| Feature | MailShelf Pro | Microsoft Outlook | Gmail (Web) | Spark / Superhuman | | :--- | :--- | :--- | :--- | :--- | | | ✅ Unlimited | ❌ (Slow w/ many PSTs) | ❌ (Needs separate tab) | ✅ | | Offline Search over 1M emails | ✅ Instant | ❌ (Index corruption risk) | ❌ (Requires internet) | ❌ (Limited cache) | | Attachment OCR Search | ✅ Built-in | ❌ (Third-party only) | ❌ | ❌ | | One-Time Purchase Option | ✅ Yes | ❌ (Subscription/Perpetual license) | ❌ (Free/Workspace only) | ❌ (Subscription only) | | Local Data Control | ✅ Full | ✅ Partial | ❌ (Google servers) | ❌ (Cloud relay) |
Flight mode is no longer an excuse. The Pro Shelf caches your 500 most recent attachments locally. You can review contracts, watch video briefs, or read PDFs at 30,000 feet with zero Wi-Fi. MailShelf Pro
It automatically scans your inbox (using secure, local processing) and extracts every image, PDF, spreadsheet, and presentation. It then displays them in a stunning, visual grid. | Feature | MailShelf Pro | Microsoft Outlook