Refresh | Y Combinator
Spring 2025 batch; RL training gyms for computer use and software engineering.
Weak funding evidence: mention does not include a parsed raise amount/round and may refer to non-funding context.
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Evidence-bound summary — expand sections for movement, risks, and signals.
Memo snapshot · May 20, 2026, 6:19 PM
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TL;DR
Seed (YC)Refresh RL environments for coding and computer-use training.
Raised $500K across 1 funding round. Latest: $500K Pre-seed (Apr 2025). Investors: Y Combinator. (High).
Funding
Raised $500K across 1 funding round. Latest: $500K Pre-seed (Apr 2025). Investors: Y Combinator. (High).
Hiring
4 hiring‑related row(s); role‑spam risk if mostly generic boards (High).
Product / news
1 product/news‑styled row(s); headline risk without filings (High).
Verified facts
+2 more in Recent movement below
Spring 2025 batch; RL training gyms for computer use and software engineering.
Weak funding evidence: mention does not include a parsed raise amount/round and may refer to non-funding context.
No open roles indexed yet.
The index price and activity score are algorithmic estimates based on observed public company-level signals. They may be incomplete, stale, or inaccurate and are not investment, legal, tax, or business advice.
Refresh:reddit_credentials_not_configured
discovery:google:google_cse_quota_exhausted
Source types found
Strongest / recent news-style rows
About page · Thu, Jul 2, 03:30 PM · confidence 90%high quality
Wed, May 20, 06:19 PM · confidence 88%high quality
Wed, May 20, 06:19 PM · confidence 85%high quality
Newest first · 28 event(s)
Source: Blog
Benchmarks, evaluations, and datasets for training frontier AI models. Original research on simulation engines for coding, healthcare, and document automation.
Source: Careers page
Refresh is hiring ex-founders, GTM engineers, and research engineers building the simulation engines frontier labs train on.
Source: About page
Refresh builds realistic simulation environments and evals to measure and push the frontier of model capabilities. We are a team of five former founders and CTOs working with the leading frontier labs.
Source: jobs_board
Source: jobs_board
Source: jobs_board
Source: jobs_board
Source: official_site
Open Roles | Refresh Refresh Blog Careers Get in Touch Blog Careers Get in Touch Open Roles Building the environments to enable the next generation of capabilities in LLMs. Building the environments to enable the next generation of capabilities in LLMs. Engin…
Source: official_site
Refresh Refresh Blog Careers Get in Touch Blog Careers Get in Touch Environments for Environments for the next capabilities the next capabilities Refresh builds simulated worlds for coding and computer use, with verifiable rewards that move models forward. Re…
Source: official_site
About | Refresh Refresh Blog Careers Get in Touch Blog Careers Get in Touch About We are a team of 5 former founders and CTOs pushing the state of model capabilities for the leading frontier labs. We have built and shipped real products to real customers, and…
Source: official_site
Blog | Refresh Refresh Blog Careers Get in Touch Blog Careers Get in Touch Blog Benchmarks, Evals, Benchmarks, Evals, and and Datasets Datasets Research on AI capabilities in real-world workflows. We build rigorous evaluations and training environments for fr…
Hiring research engineers and GTM.
Spring 2025 batch; RL training gyms for computer use and software engineering.
Source: Careers
Build the benchmarks frontier labs use to measure real-world coding and computer-use capability. Translate expert workflows into rigorous, verifiable evaluations, run them against frontier models, and publish numbers that hold up under a…
Source: Careers
Own the technical surface between Refresh and the frontier labs we sell to. Run evals on prospect models, stand up environments during pilots, write the demos that close deals, and feed what you learn back into product. For people who li…
Source: Careers
Own end-to-end delivery of the strategic projects behind our computer-use and coding data builds. You scope the work with frontier-lab customers, keep it shipping on timelines that matter, and stay hands-on across both the customer conve…
Source: npm_registry
React refresh plugin for Rspack
Source: npm_registry
TypeScript definitions for react-refresh
Source: npm_registry
Efficiently refresh a timer
Source: npm_registry
React Refresh transformer for TypeScript
Source: npm_registry
Validate that your components can safely be updated with Fast Refresh
Source: gdelt_doc_api
wgal.com
Source: hackernews
Open-source org for RL environment work.
6 row(s)
The company's own site — the authoritative description of what they sell and to whom. Marketing-controlled, so treat claims as positioning rather than verified traction.
