LMArena
Agent67Agent Readiness: 67/100. Top 25%. Measured by StartupHub.ai. Median 41.Trust81Data Trust: 81/100. Top 25%. Measured by StartupHub.ai. Median 61.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.
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Key facts
- Website
- arena.ai
- Headquarters
- San Francisco, United States
- Founded
- 2025
- Employees
- 71
- Total funding
- $250M (Series A)
- Business model
- B2B
Funding rounds
| Date | Round | Amount | Post-money | Lead investors |
|---|---|---|---|---|
| 6 Jan 2026 | Series A | $150M | $1.7B | Felicis, UC Investments |
| 1 May 2025 | Seed | $100M | $600M | UC Investments, Another VC |
Tech stack
Detected on arena.ai, last scanned 31 Oct 2026. Run your own scan
- Observability
- incident.io
- CDN
- Cloudflare
- Email provider
- Google Workspace
- Email marketing
- Customer.io
LMArena scores 82. Does yours?
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Frequently asked
Is LMArena trustworthy and reputable?
StartupHub's Data Trust & Reputation score for LMArena is 81 out of 100, a trusted rating, based on site security posture, privacy practices, malware and phishing checks, and public reputation signals.
How much funding has LMArena raised?
LMArena has raised a total of $250M in funding. The most recent round on record is Series A.
How many employees does LMArena have?
LMArena has approximately 71 people on record.
Public record
SEC filings, insider activity, nonprofit links and pay benchmarks for LMArena
