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Chai Research's AI character chat app with millions of community characters
ChaiAvailable on App Store & Google Play· 2021
Product Type
Software
Platform
AppleAndroid
Languages
English
Regions
Global
Pricing
Freemium
Price
Free (ad-supported)
Premium $13.99/mo
Ultra $29.99/mo
Free Trial
✓ Trial Available
免費版每 3 小時 70 條訊息（含廣告）
Last updated 2026-07-17· Content established
This product has no official website. Check it out on:
About This Tool
Chai (mobile) is the AI character chat app by Chai Research Corp, available on iOS and Android, with 2026 ARR exceeding $100M. Users chat with millions of community-created characters or build their own (name, avatar, backstory, opening message). Powered by proprietary in-house LLMs optimized via RLHF/DPO, with dedicated suicide/self-harm classifiers deployed in late 2025 for safety. Free tier: 70 messages every 3 hours with ads; Premium/Ultra unlock unlimited messages and faster responses. Note: Chai App and the Web platform (chai-ai.com) are completely independent — accounts and subscriptions do not carry over.
Background
Chai Research Corp was founded in 2021 by William Beauchamp in Palo Alto, CA. The Chai mobile app is the company's core product, available on the iOS App Store and Google Play. It operates as an independent platform from the web version at chai-ai.com (separate accounts and subscriptions). 2026 ARR exceeded $100M with a ~$2.4B valuation, backed by CoreWeave and AMD.
Technology
Powered by Chai Research's proprietary LLMs, optimized via RLHF and DPO — reportedly achieving 68% engagement improvement over GPT-3.5 baselines. Features include character creation, message regeneration, and character response editing. Dedicated suicide/self-harm classifiers deployed late 2025, aligned with EU AI Act and NIST AI RMF.
Market
2026 ARR ~$100M, valuation ~$2.4B. 10M+ global monthly active users, 1B+ monthly messages. 17+ rating, worldwide distribution.
Best For
iOS or Android users who prefer a native app experienceUsers who enjoy swiping through community characters for light chatMobile players who need character creation tools on the go
Editorial Note
Chai Research's mobile AI character app with a rich community library. Account separation from the web version is the main friction point.
Strengths
- + Millions of community characters — a vast library
- + Proprietary LLM with RLHF/DPO optimization
- + $100M+ ARR validates the business model
- + Simple no-code character creation tools
Drawbacks
- − App and Web accounts/subscriptions are completely separate
- − Free tier limited to 70 messages every 3 hours
- − Limited conversation depth and weak long-term memory
Value Assessment：Free tier with ads, 70 messages every 3 hours. Premium at $13.99/month suits moderate users. If you prefer browser-based use, try the Web version at chai-ai.com instead.
External Resources
FAQ
Chai App 和 Chai Web 有什麼區別？
兩者是 Chai Research 的獨立產品線——App（iOS/Android）和 Web（chai-ai.com）使用完全獨立的帳號體系和訂閱系統，數據不共享。在 App 端購買的 Premium/Ultra 無法在 Web 端使用，反之亦然。選擇你最常使用的平台即可，不需要兩邊都付費。
Chai 免費版有什麼限制？
免費版每 3 小時可發送 70 條訊息，對話中會顯示廣告。訂閱 Premium（$13.99/月）解鎖無限制訊息和更快回應速度，Ultra（$29.99/月）進一步提升模型品質和優先級。App 和 Web 的定價方案略有不同——Web 端提供週訂閱（$9.99/週）而非月訂閱。
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