Alternatives to Fastmail

Private offline AI assistant for your emails, files, calendars, and contacts.

All-in-one email, calendar, and contacts with AI-powered smarts.

Free iOS email client for Hotmail, Outlook, Gmail – private and simple.

A radically reimagined email and calendar that puts you in control.

AI secretary for email and calendar that learns your style.

Carly AI: AI email assistant that automates inbox, calendar, and workflows

Proactive AI coworker that automates email, Slack, and calendar tasks — shutting down May 2026

AI email assistant that unifies your inbox and business channels

AI productivity assistant unifying reminders, tasks, calendar, and notes inside WhatsApp, Telegram, Slack, email, and iOS.

AI-powered email, docs, and proactive assistant for speed.

AI email management saving 3-4 hours per week across any email client.

AI email assistant that drafts, organizes, and automates email workflows on top of Gmail and Outlook.

AI executive assistant that runs email, meetings, and follow-ups via text.

AI email assistant that automates inbox management and drafts replies.

Intelligent email client with local meeting recording and AI drafting for Mac.

AI-native email client using Claude 4.6 models to automate triage, writing, and search.

Calendar-driven AI agents that execute work on your schedule

AI-powered email app that turns your inbox into a chat-like collaboration hub.

Spark Mail: AI email client with focus tools for individuals and teams.

AI email assistant for Apple Mail, Gmail, and Outlook

Unified email & note-taking app for iOS with AI-powered tools.

Email-based reminder assistant that follows up for you—no install needed.

End-to-end encrypted email from Switzerland for privacy-first users.

AI Gmail add-on that generates draft replies in your voice for fast, consistent email responses.

AI email drafting add-on that lives inside Gmail, powered by Google Gemini.

AI email assistant that automates your inbox with Claude 4.6 models.

Premium email client with read receipts, collaboration, and real-time sync

Free AI email assistant with compose, summaries, and an automated planner.

Unified email API for AI agents: send, receive, route, and react via one platform.

Email-based AI reading companion for article, YouTube, and PDF summaries