Mirrors alternatives
TL;DR: 12 companies doing similar work to Mirrors in B2B, ranked by how closely they match what Mirrors actually does — not just by category.
How this list was built: every company here is Y Combinator-backed and shares at least one category with Mirrors. They are scored on how closely their own description overlaps with Mirrors's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Mirrors?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Magma | Monetize your agent's traces. | Summer 2026 | 1 | Active |
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| primitive | communication for agents | Spring 2026 | 4 | Active |
| Bryel | Devin for AI Research Engineering | Fall 2026 | 2 | Active |
| Memorable | reducing agent reasoning into a graph search problem | Summer 2027 | 2 | Active |
| Terse | Durable state for AI agents | Fall 2026 | 2 | Active |
| Memory Store | Company Brain. | Spring 2026 | 4 | Active |
| Ardent | Database sandboxes for Agents | Spring 2026 | 3 | Active |
| IncidentFox | AI SRE agent that triages, coordinates, and fixes production incidents | Winter 2026 | 2 | Active |
| AgentPhone | Phone Numbers for AI Agents | Spring 2026 | — | Active |
| PhoneSys | The Phone System for Sales Teams. | Summer 2011 | 4 | Inactive |
Is Mirrors still active?
Mirrors is still operating, so switching is a choice rather than a forced migration. Compare on fit and price rather than urgency.
How was this list put together?
Every company here is Y Combinator-backed and shares at least one category with Mirrors. They are then ranked on how closely their own description overlaps with Mirrors's, so the closest matches come first rather than whoever happens to share a tag.