MailCopilot

Free plan LinuxMacWindows

What MailCopilot is

MailCopilot is a desktop email client for Linux, macOS, and Windows, with a unified inbox for managing multiple accounts. It supports IMAP/SMTP connections and OAuth sign-in for Gmail and Outlook. Inbox tools include search, bulk actions, snooze, follow-up reminders, templates, mail rules, and offline sync; users can also schedule messages and use calendar tools.

Its AI features cover email triage, suggested replies, thread summaries, attachment reading, web search, and persistent memory. It supports Anthropic Claude, Google Gemini, OpenAI-compatible services, and local models through OpenAI-compatible endpoints. Users supply their own API key and are responsible for provider charges. AI is disabled by default, and email data is sent to a provider only with consent and on request. AI actions require confirmation and are recorded in an exportable audit log; internet access is off by default.

The privacy policy says data is stored locally and that MailCopilot does not run cloud servers to store emails, contacts, or settings. The site describes the app as free and open source under AGPL-3.0. Native iOS and Android apps are listed as planned on the roadmap.

Who it suits

MailCopilot suits people who want a desktop email workflow across Linux, macOS, or Windows, with offline access, scheduling, and calendar tools. It may also suit users who want AI assistance with explicit controls and are prepared to provide and pay for their own AI provider key.

What it does well

Unified inbox, search, bulk actions, snooze, and mail rules.
Offline sync and scheduled sending are included.
AI can summarize threads and read attachments.
Supports IMAP/SMTP and OAuth for Gmail and Outlook.
Free and open source under AGPL-3.0.
AI actions require confirmation and appear in an exportable audit log.

What to know first

Users must supply an AI provider API key and cover its charges.
Native iOS and Android apps are listed as planned.

Plans

Plan	Billed and limits	Price
Free	Free · Linux · Windows · macOS · AGPL-3.0 open source	Free

As mailcopilot.io lists them, read 9 Oct 2026. The maker's own page has the final word.

Getting started

Visit the MailCopilot website.
Choose the desktop version for Linux, macOS, or Windows.
Connect an account through IMAP/SMTP or use OAuth sign-in for Gmail or Outlook.
If you want AI features, provide an API key for a supported provider or compatible local model.

Verdict

Choose MailCopilot if you want a free desktop email client with offline sync, scheduling, calendar tools, and optional AI features across Linux, macOS, or Windows. Its AI functions require your own provider key, and native mobile apps are still listed as planned.

Questions

Is MailCopilot free?

Yes. Its listed Free plan costs nothing.

Which platforms does it support?

MailCopilot is listed for Linux, macOS, and Windows desktop use. Native iOS and Android apps are listed as planned.

How can I connect an email account?

You can connect through IMAP/SMTP or use OAuth sign-in for Gmail and Outlook.

Which AI providers does it support?

It supports Anthropic Claude, Google Gemini, OpenAI-compatible services, and local models through OpenAI-compatible endpoints. Users bring their own API key and are responsible for provider charges.

Where is user data stored?

The privacy policy says user data is stored locally and that MailCopilot does not operate cloud servers for emails, contacts, or settings.

Is MailCopilot open source?

The Free plan lists MailCopilot as open source under AGPL-3.0.

Facts from MailCopilot's own pages

AI controls: AI actions require explicit confirmation, internet access is off by default, and AI actions are recorded in an exportable audit log. · mailcopilot.io, 9 Oct 2026
AI costs: Users who use their own AI provider API key are responsible for that provider's charges; MailCopilot provides daily and monthly budget controls. · docs.mailcopilot.io, 9 Oct 2026
AI features: Its AI features include email triage, smart replies, thread summaries, attachment reading, web search, and persistent memory. · mailcopilot.io, 9 Oct 2026
AI privacy: The privacy policy says the AI assistant is disabled by default and email data is sent to an AI provider only with explicit consent and on request. · docs.mailcopilot.io, 9 Oct 2026
AI providers: It supports Anthropic Claude, OpenAI-compatible services, Google Gemini, and local models through OpenAI-compatible endpoints; users bring their own API key. · mailcopilot.io, 9 Oct 2026
App coverage: desktop · mailcopilot.io, 24 Sept 2026
Calendar tools: Yes · mailcopilot.io, 24 Sept 2026
Data storage: The privacy policy says user data is stored locally and MailCopilot does not operate cloud servers to store emails, contacts, or settings. · docs.mailcopilot.io, 9 Oct 2026
Email connections: Users can connect accounts with IMAP/SMTP or use OAuth sign-in for Gmail and Outlook. · mailcopilot.io, 9 Oct 2026
Free plan: Yes · mailcopilot.io, 24 Sept 2026
Inbox tools: Features include a unified inbox, search, bulk actions, snooze, follow-up reminders, templates, mail rules, and offline sync. · mailcopilot.io, 9 Oct 2026
Integrations: MailCopilot supports MCP client connections to tools such as Obsidian, task managers, and calendars, and can expose email tools to external agents. · mailcopilot.io, 9 Oct 2026
Mobile status: Native iOS and Android apps are listed as planned on the roadmap. · mailcopilot.io, 9 Oct 2026
Offline access: Yes · mailcopilot.io, 24 Sept 2026
Product: MailCopilot is an AI-native desktop email client for managing email. · mailcopilot.io, 9 Oct 2026
Security: The site says credentials are secured through the OS keychain, HTML email is sandboxed and sanitized, and TLS certificate pinning is supported. · mailcopilot.io, 9 Oct 2026
Scheduled sending: Yes · mailcopilot.io, 24 Sept 2026
Support: The site links to a Telegram channel and GitHub repository for community contact and project information. · mailcopilot.io, 9 Oct 2026
Unified inbox: Yes · mailcopilot.io, 24 Sept 2026

Where MailCopilot stands on Freedom251

AI Email Assistants#6 of 46
Email clients#29 of 142