Arena
Agent49Agent Readiness: 49/100. Top 25%. Measured by StartupHub.ai. Median 41.Trust65Data Trust: 65/100. Above median. Measured by StartupHub.ai. Median 61.The de facto public leaderboard for frontier LLMs.
About
Arena is a startup that has emerged as the de facto public leaderboard for frontier Large Language Models (LLMs). It plays a significant role in influencing funding, launches, and PR cycles within the competitive AI model space. The company originated from UC Berkeley PhD research.
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Key facts
- Website
- lmsys.org
- Headquarters
- Berkeley, California, USA
- Founded
- 2023
- 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 |
| 21 May 2025 | Seed | $100M | $600M | UC Investments, Another VC |
Tech stack
Detected on lmsys.org, last scanned 20 Oct 2026. Run your own scan
- Frontend
- Next.js
- CMS / Builders
- Framer
- CDN
- Vercel
- Email provider
- Google Workspace
Arena scores 79. Does yours?
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Frequently asked
Is Arena trustworthy and reputable?
StartupHub's Data Trust & Reputation score for Arena is 65 out of 100, a generally safe rating, based on site security posture, privacy practices, malware and phishing checks, and public reputation signals.
How much funding has Arena raised?
Arena has raised a total of $250M in funding. The most recent round on record is Series A.
Public record
SEC filings, insider activity, nonprofit links and pay benchmarks for Arena
