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Idler
AddedJun 25, 2026
UpdatedJul 6, 2026
Idler

Idler

Seed

Idler is a reinforcement-learning training environment vendor for code-generation models.

HQ
San Francisco, CA, US
Accelerator
Y Combinator logoY CombinatorS25
Overview
Compare
Fundraising
Employees

Idler builds reinforcement-learning training environments from real-world coding problems, giving model labs scenario-based settings in which to teach and evaluate code-generation models on realistic engineering tasks.

Its primary customers are foundation labs, AI research and evaluation teams, and organizations building coding-assistant products. Idler operates as a vendor of bespoke environment and data work to model-training labs, competing in the market for RL training infrastructure, code-benchmark tooling, and developer-facing AI evaluation.

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Idler - Quick Facts

Who are Idler's competitors?

Companies similar to Idler include Refresh, RunRL, Cartpole and Random Labs.

Where is Idler's headquarters located?

Idler's headquarters is located in San Francisco, CA, US.

When was Idler's last funding round?

Idler's most recent funding round was for $500k (USD) in June 2025.

How much has Idler raised to-date?

As of Jun 1, 2025, Idler has raised a total of $500k (USD).