Arena logo
#110 by ARRSan Francisco, USarena.ai ↗

Arena

Arena is an AI evaluation platform that benchmarks AI models and agents using real-world human feedback

ARR
$100M
as of Jun 2026
Employees
≈114
Valuation
$3.1B
31× ARR
ARR / employee
$877K
revenue efficiency
About Arena

Arena.ai is an AI evaluation platform that helps frontier AI labs and enterprises measure, benchmark, and improve AI models using real-world human feedback. The company operates one of the world's largest AI evaluation platforms, powering public leaderboards and enterprise products for evaluating language models, multimodal systems, and AI agents. Arena.ai enables organizations to make better AI decisions through large-scale human preference data and real-world performance measurement.

Arena is an AI evaluation platform that benchmarks AI models and agents using real-world human feedback

Investors · 15

LeadKhosla VenturesVenture capital47 partners on file
LeadLightspeed Venture PartnersVenture capital66 partners on file
BoardAndreessen HorowitzVenture capital· Anjney Midha (Venture Partner at Andreessen Horowitz)290 partners on file
BoardFelicisVenture capital· Peter Deng (Board Observer; Partner at Felicis (his Felicis affiliation is from prior knowledge, not confirmed in sources))17 partners on file
Investor01 AdvisorsVenture capital12 partners on file
InvestorAMP PBCVenture capital
InvestorDell Technologies CapitalCorporate10 partners on file
InvestorEndeavor CatalystVenture capital
InvestorFelicisVenture capital17 partners on file
InvestorKleiner PerkinsVenture capital20 partners on file
InvestorLaude VenturesVenture capital2 partners on file
InvestorLDVPVenture capital
InvestorQuantumLightVenture capital3 partners on file
InvestorSalesforce VenturesCorporate18 partners on file
InvestorThe House FundVenture capital2 partners on file
InvestorUC InvestmentsAsset manager / other14 partners on file
501 partner contacts across these firms, emails and LinkedIn are in Investor Contacts for paid members.

News, deals & research

Latest in AI
DealArena, the LMArena leaderboard company, raises $200M Series B at $3.1B valuationOct 8DealArena raises $150M Series A at $1.7B for crowd-sourced model evaluationJan 6
Members see the full Revenue Leaderboard · 2,100+ private AI companies ranked by revenue, filterable by category and country, free.
Create my free account →Log in