Refresh builds simulation engines for coding and computer use, for frontier labs to train the next generation of virtual software engineering collaborators.
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗Open Roles | Refresh Refresh Blog Careers Get in Touch Blog Careers Get in Touch Open Roles Building the environments to enable the next generation of capabilities in LLMs. Building the environments to enable the next generation of capabilities in LLMs. Engin…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗Refresh Refresh Blog Careers Get in Touch Blog Careers Get in Touch Environments for Environments for the next capabilities the next capabilities Refresh builds simulated worlds for coding and computer use, with verifiable rewards that move models forward. Re…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗About | Refresh Refresh Blog Careers Get in Touch Blog Careers Get in Touch About We are a team of 5 former founders and CTOs pushing the state of model capabilities for the leading frontier labs. We have built and shipped real products to real customers, and…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗Blog | Refresh Refresh Blog Careers Get in Touch Blog Careers Get in Touch Blog Benchmarks, Evals, Benchmarks, Evals, and and Datasets Datasets Research on AI capabilities in real-world workflows. We build rigorous evaluations and training environments for fr…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗RL environments for coding and computer-use training.
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗5 row(s)
Third-party press coverage. Independent reporting corroborates company claims; repeated coverage across outlets is a momentum signal.
Refresh builds realistic simulation environments and evals to measure and push the frontier of model capabilities. We are a team of five former founders and CTOs working with the leading frontier labs.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗Hiring research engineers and GTM.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗wgal.com
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗1 row(s)
Funding announcements and investor-database records. The strongest public signal of capitalization: round, amount, and syndicate quality when disclosed.
Spring 2025 batch; RL training gyms for computer use and software engineering.
Why it matters: Funding signal — Pre-Seed per this source; verify against the linked original before relying on it.
Open source ↗8 row(s)
Open roles and careers pages. Active hiring implies runway to spend and shows where the company is investing (engineering vs GTM vs ops).
Refresh is hiring ex-founders, GTM engineers, and research engineers building the simulation engines frontier labs train on.
Why it matters: Hiring signal — open roles imply runway to spend and show where the company is investing.
Open source ↗Why it matters: Hiring signal — 4 open role(s) indexed; hiring implies runway and shows growth priorities.
Open source ↗Why it matters: Hiring signal — 4 open role(s) indexed; hiring implies runway and shows growth priorities.
Open source ↗Why it matters: Hiring signal — 4 open role(s) indexed; hiring implies runway and shows growth priorities.
Open source ↗Why it matters: Hiring signal — 4 open role(s) indexed; hiring implies runway and shows growth priorities.
Open source ↗Build the benchmarks frontier labs use to measure real-world coding and computer-use capability. Translate expert workflows into rigorous, verifiable evaluations, run them against frontier models, and publish numbers that hold up under a…
Why it matters: Hiring signal — open roles imply runway to spend and show where the company is investing.
Open source ↗Own the technical surface between Refresh and the frontier labs we sell to. Run evals on prospect models, stand up environments during pilots, write the demos that close deals, and feed what you learn back into product. For people who li…
Why it matters: Hiring signal — open roles imply runway to spend and show where the company is investing.
Open source ↗Own end-to-end delivery of the strategic projects behind our computer-use and coding data builds. You scope the work with frontier-lab customers, keep it shipping on timelines that matter, and stay hands-on across both the customer conve…
Why it matters: Hiring signal — open roles imply runway to spend and show where the company is investing.
Open source ↗6 row(s)
Public engineering activity. Sustained commits, releases, and stars indicate real product development and, for dev tools, developer adoption.
React refresh plugin for Rspack
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗TypeScript definitions for react-refresh
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗Efficiently refresh a timer
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗React Refresh transformer for TypeScript
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗Validate that your components can safely be updated with Fast Refresh
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗Open-source org for RL environment work.
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗1 row(s)
Social presence and mentions. A soft signal — useful for gauging attention and launch reception, not a substitute for verified traction.
Why it matters: Attention signal — social mention or presence; soft signal of market interest.
Open source ↗1 row(s)
Company blog and newsletters. Shipping cadence and technical depth of posts hint at product velocity and team quality.
Benchmarks, evaluations, and datasets for training frontier AI models. Original research on simulation engines for coding, healthcare, and document automation.
Why it matters: Company publishing — post cadence and depth hint at product velocity.
Open source ↗Sign in as an active team member to view private notes, watchlist controls, transcript evidence, and interaction history.