Stacksi alternatives
TL;DR: 12 companies doing similar work to Stacksi in B2B, ranked by how closely they match what Stacksi 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 Stacksi. They are scored on how closely their own description overlaps with Stacksi's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Stacksi?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Riot | Cybersecurity awareness for fast growing companies | Winter 2020 | 160 | Active |
| Dyneti Technologies | Reduce payment fraud | Winter 2019 | 3 | Active |
| Hiro | Agents that handle security work | Summer 2023 | 2 | Active |
| PromptArmor | LLM Security and Compliance | Winter 2024 | — | Active |
| Sublime Black | Automating Cyber Security Incident Response Through Artificial… | Winter 2019 | — | Inactive |
| Patchwork Security | Security patch notifications for servers. Build it, deploy it, and… | Winter 2016 | 2 | Inactive |
| Observa | Catch accidental database exposures before the bad guys | Winter 2021 | 1 | Inactive |
| Delve | AI that makes compliance effortless | Winter 2024 | 33 | Active |
| Unbound | Use AI tools without fear of data leakage | Summer 2024 | 7 | Active |
| SafeBase | Trust Center platform that scales customer security reviews | Summer 2020 | 60 | Acquired |
Is Stacksi still active?
Stacksi 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 Stacksi. They are then ranked on how closely their own description overlaps with Stacksi's, so the closest matches come first rather than whoever happens to share a tag.