ProjectX alternatives
TL;DR: 12 companies doing similar work to ProjectX in B2B, ranked by how closely they match what ProjectX 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 ProjectX. They are scored on how closely their own description overlaps with ProjectX's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to ProjectX?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| 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 |
| Magma | Monetize your agent's traces. | Summer 2026 | 1 | Active |
| Proxino | Javascript proxy. | Summer 2011 | — | Inactive |
| 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 |
| Memory Store | Company Brain. | Spring 2026 | 4 | Active |
| Ardent | Database sandboxes for Agents | Spring 2026 | 3 | Active |
| Indexable | sandbox infrastructure for AI agents | Spring 2026 | 3 | Active |
| AgentPhone | Phone Numbers for AI Agents | Spring 2026 | — | Active |
Is ProjectX still active?
ProjectX 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 ProjectX. They are then ranked on how closely their own description overlaps with ProjectX's, so the closest matches come first rather than whoever happens to share a tag.