Maillifier

7.3easy start · #8of 46
in AI Email Assistants

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

Runs on self-hosted, Web.

Maillifier is ranked #8 of 46 in AI email assistants on The Geeks Club. It runs on Self-hosted, Web. There is a free plan. A free trial is offered.

Maillifier plans and pricing

All plans

Free Free Open-source Google Apps Script project; requires your own Google account with Gmail access and Gemini API key maillifier.com · 8 Oct 2026

Compared on AI email assistants

Free plan: Yes
Inbox triage: Yes
AI reply drafting: Yes
Automatic sending: No
Email platforms: gmail

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The record

Purpose: Maillifier processes emails forwarded to a dedicated Gmail account and generates AI-drafted replies using Google Gemini.
Processing time: The maker says forwarded emails typically receive an AI-drafted reply within 1–5 minutes.
Personalization: Users can set personal rules for future drafts with the #SET_USER_PROMPT email command.
Knowledge base: Users can add company information and tone guidelines to a Google Doc used as the Knowledge Base.
Access control: An administrator can whitelist users and add or remove their access through email commands.
Attachments: The home page lists support for PDF, DOCX, XLSX, and CSV attachments, charts, and more.
Language detection: The home page says Maillifier detects the sender’s language and replies in that language.
Integrations: The installed script uses Google Apps Script, Gmail, Google Drive, Google Docs, Google Sheets, and the Google Gemini API.
Data location: The maker says the installed script processes data within the user's Google account and sends email content to Google's Gemini API for AI processing.
Email retention: The privacy policy says processed emails are permanently deleted after a response is generated under its Zero-Log architecture.
Security: The privacy policy lists split-scope installation, HTTPS/TLS communication, encrypted-by-Google Script Properties for Gemini API keys, whitelist access control, and publicly auditable source code.
Setup requirements: The terms require a Google account with Gmail access, and users are responsible for obtaining and managing their own Gemini API key.
Support: The maker provides support at [email protected] and accepts questions or issues through its GitHub repository.
Notable limits: The repository troubleshooting section says Gemini API free-tier rate limits may be exceeded, in which case users can wait or set up Google Cloud billing.
Price from: Free

Where it ranks on The Geeks Club

Best AI Email Assistants in 2026#8 of 46
Best AI Email Writing Tools in 2026#9 of 28

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Sources

github.com/maillifier/maillifier· checked 8 Oct 2026
maillifier.com· checked 8 Oct 2026
maillifier.com/privacy.html· checked 8 Oct 2026
maillifier.com/terms.html· checked 8 Oct 2026