About LMArena
LMArena is a company based in San Francisco (United States) founded in 2025 by Ion Stoica, Anastasios Angelopoulos, and Wei Lin Chiang. LMArena has raised $250 million across 2 funding rounds from investors including Kleiner Perkins, Lightspeed Venture Partners and University of California.
- Headquarter San Francisco, United States
- Founders Ion Stoica, Anastasios Angelopoulos, Wei Lin Chiang
- SectorsTechnology
- Website category Computers Electronics and Technology · Programming and Developer Software
- Email••••••••
- Website lmarena.ai
- Social LinkedIn X
- Total Equity Funding$250M (USD)
in 2 rounds
- Latest Funding Round$150M (USD), Series A
Jan 2026
- InvestorsKleiner Perkins
& 8 more
Funding Insights of LMArena
LMArena has successfully raised a total of $250M across 2 strategic funding rounds. The most recent funding activity was a Series A round of $150 million completed in January 2026. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $250M
- Total Rounds 2
- Last Round Series A — $150M
- First Round $100M
(May 2025)
- Investors Count 9
All 2 funding rounds of LMArena with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Jan 2026 | $150M | Series A | – | Felicis Ventures, University of California | |
| May 2025 | $100M | Seed | – | a16z, University of California |
9 investors in total: 9 institutional.
Investors in LMArena
LMArena has secured backing from 9 investors, including venture fund and institutional investors. Prominent investors backing the company include Kleiner Perkins, Lightspeed Venture Partners and University of California.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Venture capital investments in technology sectors are handled by Andreessen Horowitz. | – | a16z.com | - | |
Venture capital investing in innovative companies across global sectors is undertaken by Lightspeed Venture Partners. | 1997 | lsvp.com | Menlo Park, United States | |
Investments in technology startups are made by Felicis Ventures. | – | felicis.com | Menlo Park, United States | |
Venture capital firm investing in early-stage tech startups | 1972 | kleinerperkins.com | Menlo Park, United States | |
Seed-stage investments in US tech companies are targeted. | – | thehouse.fund | Berkeley, United States | |
- | – | ldvp.com | - | |
Multiple courses and degrees are offered across diversified academic streams. | 1869 | universityofcalifornia.edu | United States | |
- | – | ucop.edu | - | |
- | – | laude.vc | - |
Investor details for LMArena
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
- Complete investor list
- Round participation
- Investor portfolios
- Co-investor network
Verified entity values are shown only after access is granted.
People of LMArena
3 people are tracked at LMArena (3 in leadership).
| Name | Role | Group |
|---|---|---|
Ion Stoica | Co-Founder | Leadership |
Anastasios Angelopoulos | Co-Founder & CEO | Leadership |
Wei Lin Chiang | Co-Founder & CTO | Leadership |
Complete people profiles for LMArena
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
- Full employee list
- Team structure
- Board tenure
- Professional contacts
Verified entity values are shown only after access is granted.
Timeline of LMArena
3 dated milestones of LMArena across 1 years, from founding to its latest funding, stage changes and deals.
- Founded LMArena is founded.
- Funding First funding round of $100.0M.
- Funding Latest funding round, Series A, of $150.0M.
Web traffic of LMArena
The website of LMArena (lmarena.ai) receives about 24.5M visits a month and ranks #1,733 among all websites worldwide, #307 in Programming and Developer Software.
- Monthly visits24.5M
▼ 3.3% vs previous month
- Unique visitors3.5M
per month
- Global rank#1,733
among all websites
- Category rank#307
Computers Electronics and Technology · Programming and Developer Software
- Bounce rate35%
- Pages per visit6.8
- Average visit9 min 22 sec
- DevicesDesktop 62% · Mobile 38%
Websites whose visitors overlap most with LMArena. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
| lmsys.org | 100% | 278.6K | #192,303 | View details | |
openlm.ai | openlm.ai | 98% | – | #338,060 | – |
| huggingface.co | 91% | 24.9M | #1,689 | View details | |
artificialanalysis.ai | artificialanalysis.ai | 87% | – | #29,027 | – |
| github.com | 86% | 542.6M | #65 | View details | |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 40 similar websites and full traffic analytics for LMArena
The complete similar-websites list, audience overlap and engagement analytics require an active premium plan.
- 40 similar websites
- Audience overlap
- Engagement analytics
- Traffic by brand
Verified entity values are shown only after access is granted.
Similar companies to LMArena
10 companies that operate in the same segment as LMArena (AI Core Platforms & Infrastructure), ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
OpenAI is engaged in developing advanced artificial intelligence technologies. | 2015 | San Francisco, California, United States | USD 167.95 B | – | – | |
AI models and chatbots are offered for industry applications. | 2021 | San Francisco, California, United States | USD 66.81 B | – | – | |
Analytics and digital solutions for healthcare and banking are provided. | 1999 | New York, New York, United States | USD 10 M | USD 2.09 B | 59,500 | |
AI-powered graphical processing units and SoCs | 1993 | Santa Clara, California, United States | USD 5 M | USD 130.5 B | 36,000 | |
A platform for the AI community to collaborate and build. | 2016 | Paris, France | USD 399.91 M | – | – | |
Digital marketing, data analytics, and IT services are provided globally. | 1981 | Bengaluru, Karnataka, India | – | USD 19.08 B | 323,580 | |
Machine learning model development and management solutions are provided. | 2017 | San Francisco, California, United States | USD 250 M | – | 150 | |
Provider of website, web & mobile application development, BI, and digital marketing services | 2007 | Jaipur, Rajasthan, India | USD 570.12 M | USD 102.68 M | 461 | |
AI-based robotic arms are developed for industrial automation tasks. | 2010 | San Francisco, California, United States | USD 123.02 M | – | – | |
Enterprise observability solutions are delivered via cloud and AI platforms. | 2008 | San Francisco, California, United States | USD 196.44 M | – | – |
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Frequently Asked Questions about LMArena
LMArena was founded in 2025.
LMArena is headquartered in San Francisco, United States. It is registered at San Francisco, California, United States.
Anastasios Angelopoulos is the current CEO of LMArena. They have also founded this company.
LMArena is a funded company, having raised a total of $250M across 2 funding rounds to date. The company's 1st funding round was a Seed of $100M, raised on May 2025.
LMArena was founded in 2025 in San Francisco, United States, as an online platform in the AI sector. Users are enabled to input prompts for generating content, explore AI responses through a search engine, and participate in voting to rank outputs. Operations center on facilitating interactions between users and AI-generated materials, with tools provided for content advancement and community engagement.
LMArena has 9 investors. Key investors include Kleiner Perkins, Lightspeed Venture Partners, University of California, Andreessen Horowitz, and Felicis Ventures.
The website of LMArena receives about 24.5 million visits a month and ranks #1,733 among all websites worldwide.