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Looking for a Postbox alternative after the eM Client acquisition? HeyRobyn is a Mac-native unified inbox with AI phone assistant, developer tools, and 100% on-device privacy — all for $25/mo flat.
⚡ Postbox News (2026)
Postbox has been acquired by eM Client. Sales, development, and support have ended (last version: 7.0.65). Many users are looking for a modern Mac-native alternative — HeyRobyn is built from the ground up for macOS with unified inbox + AI phone assistant + developer tools.
Postbox was focused solely on email productivity. HeyRobyn unifies email, Slack, GitHub, Linear, Jira, and phone — all in one native Mac window. No more context switching between 5+ apps.
HeyRobyn includes an AI phone agent that autonomously handles calls, screens spam, takes messages, and logs everything — all on-device. Postbox and eM Client have no phone automation.
Postbox was a simple email client. HeyRobyn integrates deeply with developer tools (GitHub PRs, Linear issues, Jira tickets) + Slack threads + email — perfect for product teams who need everything in one place.
All AI processing happens on your Mac (Apple Silicon optimized). No cloud uploads, no third-party AI APIs, no data sharing. Complete privacy for your communications.
HeyRobyn is built exclusively for macOS with Swift + native APIs. Postbox and eM Client are cross-platform apps (Windows-first design ported to Mac), which means slower performance and no deep macOS integrations.
Postbox is discontinued (last version 7.0.65). eM Client is Windows-centric. HeyRobyn is actively developed for macOS with a modern UI designed for 2026 workflows.
| Feature | Postbox | HeyRobyn |
|---|---|---|
| Email Client (IMAP/POP) | ✅ | ✅ |
| Lightning-Fast Search | ✅ | ✅ |
| Keyboard Shortcuts | ✅ | ✅ |
| Filters/Rules | ✅ | ✅ |
| Slack Integration | ❌ | ✅ |
| GitHub/Linear/Jira Integration | ❌ | ✅ |
| AI Phone Assistant | ❌ | ✅ |
| On-Device AI (100% Private) | ❌ | ✅ |
| Mac-Native (Built for macOS) | ❌ (cross-platform) | ✅ |
| Unified Inbox (Email + Slack + GitHub) | ❌ | ✅ |
| Active Development | ❌ (discontinued) | ✅ |
| Email Templates | ✅ (70 templates) | ✅ |
| Pricing Model | $60 one-time (discontinued) | $25/mo subscription |
✅ You're a developer or product team
You need GitHub PRs, Linear issues, Jira tickets, and Slack threads alongside email — not just a simple email client.
✅ You want a Mac-native experience
Postbox and eM Client are cross-platform (Windows-first). HeyRobyn is built exclusively for macOS with native performance and deep system integrations.
✅ You value privacy and on-device processing
All AI happens on your Mac. No cloud uploads, no third-party AI APIs, no data sharing with external servers.
✅ You're frustrated with app switching
Stop jumping between Gmail, Slack, GitHub, and Linear. HeyRobyn brings everything into one native Mac window.
✅ You want AI phone automation
HeyRobyn's AI phone assistant handles calls, screens spam, takes messages — all autonomously and on-device.
✅ You need active development + modern features
Postbox is discontinued. eM Client is Windows-centric. HeyRobyn is actively developed for 2026 macOS workflows.
📧 You need PGP encryption
If PGP email encryption is critical, eM Client (which acquired Postbox) offers this. HeyRobyn focuses on unified inbox and AI automation instead.
💻 You use Windows primarily
HeyRobyn is Mac-only. If you need Windows support, eM Client is cross-platform.
📅 You need advanced calendar management
eM Client has extensive calendar features. HeyRobyn focuses on unified communications (email, Slack, GitHub, phone) rather than deep calendar functionality.
Yes! HeyRobyn connects directly to your email accounts (IMAP/Gmail/Outlook) and pulls in your existing emails. No migration tool needed — just connect your accounts.
No. HeyRobyn is built exclusively for macOS (optimized for Apple Silicon). This gives us native performance that cross-platform apps like Postbox can't match.
$25/mo flat — no per-user fees, unlimited team members. Postbox was $60 one-time, but it's discontinued. eM Client is $50/license (one-time).
Yes! HeyRobyn has extensive keyboard shortcuts for all actions (navigate, archive, reply, search, etc.). Mac-native shortcuts work seamlessly.
Yes. All AI processing happens on your Mac. No cloud uploads, no third-party AI APIs, no data sharing. Complete privacy for your communications.
Any IMAP/POP email account: Gmail, Outlook, Yahoo, AOL, iCloud, Fastmail, ProtonMail, custom domains, etc. Same as Postbox.
Unified inbox + AI phone assistant + developer tools — $25/mo flat. Mac-native, 100% private.
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