Compare
Ujex Postbox vs Nylas
Quick verdict
Nylas: agent uses an existing human's inbox via OAuth. Ujex Postbox: agent has its own programmatic inbox.
| Nylas | Ujex Postbox | |
|---|---|---|
| Per-agent inbox creation | ✗ | ✓ |
| Connect to existing Gmail/Outlook | ✓ (six providers) | ✗ |
| OAuth required | ✓ | ✗ |
| Self-hostable | ✗ | ✓ Apache-2.0 |
| Prompt-injection scoring | ✗ | ✓ |
| Mobile approve-before-send | ✗ | ✓ |
| MCP server | ✓ | ✓ |
Pick Nylas if
- Agent should act inside a human's existing inbox
- OAuth flow is acceptable
- You need cross-provider unified API
Pick Ujex Postbox if
- Agent should have its own dedicated inbox
- You want self-hostable, Apache-2.0
- You want prompt-injection scoring + mobile approval
Detailed: AgentMail vs Nylas vs Ujex Postbox.
FAQ
Can I use both?
Yes — Nylas for the user-inbox case, Ujex for agent-owned inboxes. Same agent.