Curier

Curier is an open-source email client for macOS that turns the inbox into a skimmable feed.

Curier is an open-source email client for macOS that converts newsletters and subscriptions into a customizable feed timeline. Built with Tauri, Rust, and React, it stores messages in a local SQLite database for instant search and offline access. Users connect Gmail accounts using personal Google Cloud OAuth credentials and store secrets securely in the macOS Keychain. The application sanitizes HTML email in Rust, blocks remote tracking pixels by default, and operates entirely client-side without telemetry or intermediary servers. It is designed for privacy-conscious macOS users who want to separate newsletters from critical mail.

Curier at a glance

Best for: Product manager, Software engineer
Runs on: macOS, Web
Pricing: Free, open source under the MIT license
Released: October 2026
Category: AI productivity tool
Website: iamflowz.github.io

Key features

Groups newsletters and subscriptions into feed columns
Opens accounts, feeds, messages, and drafts as tabs
Applies custom rules and tags to sort messages
Caches messages locally in a SQLite database
Sanitizes HTML mail and blocks remote tracking pixels
Stores credentials securely in the macOS Keychain

Use it for

Skimming newsletters and subscriptions as a timeline
Managing multiple email accounts in tabbed views
Reading emails offline using a local SQLite cache
Isolating receipts and newsletters from priority mail

Alternatives to Curier

bytemail — Connects directly to email providers without using intermediary servers.
Klar — Runs fully on the Mac without sending messages to the cloud.
Umbra Mail — It keeps mail private with no tracking and optional local AI.
Cinch – Reminders & Tasks — Works directly with existing Apple lists with zero third-party servers.
Univer — Integrates high-performance office tools and AI agents into your application.
Ida — Controls your Mac and apps using voice or text commands with one key.
Mermaid — Executes tasks on a Mac locally using existing applications via text commands.
Google Workspace MCP — Connects twelve Google Workspace services to AI assistants through one open source server.
ShareCube — Publish agent artifacts to URLs for team annotation and editing.
Buffer — All data stays locally on your device with no accounts or telemetry.
Macaroni — Tracks folder changes made by AI agents without writing to files.
Udon — Manages your files and apps locally with an optional AI sysadmin.

All Curier alternatives