Spacemail for Claude vs Agent Caffeine
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Spacemail for Claude compared with Agent Caffeine
| Detail | 
Spacemail for Claude | 
Agent Caffeine |
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| What it does | Free MCP connector for Claude to access Spacemail email
| Keep your Mac awake while AI agents work, also with the lid closed
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| Stage | Not given
| Not given
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| Founded | Not given
| Not given
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| Based in | GB
| TR
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| Pricing model | Open source
| Free trial
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| Pricing | Free
| Free for 7 days. After trial: $9 once (launch price), full price $14. One payment covers up to 3 Macs. Includes 1 year of updates.
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| Key features | - Check new mail across all mailboxes with message previews
- Search emails by sender, subject, words or date
- Read full email messages with attachment names
- Draft threaded replies and new emails saved to Drafts
- Mark messages as read or unread and flag important ones
- Archive, move or delete messages to Trash
- Works with Claude Desktop, Claude Code, Cursor and Windsurf
- Support for up to three mailboxes
- Drafts saved for manual review before sending
- Data stays on your computer, not collected by Norwich Website Design
| - Detects 40+ AI coding agents automatically
- Keeps Mac awake with lid closed
- Pause for 30 minutes, 1 hour, or until tomorrow
- Stay reachable for 1, 2, or 4 hours
- Display dims as lid closes
- Sound notification when lid closes
- iPhone hotspot fallback when Wi-Fi drops
- Battery level indicator in menu bar
- Command-line integration and MCP server support
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| What makes it different | - Free and open-source under MIT licence
- Email content marked as untrusted to prevent phishing attacks
- Deleted messages go to Trash, not permanently deleted
- Independent project not affiliated with Spaceship or Spacemail
| - Agent-aware sleep prevention knows when your agents work and only keeps Mac awake during actual work
- Closes lid without waking Mac or draining battery
- Automatic iPhone hotspot switching when Wi-Fi drops
- Works on up to 3 Macs with one lifetime purchase
- No subscription required after one-time purchase
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| Free plan | Not given
| Not given
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| Open source | Not given
| Not given
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| Platforms | Not given
| Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 44 ▼ −1 (down) since last check | 11 ▲ +2 (up) since last check |
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| Trust Flow (Majestic) | 0 | 6 |
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| Citation Flow (Majestic) | 4 | 33 |
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| Referring domains (Majestic) | 3 | 8 |
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6 details filled in for both companies.
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