LMArena
A platform for evaluating AI models through anonymous, crowd-sourced pairwise human comparisons and leaderboards.
About
LMArena provides a transparent, community-driven evaluation platform where users compare anonymous AI model responses to determine performance. It serves as a critical benchmark for AI developers and enterprises to assess real-world model utility and reliability.
Technology stack
detected 2026-06-11Est. monthly stack spend~$580/mo
CDN
Cloudflare
Email
Google Workspace
Hosting
Vercel
Stack
Next.js
Tailwind CSS
Analytics
Google Analytics 4
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Frequently asked
What does LMArena do?
LMArena provides a transparent, community-driven evaluation platform where users compare anonymous AI model responses to determine performance. It serves as a critical benchmark for AI developers and enterprises to assess real-world model utility and reliability.
How much funding has LMArena raised?
LMArena has raised a total of $250M in funding. The most recent round on record is Series A.
Where is LMArena headquartered?
LMArena is headquartered in San Francisco, United States.
When was LMArena founded?
LMArena was founded in 2025.
What industry does LMArena operate in?
LMArena operates in AI, SaaS, Data.
How many employees does LMArena have?
LMArena has approximately 55 people on record.