans.8.6
See all MailFlow alternatives →
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Featured on iTechGuides
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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