Sift alternatives
TL;DR: 12 companies doing similar work to Sift in B2B, ranked by how closely they match what Sift 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 Sift. They are scored on how closely their own description overlaps with Sift's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Sift?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Dyneti Technologies | Reduce payment fraud | Winter 2019 | 3 | 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 |
| 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 |
| Variance | AI Agents for Fraud Review and Investigations | Winter 2023 | 12 | Active |
| Pagelever | Facebook analytics. Acquired by Unified in January 2013. | Summer 2011 | 11 | Acquired |
| Observa | Catch accidental database exposures before the bad guys | Winter 2021 | 1 | Inactive |
| Quantstamp | Security auditing for Web3 | Winter 2018 | 80 | Active |
Is Sift still active?
Sift 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 Sift. They are then ranked on how closely their own description overlaps with Sift's, so the closest matches come first rather than whoever happens to share a tag.