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Arena raises $200M Series B at $3.1B valuation led by Lightspeed and Khosla. The AI leaderboard platform nearly doubles valuation in 10 months.

PRIVATEOct 08, 2026

Amount Raised

$200 Million

Round Type

Series B

BrazilSoftwareConsumer Goods

Investors

FelicisAndreessen HorowitzEndeavor CatalystDell Technologies Capital01 AdvisorsSalesforce VenturesKhosla VenturesLightspeed Venture Partners

Description

Arena, an AI model leaderboard platform originating from UC Berkeley, raised $200 million in Series B funding at a $3.1 billion valuation. The round was led by Lightspeed Venture Partners and Khosla Ventures, with participation from Salesforce Ventures, a16z, Felicis, and others. Arena achieved $100 million in annualized run-rate revenue by June 2026. The company's valuation has nearly doubled since its $150 million Series A in January at $1.7 billion post-money valuation.

Company Information

Company

Arena

Location

Brazil

About

The company is growing fast with 35 employees, a number he expects to triple by the end of this year. Today the company announced another big step in that process with a $13.6 million Series A. Arena provides the tools to embed online discussions into your website, where people can communicate with one another, help solve problems together and create a sense of camaraderie around the brand.

Fundz sees it the moment Arena raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.

Related People

2 contacts
Verified contactsLuis, Head of Product hidden hiddenSee plans and pricing
Predictive Intelligence
Strategic

ML-powered predictions for Arena's next move

See what Strategic adds

Funding Insights

What this usually means
Timeline to next round
Series B companies typically work for 15-20 months before raising new capital
Growth expectations
Series B companies are expected to scale rapidly and expand market reach

Arena 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.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include FundzWatch™ for automated website change detection, Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.