A

Arena

Runs a platform where people chat with and vote between frontier AI models side by side, and sells AI model evaluations built on those human votes to AI labs and enterprises.

StageLate-stage

Founded2025

HeadquartersSan Francisco, USA

StatusPrivate

Product

Selected offerings — the AI products recorded here, not the vendor's full catalogue.

• Arena Application

  Web platform where people compare responses from frontier AI models side by side and vote, producing public leaderboards and a human-preference dataset; the company also sells AI evaluations to labs and enterprises.

Similar products 27

No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.

How this list is ranked ↗

EEvergreen.aiUndisclosedArena and Evergreen.ai both serve buyers who need to use an everyday AI assistant; Evergreen.ai's scale not recorded.Shared product typeCompareHHyperWriteUndisclosedArena and HyperChat both serve buyers who need to use an everyday AI assistant; HyperWrite's scale not recorded.1 of 2 capabilitiesShared product typeCompareNNaverPublicArena and AI Tab both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.Shared product typeCompareQQuoraEarly-stageArena and Poe both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.1 of 2 capabilitiesShared product typeCompareVVeniceLate-stageArena and Venice both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.1 of 2 capabilitiesShared product typeCompareCCerencePublicArena and Cerence Assistant both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.1 of 2 capabilitiesShared product typeCompareMMoveworksAcquiredArena and Moveworks Quick GPT both serve buyers who need to use an everyday AI assistant; Moveworks is acquired, with no independent scale.1 of 2 capabilitiesShared product typeCompareSSuperhumanUndisclosedArena and Superhuman Go both serve buyers who need to use an everyday AI assistant; Superhuman's scale not recorded.1 of 2 capabilitiesShared product typeCompareAAiseraAcquiredArena and GenIQ both serve buyers who need to use an everyday AI assistant; Aisera is acquired, with no independent scale.1 of 2 capabilitiesShared product typeCompareLSLM StudioUndisclosedArena and LM Studio both serve buyers who need to use an everyday AI assistant; LM Studio's scale not recorded.Shared product typeCompareMMicrosoftPublicArena and Microsoft Copilot Chat both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.2 of 2 capabilitiesShared product typeCompareSSapia.aiUndisclosedArena and Phai both serve buyers who need to use an everyday AI assistant; Sapia.ai's scale not recorded.2 of 2 capabilitiesShared product typeCompareYYou.comLate-stageArena and You.com both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.Shared product typeCompareSSlackUndisclosedArena and Slackbot both serve buyers who need to use an everyday AI assistant; Slack's scale not recorded.1 of 2 capabilitiesShared product typeCompareSTSK TelecomPublicArena and A. (Adot) both serve buyers who need to use an everyday AI assistant; SK Telecom's scale not recorded.Shared product typeCompareWWorkdayPublicArena and Workday Learning, powered by Sana both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.1 of 2 capabilitiesShared product typeCompareWWritesonicUndisclosedArena and Chatsonic both serve buyers who need to use an everyday AI assistant; Writesonic's scale not recorded.1 of 2 capabilitiesShared product typeComparePPalantirPublicArena and AIP Assist both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.Shared product typeCompareRARelevance AIEarly-stageArena and Relevance Chat both serve buyers who need to use an everyday AI assistant; Relevance AI's scale not recorded.2 of 2 capabilitiesShared product typeComparePPerplexityLate-stageArena and Perplexity both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.Shared product typeCompareAAmazonPublicArena and Alexa+ both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.1 of 2 capabilitiesShared product typeCompareBByteDanceUndisclosedArena and Doubao (豆包) both serve buyers who need to use an everyday AI assistant; ByteDance's scale not comparable: only a revenue estimate, no market cap or valuation.2 of 2 capabilitiesShared product typeCompareGGlean (Glean Technologies)Late-stageArena and Glean Assistant both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.Shared product typeCompareLLangfuseAcquiredArena and Langfuse Assistant both serve buyers who need to use an everyday AI assistant; Langfuse is acquired, with no independent scale.1 of 2 capabilitiesShared product typeCompareRRingCentralPublicArena and AI Virtual Assistant (AVA) both serve buyers who need to use an everyday AI assistant; scale not comparable: one figure is revenue, the other valuation.Shared product typeCompareNRNous ResearchEarly-stageArena and Nous Simulators both serve buyers who need to use an everyday AI assistant; Nous Research's scale not recorded.1 of 2 capabilitiesShared product typeCompareLALiquid AIUndisclosedArena and Liquid Apollo both serve buyers who need to use an everyday AI assistant; Liquid AI's scale not recorded.Shared product typeCompare

Closest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.

Sources

Stage, from total funding

Company disclosure · 7 Oct 2026

About page: "With $250 million in venture funding from leading investors". Its own posts state the rounds: $100M seed (May 2025) and a $150M Series A (https://arena.ai/blog/series-a, 2026-01-06, led by Felicis and UC Investments).

Valuation

Not found · 7 Oct 2026

Arena's own Series A post and About page state no valuation (a $1.7B figure appears only in press headlines it links).

Founded

Company disclosure · 7 Oct 2026

Company's About page: "In 2025, we formed Arena Intelligence Inc. and raised funding from a16z and The University of California." The platform began as the Berkeley project Chatbot Arena (2023) and was called LMArena before rebranding.

Revenue (ARR)

Company disclosure · 7 Oct 2026 at least

Arena blog, 2026-06-29: "Arena has crossed $100M annualized revenue run rate within eight months of launching our enterprise offering." Stored as the floor it states; a run rate, not trailing revenue.

Public listing

Company disclosure · 7 Oct 2026

Private company: Arena Intelligence Inc., venture-funded (seed and Series A); no public filing.

Description

Company disclosure · 7 Oct 2026

"Arena is an AI evaluation platform where users compare and vote on responses from frontier AI models, forming a human-preference dataset that AI labs use to benchmark and improve their models."

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