Heavybit · Dec 2025
Heavybit announces its investment in Vibrant Labs and describes the company as building production-grade, RL-ready simulation and verifier-driven evaluation for long-horizon AI agents.
RL environments for long horizon AI Agents
Company research
Public company, workplace, funding, and market signals
Updated Jul 29, 2026
Overview
Vibrant Labs is a San Francisco-based applied research and AI infrastructure company building RL-ready simulation environments, benchmarks, and verifier-driven tooling for long-horizon agents. It emerged from the Ragas open-source evaluation project and now focuses on autonomous environment generation for tool-use and computer-use agents.
Primary product
RL-ready simulation environments and self-evolving benchmarks for long-horizon AI agents
Founded
2023
Headquarters
San Francisco, California, United States
Team size
2-10 employees
Work style
Remote
Industry
Software Development
Sub-industry
AI infrastructure / developer tools / agent simulation
Offices
San Francisco, California, United States
Business model
B2B software
AI infrastructure
developer tools
open-source platform
Funding
Stage
Pre-seed
Total raised
$2.5M
Latest round
Pre-seed · Dec 2025
Latest amount
$2.5M
Dec 2025 · Y Combinator
People & investors
Work & culture
Research-driven, open-source-oriented, and builder-researcher culture focused on making AI systems work in the real world, with an emphasis on benchmarking, evaluation, and safe-to-fail simulation.
Work style
Remote
Product & market
Differentiators
- —Autonomous environment generation instead of hand-built benchmarks
- —Curriculum-learning / unsupervised environment design
- —Self-evolving benchmarks that grow with model capabilities
- —RL-ready worlds for training, testing, and validation
- —Focus on both tool-use and computer-use agent modalities
- —Built by the team behind Ragas
Technology
Ragas
Tau2-Infinity
Ecom Bench
Cloning Bench
verifier-driven evaluation
curriculum learning
unsupervised environment design
open-ended benchmarks
RL-ready simulation environments
browser agents
computer-use agents
GitHub open-source development
Customers
AI research organizations
teams building long-horizon AI agents
developers of browser and computer-use agents
teams building tool-use and agentic workflow products
Latest news
iSrch.com · Dec 2025
Third-party coverage of the company’s $2.5M pre-seed round and launch focus on benchmarking and improving long-term AI agent capabilities.
LinkedIn · Dec 2025
Investor/partner post announcing support for Jithin James and Shahul Elavakkattil Shereef as they build RL-ready worlds and developer workflows for long-horizon AI agents.
Signalbase · Dec 2025
Funding roundup coverage summarizing the company’s $2.5M pre-seed raise and its agent-testing / simulation-environment positioning.
Vibrant Labs · Nov 2025
Official launch post announcing Vibrant Labs’ emergence from stealth, its $2.5M pre-seed round, and its focus on RL-ready simulation environments for long-horizon agents.
Jobs and careers at Vibrant Labs
0 jobs at Vibrant Labs
No open positions
Check back later for new openings