{"slug":"lmarena","name":"LMArena","website":"https://lmarena.ai","tagline":"Crowdsourced model leaderboards from the Chatbot Arena team","description":"LMArena, spun out of UC Berkeley's Chatbot Arena project, runs crowdsourced head-to-head AI model evaluations and leaderboards used across the industry. Evals-focused rather than RL environments, but a core evaluation vendor to labs.","domains":["multi-domain","machine-learning"],"locations":["San Francisco","Berkeley"],"founders":[{"name":"Anastasios Angelopoulos","xHandle":"ml_angelopoulos"},{"name":"Wei-Lin Chiang","xHandle":"infwinston"},{"name":"Ion Stoica","xHandle":null}],"teamSize":"26-50","funding":"$100M seed (a16z, UC Investments, 2025); $150M at $1.7B valuation (Jan 2026)","raising":null,"founded":2024,"notable":"Chatbot Arena leaderboard is a de facto industry standard","entityType":"Pure-play commercial","canonicalUrl":"https://envindex.com/startup/lmarena","research":null,"sources":[],"capabilityCatalog":{"startupSlug":"lmarena","reviewedAt":"2026-08-16","status":"cataloged","items":[{"name":"Arena Leaderboards","kind":"Benchmark","summary":"Crowdsourced head-to-head model evaluations and public leaderboards.","access":["Public / Open"],"sourceUrl":"https://arena.ai","sourceLabel":"Arena","verificationStatus":"company-reported","lastVerified":"2026-08-16"}]},"artifacts":[],"caveat":"Legacy profile awaiting claim-level source migration"}