Reality Defender alternatives
TL;DR: 12 companies doing similar work to Reality Defender in B2B, ranked by how closely they match what Reality Defender 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 Reality Defender. They are scored on how closely their own description overlaps with Reality Defender's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Reality Defender?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Dyneti Technologies | Reduce payment fraud | Winter 2019 | 3 | Active |
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Hiro | Agents that handle security work | Summer 2023 | 2 | Active |
| PromptArmor | LLM Security and Compliance | Winter 2024 | — | Active |
| Sphere Secure Workspace | — | Summer 2015 | 2 | Acquired |
| Sublime Black | Automating Cyber Security Incident Response Through Artificial… | Winter 2019 | — | Inactive |
| Aedilic | Open-Source AI-generated image/deepfake detection | Winter 2024 | 2 | Inactive |
| Templarbit | Protecting applications from malicious activity | Summer 2017 | 11 | Acquired |
| Variance | AI Agents for Fraud Review and Investigations | Winter 2023 | 12 | Active |
| Observa | Catch accidental database exposures before the bad guys | Winter 2021 | 1 | Inactive |
| Appcanary | Appcanary tracks the dependencies you use in your apps and servers… | Summer 2015 | 2 | Acquired |
Is Reality Defender still active?
Reality Defender 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 Reality Defender. They are then ranked on how closely their own description overlaps with Reality Defender's, so the closest matches come first rather than whoever happens to share a tag.