ChainMail
Two paid desktop clients, very different approaches
Mailbird is a well-known Windows desktop email client that supports Gmail, Outlook.com, Yahoo, IMAP, and POP3. It's been around since 2012 and has a large user base. It connects to Gmail over IMAP, like most traditional email clients.
ChainMail is newer, smaller, and laser-focused on one thing: being the best desktop client for Gmail specifically. Instead of IMAP, it connects through Google's official Gmail API, which means labels, search, and sync all work the way Gmail actually works — not through a 40-year-old protocol translation layer.
Both are paid products. Both run on Windows. The question is which one gives Gmail users a better experience.
Where ChainMail wins
Native Gmail API vs IMAP
This is the fundamental difference. Mailbird connects to Gmail via IMAP, which means Gmail labels get mapped to folders. A message with three labels appears in three "folders." Search is limited to what IMAP supports. Sent messages sometimes duplicate. Draft sync can be unreliable.
ChainMail uses Google's Gmail API directly. Labels work like labels. Search supports the full Gmail query syntax (from:boss has:attachment larger:5M after:2026/01/01). Read/unread state, categories, and importance markers all sync correctly because ChainMail speaks Gmail's native language.
Privacy-first architecture
ChainMail is local-first. Your emails are fetched directly from Google's servers to your machine. No intermediate servers. No analytics. No telemetry. Your data never touches ChainMail's infrastructure.
Mailbird routes some functionality through their servers and includes third-party integrations (Slack, WhatsApp, Facebook, etc.) built into the sidebar. If privacy is a priority, ChainMail's architecture is simpler and more transparent.
AI email drafting (bring your own key)
ChainMail has built-in AI drafting that works with six providers (OpenAI, Anthropic, Google Gemini, Mistral, and more). You bring your own API key, so your email content never passes through any third-party service. Mailbird doesn't have native AI drafting — you'd need to copy-paste from ChatGPT or use a separate tool.
Smart templates with variables
ChainMail's template system supports smart variables (recipient name, date, custom fields) and file attachments. Mailbird has a "Quick Action Bar" for canned responses, but it doesn't support variable substitution or template-attached files.
Simpler, more affordable pricing
ChainMail starts at $1/month (or $10/year, or $35 lifetime). Mailbird's personal plan is $2.28/month billed annually, or $49.50 for lifetime. For Gmail-only users, ChainMail offers more Gmail-specific features at a lower price.
Where Mailbird wins
Multi-account, multi-provider support
If you manage Gmail, Outlook.com, Yahoo, and a work IMAP server all in one inbox, Mailbird handles that. It supports unified inbox across providers. ChainMail is Gmail-only — one account per installation.
App integrations
Mailbird has built-in integrations with Slack, WhatsApp, Google Calendar, Todoist, Asana, and more. The sidebar lets you use these apps without switching windows. ChainMail is focused purely on email — no sidebar apps.
More mature product
Mailbird has been around since 2012 with millions of downloads. It's a mature, well-tested product with a large support community. ChainMail is newer and still in beta. If you want a product with years of polish, Mailbird has the track record.
Snooze and scheduled send
Mailbird supports snoozing emails and scheduling sends natively. ChainMail doesn't have these features yet (though they're on the roadmap).
| Feature | Mailbird | ChainMail |
|---|---|---|
| Gmail API integration | ✕ IMAP only | ✓ Native Gmail API |
| Gmail labels (true labels) | ✕ Mapped as folders | ✓ |
| Gmail search operators | Limited (IMAP search) | ✓ Full Gmail syntax |
| 3-pane layout | ✓ | ✓ |
| Non-threaded message view | ✕ Threaded only | ✓ |
| AI email drafting | ✕ | ✓ BYOK, 6 providers |
| Smart templates with variables | Basic (Quick Actions) | ✓ Variables + attachments |
| Multiple email providers | ✓ IMAP, POP3, Exchange | ✕ Gmail only |
| App integrations (Slack, etc.) | ✓ Built-in sidebar | ✕ |
| Snooze & scheduled send | ✓ | ✕ (planned) |
| Platforms | Windows | Windows (Mac planned) |
| Price (monthly) | $2.28/mo (annual) | $1/mo |
| Price (lifetime) | $49.50 | $35 |
| Privacy (no telemetry) | Includes integrations | ✓ Local-first, no tracking |
| Dark mode | ✓ | ✓ |
Who should pick ChainMail?
- Gmail-only users — if Gmail is your only email, ChainMail's API integration gives you a cleaner experience than Mailbird's IMAP connection
- Privacy-conscious users — ChainMail's local-first architecture with no third-party integrations means less data exposure
- People who hate threaded email — ChainMail supports non-threaded view where every message is its own row; Mailbird forces threaded conversations
- Budget-conscious users — ChainMail is cheaper at every tier ($1/mo vs $2.28/mo, $35 vs $49.50 lifetime)
- Users who want AI drafting — built-in, private, bring-your-own-key AI without leaving the email client
Who should stick with Mailbird?
- Multi-provider users — if you need Gmail + Outlook + Yahoo in one unified inbox
- Users who want app integrations — if having Slack, WhatsApp, and calendar in your email sidebar matters to you
- Users who need snooze and scheduled send — Mailbird has these today; ChainMail doesn't yet
- Users who want a mature, established product — Mailbird has a decade of development and a large community
Frequently Asked Questions
Is ChainMail cheaper than Mailbird?
Yes. ChainMail starts at $1/month or $35 for a lifetime license. Mailbird starts at $2.28/month (billed annually) or $49.50 for lifetime. Both offer free trials.
Does Mailbird use the Gmail API?
No. Mailbird connects to Gmail via IMAP, which can cause issues with labels being displayed as folders, limited search, and occasional sync problems. ChainMail uses Google's native Gmail API for a more accurate Gmail experience.
Can I switch from Mailbird to ChainMail?
Yes, and there's nothing to migrate. Both clients connect to Gmail's servers, so all your emails are already there. Just sign in with your Google account in ChainMail and everything syncs automatically.
Does ChainMail support multiple email accounts like Mailbird?
Currently, ChainMail supports one Gmail account per installation. Multi-account support is on the roadmap. If you need multiple non-Gmail accounts in one app, Mailbird is the better choice today.
Which is more private, Mailbird or ChainMail?
ChainMail is local-first with no telemetry and no third-party integrations. Your email data goes directly from Google's servers to your machine. Mailbird includes built-in integrations with services like Slack, WhatsApp, and Facebook, which means more third-party connections.