Your Work Lives Beyond Email:
Unify Everything in One Inbox
Mailspring is a solid free email client, but your workflow spans more than email.
HeyRobyn brings email + Slack + GitHub notifications into one Mac-native app with AI built in.
AI-powered. Mac-native. Built for power users who need more than email.
Why Mailspring Users Are Upgrading
More Than Just Email
Mailspring handles email well, but your work lives in Slack, GitHub, and more. HeyRobyn unifies Slack DMs, GitHub PRs and issues, WhatsApp, and Telegram alongside your inbox.
AI-Powered Intelligence
Mailspring offers basic productivity features. HeyRobyn uses on-device AI to draft replies, summarize threads, triage notifications across all your channels, and surface what matters most.
True Mac-Native Experience
Mailspring is built on Electron, which means a web app in a wrapper. HeyRobyn is written in Swift + AppKit — blazing fast launch, 70% less RAM, and native macOS integration out of the box.
HeyRobyn vs Mailspring: Feature Comparison
| Feature | HeyRobyn | Mailspring |
|---|---|---|
| Individual Plan Price | $25/mo | Free / $8/mo Pro |
| Email (Gmail, Outlook, IMAP) | ✅ | ✅ |
| Slack Integration | ✅ Full DMs & channels | ❌ |
| GitHub Notifications | ✅ PRs, issues, reviews | ❌ |
| WhatsApp / Telegram | ✅ Unified messaging | ❌ |
| AI Writing Assistant | ✅ Cross-platform AI | ❌ |
| Open Source | ❌ Proprietary | ✅ GPL licensed |
| Cross-Platform (Win / Linux) | ❌ Mac only | ✅ Mac, Windows, Linux |
| Built-in Translation | ❌ | ✅ |
| Native Mac App | ✅ Swift + AppKit | ⚠️ Electron |
| Unified Inbox (Multiple Accounts) | ✅ Email + 5 platforms | ✅ Email only |
| Keyboard Shortcuts | ✅ Vim-style + custom | ✅ Custom |
| Snooze & Reminders | ✅ | ✅ Pro only |
| Read Receipts & Link Tracking | ✅ | ✅ Pro only |
Questions from Mailspring Users
Mailspring is free — why should I pay $25/mo for HeyRobyn?
Mailspring is a great free email client, but it only handles email. HeyRobyn replaces 5+ apps in one window: your email client + Slack desktop + GitHub notifications + WhatsApp/Telegram desktop apps. Most power users save time and mental overhead by consolidating everything. If your workflow spans multiple communication tools, the cost pays for itself in focus time saved.
Mailspring is open source — is HeyRobyn?
No, HeyRobyn is proprietary. Mailspring's open-source roots (from Nylas Mail) are admirable and give you transparency into the code. HeyRobyn takes a different approach: we prioritize a polished, Mac-native experience with on-device AI and deep platform integrations that go well beyond what an email-only client can offer. Your data stays 100% on your device — no cloud storage, no telemetry.
I use Mailspring on Windows and Linux too — can HeyRobyn replace it?
HeyRobyn is Mac-only by design. We build exclusively for macOS using Swift + AppKit to deliver the fastest, most native experience possible. If you work primarily on a Mac and want to stop tab-switching between email, Slack, and GitHub, HeyRobyn is the upgrade. For your non-Mac machines, Mailspring remains a solid choice.
How does HeyRobyn compare to Mailspring's search and performance?
Mailspring has good search for email. HeyRobyn takes this further with universal search across all your channels — find that Slack thread, GitHub issue, or email from the same search bar. Performance-wise, Mailspring uses Electron (a web browser wrapper), while HeyRobyn is built in native Swift. That means HeyRobyn launches in under 1 second, uses significantly less RAM, and feels like a true macOS citizen.
Can I migrate my Mailspring accounts to HeyRobyn?
Yes! HeyRobyn uses standard email protocols (IMAP/OAuth), so your email accounts connect in under 2 minutes. Then you add your Slack workspace, GitHub account, and messaging apps to complete your unified inbox. No data migration needed — your emails stay on your mail server, and HeyRobyn syncs directly.
Upgrade from Email-Only to Your Entire Workflow
Join 17+ Mac power users on the waitlist. Early access launching April 2026.
Mac-native. AI-powered. $25/mo Pro.
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