Mantis alternatives
TL;DR: 12 companies doing similar work to Mantis in B2B, ranked by how closely they match what Mantis 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 Mantis. They are scored on how closely their own description overlaps with Mantis's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Mantis?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Bryel | Devin for AI Research Engineering | Fall 2026 | 2 | Active |
| Magma | Monetize your agent's traces. | Summer 2026 | 1 | Active |
| primitive | communication for agents | Spring 2026 | 4 | Active |
| PhoneSys | The Phone System for Sales Teams. | Summer 2011 | 4 | Inactive |
| Miso Labs | Emotive foundation voice models | Spring 2026 | 3 | Active |
| Parasma | Replacing GPUs with human brain cells | Summer 2026 | 2 | Active |
| Cascade | Distilling Proprietary Intelligence | Winter 2026 | 2 | Active |
| Rescale | High Performance Computing Built for the Cloud | Winter 2012 | 250 | Active |
| Memorable | reducing agent reasoning into a graph search problem | Summer 2027 | 2 | Active |
| GoScale | Dynamical Scaling Virtual Machines as a Service | Summer 2012 | 2 | Inactive |
Is Mantis still active?
Mantis 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 Mantis. They are then ranked on how closely their own description overlaps with Mantis's, so the closest matches come first rather than whoever happens to share a tag.