Ultra‑light, Blazing‑fast & Privacy‑First
Email Client
Cold start ≤1.5s · Sync 100 emails ≤3s · Idle memory ≤80MB · Local instant search
Built for power users with massive inboxes
Available for Windows, macOS, and Linux
Engineered Performance Targets
Designed for speed, optimized for efficiency
All metrics are target values under continuous optimization. Actual performance may vary based on hardware and email volume.
Built for Performance
Lightning fast, privacy-first email client.
Speed
Instant Local Search
Index millions of emails, query in <50ms.
Ultra-light Footprint
Idle memory ≤80MB with optimized threads.
Optimized Sync
Sync 100 recent emails in ≤3s.
Productivity
Multi-Account Support
Gmail, Outlook & custom IMAP/SMTP.
Rich Composer
Attachments, formatting, autosave drafts.
Folder Management
Efficient organization & filtering.
Privacy
Offline & Private
All data stored locally in SQLite.
No Telemetry
Zero tracking or analytics.
Secure Tokens (Planned)
Platform encryption for OAuth tokens.
Reliability
Background Sync
Stay up-to-date with minimal resource use.
Robust Index
SQLite-based high performance store.
Attachment Handling
Fast uploads & inline previews.
Lightning-Fast Search
Local indexing enables millisecond queries without remote server delays.
Q4 Performance Review
Your quarterly review is ready...
Weekly Tech Digest #42
Top stories this week in technology...
Ticket #1234 Resolved
Your support ticket has been resolved...
Order Confirmation #5678
Thank you for your purchase...
Account Statement Available
Your monthly statement is now available...
💡 Interactive demo showing local indexed search response time
Instant Results
Type and search, <50ms response
Full-Text Index
Sender, subject, body coverage
Fully Offline
No network dependency, private
Privacy & Security
Your data belongs to you. Privacy protection is our top priority.
Local SQLite Storage
Email metadata and content stored locally. Fully offline capable, no cloud exposure risk.
Zero Telemetry
No usage data collection, no behavior tracking, no analytics reporting.
OS Keychain Protection
Passwords & OAuth2 tokens stored in OS keychain (Windows Credential Manager / macOS Keychain) with system-level encryption.
OAuth2 Secure Auth
Gmail & Outlook OAuth2 support. Tokens auto-chunked to bypass platform length limits.
Open Source Transparency
MIT licensed open source. All code auditable, community-driven, no hidden backdoors.
Direct IMAP/SMTP
Direct connection to email servers, no intermediary proxies, transparent communication.
✅ Implemented: Passwords and OAuth2 tokens migrated to OS keychain, no longer stored in app database.
📋 Current: Email content and attachments stored locally in plaintext. Future versions will implement AES-GCM encryption with user key.
How ColiMail Compares
See how ColiMail outperforms traditional email clients on key metrics.
| Metric | ColiMail | Thunderbird | Outlook | Apple Mail |
|---|---|---|---|---|
| Cold Start Time | ≤1.5s | ~8s | ~5s | ~3s |
| Idle Memory | ≤80MB | ~400MB | ~500MB | ~200MB |
| Package Size | ≤30MB | ~150MB | ~2GB | Built-in |
| Local Search | <50ms | ~500ms | ~200ms | ~100ms |
| Sync 100 Emails | ≤3s | ~10s | ~8s | ~5s |
| Multi-Account | ✓ | ✓ | ✓ | ✓ |
| OAuth2 Support | ✓ | ✓ | ✓ | ✓ |
| No Telemetry | ✓ | ✓ | ✗ | ✗ |
| Cross-Platform | Win/Mac/Linux | Win/Mac/Linux | Win/Mac | Mac only |
Cold Start Time
Idle Memory
Package Size
Local Search
Sync 100 Emails
Multi-Account
OAuth2 Support
No Telemetry
Cross-Platform
Benchmarks measured on Windows 11, i7-12700K, 16GB RAM. Results may vary by system configuration.
Performance Benchmarks
Real-world performance comparison across key metrics.
Performance Benchmark Comparison
ColiMail's advantage in key performance metrics
Benchmarks are updated with each major release to reflect the latest optimizations.
Version History & Roadmap
Track our progress and see what's coming next.
Released Versions
- CMVH email signing with EIP-712 cryptographic signatures
- WalletConnect integration with QR code mobile wallet support
- ENS name resolution with 3-layer caching (90%+ hit rate)
- wACT cryptocurrency reward pool for emails
- Wallet security with session timeout & transaction confirmation
- One-click log export as ZIP for debugging
- Auto-reveal exported logs in file explorer
- Enhanced error handling with user-friendly messages
- AES-256-GCM local data encryption for email content
- Argon2 key derivation with zero-knowledge architecture
- Master password unlock dialog on startup
- Privacy & visibility settings page
- Auto-update system with GitHub Releases integration
- Cryptographic signature verification for updates
- One-click download and install with auto-restart
- Settings dialog "About" section with version info
- Fixed Google OAuth desktop flow with deep link protocol
- Resolved authentication deadlock in callback handling
- Enhanced OAuth callback page with success indicators
Planned Features
- Multi-language UI support (i18n framework)
- Calendar integration (ICS parsing & event management)
- Advanced search index (SQLite FTS or Tantivy)
- Rule engine (filters, auto-tag, auto-move)
- Subscription/billing UI & entitlement checks
- Cross-device sync for flags, drafts, and rules
- Plugin system for scriptable automations
- Smart categorization & ML-assisted triage
- Enhanced collaboration features
Want to see detailed changes? Check out the full changelog.
View ChangelogStay Updated
Get notified about new releases and performance benchmarks.
Get Started
v1.0.0Download ColiMail for your platform. Auto-detects your operating system.
Released on: Nov 24, 2025 · View Changelog
Package Checksums & Details
Alternative Downloads