Company record
LMArena
Updated November 2, 2026 · Presspool
Arena runs a public AI ranking and LLM leaderboard and positions itself as an evaluation platform for frontier AI. arena.ai
Funding
Latest announced financing: $200 million, Series B, led by Lightspeed Venture Partners and Khosla Ventures, announced October 8, 2026.
- $200 million Series B, announced October 8, 2026. Led by Lightspeed Venture Partners and Khosla Ventures. At a $3.1 billion valuation; Salesforce Ventures and 01 Advisors participated. Listed in the AI startup funding roster for October 5–10, 2026. Sources: Arena announcement, Unite.AI.
- $150M Series A, announced January 6, 2026. Led by Felicis and UC Investments. Sources: arena.ai.
The 2 rounds on Presspool's record add up to $350 million, announced between January 6, 2026 and October 8, 2026. Rounds the record does not hold are not counted.
Of the 31 Series B rounds with exactly stated amounts in dollars on Presspool's weekly rosters since September 21, 2026, LMArena's $200 million is the 3rd largest; their median is $52.5 million.
Whether AI names LMArena
- On the AI infrastructure map: named or cited in 1 of 50 answers to Presspool's AI infrastructure questions on November 2, 2026 (ChatGPT 0 of 8, Claude 0 of 8, Perplexity 1 of 8, Gemini 0 of 8, Copilot 0 of 8, Google AI Mode 0 of 6, Google AI Overviews 0 of 4). See the map. Of the 54 companies on the map, LMArena ranked joint 23rd by answers naming or citing it in that sample. The other companies AI names most on AI infrastructure questions: Lambda (17 of 50), Crusoe (13 of 50), Together AI (11 of 50), Fireworks AI (10 of 50), Groq (10 of 50), LangChain (10 of 50) and Modal (10 of 50). Most often named in the same answers: Daytona (1), Fireworks AI (1), Fluidstack (1), GMI Cloud (1), Groq (1).
- Machine Relations Index: Cited in 0 of 36,189 Index answers, May 10, 2026 to November 6, 2026.
Week by week
Answers that named or cited LMArena in each weekly sample of Presspool's AI infrastructure questions, by the Monday of the sample week. A row is added every week.
| Week of | AI infrastructure |
|---|---|
| September 21, 2026 | 0 of 39 |
| October 5, 2026 | 1 of 48 |
| October 12, 2026 | 3 of 50 |
| October 19, 2026 | 0 of 56 |
| October 26, 2026 | 0 of 53 |
| November 2, 2026 | 1 of 50 |
Related records
Also on the AI infrastructure map: Arcade, Baseten, Braintrust, Clockwork.io, Crusoe, Daytona, DeepInfra, Encord, Exa, fal, Fiddler AI, Firecrawl and 41 more on the map.
Closest rounds in the roster for October 5–10, 2026: Nous Research ($90 million Series B, October 7, 2026), Mecka ($60 million Series B, October 7, 2026), Stuut ($52.5 million Series B, October 7, 2026), Namespace ($42 million Series B, October 5, 2026), Hadrian ($40 million Series B, October 6, 2026), KONST ($30 million Series B, October 9, 2026).
Lightspeed Venture Partners, which led its round of October 8, 2026, also led Harvey ($550M, round type not disclosed, September 9, 2026), Sandstone ($30M Series A, June 9, 2026) and Inferact ($150 million Seed, January 22, 2026). It is also named as an investor in Different ($48 million Seed, October 20, 2026), Avarra ($17 million Series A, October 6, 2026) and Inworld AI ($50 million, round type not disclosed, August 2, 2023).
Khosla Ventures, which led its round of October 8, 2026, also led Arda Industries ($160 million Series A, October 20, 2026), Norm Ai ($120M Series C, July 7, 2026), PolyAI ($86M Series D, December 15, 2025), General Intuition ($133.7M Seed, October 16, 2025), Genesis AI ($105 million Seed, July 1, 2025) and Genie AI ($17.8M Series A, October 23, 2024). 3 more of its rounds are on its page.
Salesforce Ventures, named as an investor in its round of October 8, 2026, led Rocket ($15 million Seed, September 22, 2025). It is also named as an investor in Numeral ($100 million Series C, September 23, 2026).
Felicis, which led its round of January 6, 2026, also led DeepJudge ($41.2M Series A, November 4, 2025) and Mercor ($350M Series C, October 27, 2025). It is also named as an investor in Phonic ($27.5 million Series A, October 29, 2026) and Arda Industries ($160 million Series A, October 20, 2026).
UC Investments, which led its round of January 6, 2026, also led TEKEVER ($580 million Series D, September 23, 2026).