Arena - About the company
Arena is a series A company based in San Francisco (United States), founded in 2025 by Ion Stoica, Anastasios Angelopoulos and Wei-Lin Chiang. It operates as a Provider of a platform for benchmarking and comparing AI models. Arena has raised $250M in funding from investors like University of California, Andreessen Horowitz and Felicis Ventures, with a current valuation of $1.7B. The company has 24 active competitors, including 1 that is funded. Its top competitors include companies like GPUVault, BiasAI and LayerLens.
Sectors and market segments that Arena operate in
Arena serves in the High Tech, Native AI market segments.The primary business model of Arena are:Company Details
Provider of a platform for benchmarking and comparing AI models. The platform allows users to evaluate and contrast different artificial intelligence models. It offers features such as a leaderboard, search functionality, and a battle mode for model comparisons.
- Website
- arena.ai
- Social
Key Metrics
Founded Year
2025
Location
San Francisco, United States
Stage
Series A
Total Funding
$250M in 2 rounds
Latest Funding Round
Post Money Valuation
$1.7B as on Jan 06, 2026
Investors
Ranked
1st among 24 active competitors
Employee Count
55 as on Feb 28, 2026
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Arena's funding and investors
Arena has raised a total funding of $250M over 2 rounds. Its first funding round was on May 21, 2025. Its latest funding round was a Series A round on Jan 06, 2026 for $150M. 8 investors participated in its latest round. Arena has 8 institutional investors.
Here is the list of recent funding rounds of Arena:
Date of Funding | Funding Amount | Round Name | Post-Money Valuation | Revenue Multiple | Lead Investors | Other Investors |
|---|---|---|---|---|---|---|
Jan 06, 2026 | $150M | Series A | - | - | ||
May 21, 2025 | $100M | Seed | $600M | - |
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Arena's founders and board of directors
Founder? Claim ProfileThe founders of Arena are Ion Stoica, Anastasios Angelopoulos and Wei-Lin Chiang. Anastasios Angelopoulos is the CEO of Arena.
Here are the details of Arena's key team members:
- Ion Stoica: Co-Founder of Arena. Contact Info: 1 email address
- Anastasios Angelopoulos: Co-Founder & CEO of Arena and founder of 1 other company. Contact Info: 2 email addresses
- Wei-Lin Chiang: Co-Founder & CTO of Arena and founder of 1 other company.
View details of Arena's Founder profiles and Board Members
Arena's employee count trend
Arena has 55 employees as of Feb 26. Here is Arena's employee count trend over the years:
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Arena's Competitors and alternates
Top competitors of Arena include GPUVault, BiasAI and LayerLens. Here is the list of Top 10 competitors of Arena, ranked by Tracxn score:
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Rank | Company Details | Short Description | Total Funding | Investors | Tracxn Score |
|---|---|---|---|---|---|
1st |  Arena 2025, San Francisco (United States), Series A | Provider of a platform for benchmarking and comparing AI models | $250M | 58/100 | |
2nd |  GPUVault 2023, Unfunded | Provider of fully managed CloudGPU hosting for AI model building and deployment | - | - | 24/100 |
3rd |  BiasAI 2021, New York City (United States), Unfunded | Provider of a cloud and AI-enabled image annotation platform | - | - | 24/100 |
4th |  LayerLens 2024, Miami (United States), Unfunded | Provider of a platform for evaluating generative AI application performance | - | - | 24/100 |
5th |  Countless 2022, New York (United States), Unfunded | - | - | - | 24/100 |
6th | nailedit.ai Seattle (United States), Unfunded | Platform offering side-by-side comparison of multiple large language models | - | - | 24/100 |
7th | Ppq Dover (United States), Unfunded | Provider of pay-per-prompt AI service offering access to various AI models | - | - | 24/100 |
8th | GiGOS 2024, San Diego (United States), Unfunded | Developer of a platform to test and compare AI models | - | - | 24/100 |
9th | Open Athena Unfunded | Provider of engineering and infrastructure to accelerate scientific foundation model development | - | - | 24/100 |
10th | Provider of AI model evaluation and certification platform for enterprises | - | - | 22/100 |
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Arena's Investments and acquisitions
Arena has made no investments or acquisitions yet.
Reports related to Arena
Here is the latest report on Arena's sector:
News related to Arena
Media has covered Arena for a total of 5 events in the last 1 year, 2 of them have been about company updates and 1 about partnerships.
•
Arena Launches Academic Partnerships Program to Advance AI Evaluation ResearchPR Newswire•Feb 10, 2026•Arena
•
AI Evaluation Startup LMArena Secures $150M at $1.7B ValuationSiliconAngle•Jan 07, 2026•University of California, Felicis Ventures, University of California, The House Fund and 6 others
•
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A16z Leads $100M Seed Funding for AI Startup LM ArenaTech in Asia•May 22, 2025•Andreessen Horowitz, Lightspeed Venture Partners, Felicis Ventures, Kleiner Perkins and 1 other
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