Tarsal alternatives
TL;DR: 12 companies doing similar work to Tarsal in B2B, ranked by how closely they match what Tarsal 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 Tarsal. They are scored on how closely their own description overlaps with Tarsal's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Tarsal?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Hiro | Agents that handle security work | Summer 2023 | 2 | Active |
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Unbound | Use AI tools without fear of data leakage | Summer 2024 | 7 | Active |
| Sherpa Labs | Frontier Data | Winter 2025 | 5 | Active |
| Dyneti Technologies | Reduce payment fraud | Winter 2019 | 3 | Active |
| PromptArmor | LLM Security and Compliance | Winter 2024 | — | Active |
| Cotool | Security operations optimized for agents. | Spring 2025 | 8 | Active |
| Matano | Cloud Native SIEM (alternative to Splunk/Elastic) | Winter 2023 | 2 | Active |
| Kestrel AI | AI Agents for Platform Engineering | Fall 2025 | 2 | Active |
| Hyperbrowser | Web infra for AI agents | Summer 2021 | 4 | Active |
| TRM Labs | TRM is building a safer world for billions of people. | Summer 2019 | 400 | Active |
Is Tarsal still active?
Tarsal has been acquired, which often means pricing, roadmap or support changes. That is the usual reason people start looking at this list.
How was this list put together?
Every company here is Y Combinator-backed and shares at least one category with Tarsal. They are then ranked on how closely their own description overlaps with Tarsal's, so the closest matches come first rather than whoever happens to share a tag.