Startups Directory

LMArena is a crowdsourced AI evaluation platform where users compare anonymous model responses through blind pairwise voting, generating a public leaderboard ranked by human preference rather than static benchmarks. The platform serves AI labs, enterprises, and developers seeking production-ready model evaluations across domains including law and medicine. Its commercial AI Evaluations service generates $30M+ annualized run rate by providing enterprises access to community feedback data for model improvement. The platform has become the most-cited 'real user preference' leaderboard in AI, with 5M+ monthly users generating 60M+ conversations monthly.