Parameter (fka Hex Security) alternatives

TL;DR: The closest YC-backed alternatives to <strong>Parameter (fka Hex Security)</strong> are other Y Combinator B2B companies, especially from the Winter 2026 batch. Below are 20 ranked competitors with batch, status, and team size.

Y Combinator-backed B2B companies similar to Parameter (fka Hex Security) (YC Winter 2026).

Last verified:

  • General Legal YC Winter 2026 · Active · 25 people — Elite AI law firm for high growth companies
  • Didit YC Winter 2026 · Active · 16 people — Infrastructure for identity and fraud.
  • Luel YC Winter 2026 · Active · 12 people — Turning everyday words and actions into usable training data.
  • Revion YC Winter 2026 · Active · 10 people — Intelligence for Automotive Operations
  • Moritz YC Winter 2026 · Active · 10 people — Global AI-native law firm handling legal work with same-day turnaround
  • Lance YC Winter 2026 · Active · 10 people — AI Agents That Run Hotel Operations.
  • Piris Labs YC Winter 2026 · Active · 8 people — The Networking Layer of AI
  • Samora AI YC Winter 2026 · Active · 8 people — Multilingual voice agents that outperform humans
  • Oximy YC Winter 2026 · Active · 8 people — Take command of the AI your company already runs on.
  • Polymath YC Winter 2026 · Active · 6 people — Simulation environments to train & evaluate long-horizon AI agents
  • Moda YC Winter 2026 · Active · 6 people — Continual learning for AI agents
  • Overshoot YC Winter 2026 · Active · 5 people — AI Infra for real-time vision applications
  • Fixture YC Winter 2026 · Active · 5 people — An AI-first CRM built for Startups
  • Wayco YC Winter 2026 · Active · 5 people — AI operator for medlegal cases
  • Vector Legal YC Winter 2026 · Active · 5 people — A premier AI-native law firm & legal operating system for Startups.
  • RunAnywhere YC Winter 2026 · Active · 5 people — The default way of running on-device AI at Scale
  • /dev/fast YC Winter 2026 · Active · 4 people — /dev/fast is the AI-native code forge
  • Polymorph YC Winter 2026 · Active · 4 people — Building the future of the consumer internet
  • Avoice YC Winter 2026 · Active · 4 people — Harvey for Architecture
  • Perfectly YC Winter 2026 · Active · 4 people — The AI-native Recruiting OS

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