Compare vendors / Proximal
Proximal
Builds long-horizon coding environments and post-training data
Coding and SWE
Proximal calls itself a research lab focused on data and builds custom post-training data and long-horizon coding environments. Its FrontierSWE benchmark (v2) has 34 tasks with 20-hour budgets. Its template MSA is public: Proximal owns deliverables, the customer gets a non-exclusive internal-use licence, and Proximal may reuse materials for other customers.
Best for: Very long-horizon coding tasks, if non-exclusive terms work for you
$15M seed at $300M (Sep 2026)
- ✓ Bespoke builds
- – Platform or hub
- – Open source
- – Publishes prices
1 Legal nameProximal AI, Inc.
2 HeadquartersSan Francisco, CA
3 Founded2026
4 Team11–50 (LinkedIn band)
5 DeliveryBespoke builds
6 ExclusivityNon-exclusive by default
7 Customers and partnersNot disclosed
8 Published pricesNot disclosed
Where we recommend them
- Best for coding and SWE environments, an alternative.
Worth knowing before you sign
- Default contract terms are non-exclusive, with vendor IP ownership and reuse rights
- $200M annualized revenue claim is self-reported and unverified
- No named customers; no contact or demo link on its website
- No SOC 2; benchmark repos are unlicensed
Sources
- Proximal homepage
- Seed announcement
- Proximal template MSA
- The SaaS News: $15M seed
- FrontierSWE
- rl-list profile
- pavlovslist directory
Work at Proximal? Send corrections with a source to editors@toprlenvironments.com. We fix verified errors within five business days.
Compare with
- Prime Intellect Runs the Environments Hub, open-source RL tooling and hosted RL training
- HUD Platform and marketplace for building, buying and running RL environments
- General Reasoning Hosts RL environments as API endpoints through OpenReward
- Veris AI Simulated copies of a company’s systems for testing and training enterprise agents
- Vmax Generates new environments automatically from your data and evals