Arena, an AI evaluation platform, secured $200 million in Series B funding led by Lightspeed Venture Partners and Khosla Ventures, reaching a $3.1 billion valuation.
Amount Raised
$200 Million
Round Type
Series B
BerkeleySoftwareArtificial IntelligenceMachine LearningNatural Language ProcessingInvestors
Description
Arena, an AI evaluation platform founded by two UC Berkeley PhDs, completed a $200 million Series B round co-led by Lightspeed Venture Partners and Khosla Ventures. The funding pushes the company's valuation to $3.1 billion, up 80% from $1.7 billion in January 2026. Arena provides evaluation, exam administration, and scoring services for AI models including ChatGPT and Claude, with annualized revenue exceeding $100 million as of June 2026. The company has emerged as a key player in the rapidly growing AI evaluation market.
Quick answer
Arena raised $200 Million in a Series B round, dated October 15, 2026. Investors: Lightspeed Venture Partners and Khosla Ventures. Arena is based in Berkeley, California, United States.
- How much did Arena raise?
- Arena raised $200 Million in a Series B round on October 15, 2026.
- Who invested in Arena?
- Lightspeed Venture Partners and Khosla Ventures are named as investors in this round.
- What does Arena do?
- Arena Intelligence is an AI evaluation platform that administers exams and scores for AI models including ChatGPT, Claude, and others.
- Where is Arena based and how big is it?
- Arena is based in Berkeley, California, United States.
Source: Fundz verified event record.
Who else raised in Natural Language Processing and Software around the same time
Companies in the same sectors as Arena that raised within 45 days of this round, from Fundz verified event records.
- Coframe raised $25M (Series A) on November 9, 2026.
- Guava AI Systems raised $13M (Seed) on November 6, 2026.
- Jam & Raph raised $2K (Pre-Seed) on November 4, 2026.
- Tallia raised $4.5M (Seed) on November 3, 2026.
- Granter raised $1.8M (Seed) on November 3, 2026.
- Trajectory raised $45M (Series B) on November 2, 2026.
Who to call at Arena, and when
A new round usually means Arena is about to hire and buy. The teams that reach out first get the meeting.
- An alert the day Arena raises, hires an executive or expands, scored against what you sell
- The decision-makers there, with verified emails
- Who you already know at Arena, from your own LinkedIn network
Works inside ChatGPT and Claude. Ask who to call at Arena. With Fundz connected, it knows.
AI made execution free. Knowing first is the whole game now.
Fundz sees it the moment Arena raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.
Funding Insights
What this usually meansArena raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.
145 of these a day, filtered to the companies you pick, with the decision-maker attached.
5 screens from a live account. No signup.