Mailspring

Mailspring is an open-source desktop email client for macOS, Windows and Linux. It combines multiple accounts in a unified inbox, with search, signatures and translation. Optional Pro features support email follow-up and tracking.

✨ Key Features

• Unified inbox — Manage messages from multiple accounts.
• Search — Search across connected mailboxes.
• Compose — Use signatures, translation and spelling checks.
• Pro follow-up — Use reminders, templates and send-later features.
• Pro tracking — Access read receipts, link tracking and mailbox insights.

💳 Pricing

• Free client — Core email features are free; some Pro functions can be tested with limited weekly use.
• Pro — $8/month for premium email workflow features and expanded usage. Read receipts and other Pro features are not an unlimited free entitlement.

⚖️ Alternatives Compared

🎯 Use Cases

• Multiple accounts — Read work and personal messages together.
• Follow-up — Use Pro reminders and templates for repeat correspondence.
• Mailbox search — Find messages across accounts.
• Cross-platform email — Use a desktop client on supported operating systems.