Arena — Crowdsourced AI model evaluation (formerly LMArena/Chatbot Arena): free public leaderboard plus paid AI Evaluations for model labs and enterprises.. Pricing model: Free public product + consumption-based paid evaluations sold to labs/enterprises. Value metric: Evaluations consumed (consumption-based).
At a glance
| Company | Arena |
|---|---|
| What it does | Crowdsourced AI model evaluation (formerly LMArena/Chatbot Arena): free public leaderboard plus paid AI Evaluations for model labs and enterprises. |
| Headquarters | San Francisco Bay Area, USA (UC Berkeley spin-out) |
| Pricing model | Free public product + consumption-based paid evaluations sold to labs/enterprises |
| Value metric | Evaluations consumed (consumption-based) |
| Pricing page | unknown (no public price list) |
Plans and prices
Public leaderboard free; AI Evaluations priced by consumption, not public.
Growth milestones
Arena appears in our analysis of 2026's $100M ARR class. Figures are company-reported unless stated.
- 2026-01: $150M Series A at $1.7B post-money (total raised $250M); ARR ~$30M at announcement. (source)
- 2026-06-29: $100M annualised run-rate eight months after launching its commercial AI Evaluations service (Sept 2025); company notes revenue is consumption-based, not strictly recurring. (source)
How it grows
Community-driven: a free leaderboard used by millions (10M+ user votes) becomes the industry reference; voters attracted by early access to unreleased models; monetise the labs that need the data.
What you can steal
network effects
A free public product that improves with every user (votes) builds both the audience and the dataset you later sell.
moats
Audience: becoming the trusted public benchmark in a niche is a moat money alone can't buy.
usage-based pricing
Be honest that consumption revenue isn't 'recurring'; plan for volatility and convert big users to committed contracts.
Sources
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Robert Coorey, MBA
Robert is the author of The Subscription Playbook and Feed a Starving Crowd and a Director at BPAG Accountants in Sydney. More about Robert.