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Arena Hits $100M Revenue Run Rate Eight Months After Evaluation Launch

June 29, 2026 at 12:23 EDT

Foundation Models
AI Agents
Funding & M&A

AI evaluation platform Arena (formerly LMArena) said on June 29, 2026 that it reached a $100M annualized revenue run rate (ARR) just eight months after launching its enterprise evaluation product, AI Evaluations. The startup grew out of a UC Berkeley research project, Chatbot Arena, with a founding mission to measure AI progress through real-world use.

January 2026 · Arena (formerly LMArena)

$100M revenue run rate — 8 months after its first paid product

The AI model-evaluation platform born from UC Berkeley's "Chatbot Arena" says demand for trusted, human-grounded evaluation is surging — closing a $150M Series A at a $1.7B post-money valuation.

$1.7B

post-money valuation (Series A)

$150M

Series A raised (~$250M total)

8 mo

from first paid product to $100M run rate

Revenue run rate after launch

Roughly 3× in four months

$30M+

Dec 2025
~4 months

$100M

claimed at
~8 months

Each block ≈ $10M annualized · $30M figure is official; $100M is a company claim.

3M+

monthly users

50M+

cumulative votes

400+

models evaluated

How the evaluation works

Two anonymous models answer the same prompt

→

Users vote for the better response

→

Crowdsourced leaderboard ranks real-world performance

Why it's a de facto standard

Grounded in millions of real human preferences
Spans text, vision, video, code, and agent tasks
Used by labs to improve and select models

Open questions

Bias toward popular prompts
Thin voting in specialized domains
Limited disclosure of paid pricing & outcomes

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