Antigen alternatives
TL;DR: 12 companies doing similar work to Antigen in B2B, ranked by how closely they match what Antigen 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 Antigen. They are scored on how closely their own description overlaps with Antigen's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Antigen?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Eivod | — | Summer 2007 | 51 | Inactive |
| Fithub | — | Winter 2010 | — | Inactive |
| Stackq | — | Summer 2009 | — | Inactive |
| BitSample | — | Winter 2008 | — | Inactive |
| Brushes | iPad drawing software. | Summer 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Atrisa | AI Agents for Analog Circuit Design | Spring 2026 | 3 | Active |
| SolidStage | Sysadmin as a service. We make deploying, configuring, monitoring,… | Winter 2012 | — | Inactive |
| Audobox | Audobox is a developer and user friendly tool for in-app feedback. | Summer 2013 | — | Inactive |
| Hoplite | Effortlessly deploy cloud software factories. | Summer 2026 | 2 | Active |
| OpenRelay | Distributed, hardware-agnostic AI inference | Summer 2026 | 2 | Active |
| Credictive | Attribution metatags for online content. | Summer 2012 | — | Inactive |
Is Antigen still active?
Antigen 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 Antigen. They are then ranked on how closely their own description overlaps with Antigen's, so the closest matches come first rather than whoever happens to share a tag.