Lex
Free tierCollaborative documents, with powerful AI editing tools.
Free tier available·All audiences·Powered by OpenAI, Anthropic, TogetherAI
Key strengths
AI feedback and editing toolsLive collaboration with no app download requiredMinimalist writing interfaceVersion historyAccess to best-in-class LLMs (GPT-4.1, Claude)Publishing and read-only link sharingAI commands (title ideas, word suggestions, list generation)Enterprise-grade privacy via OpenAI/Anthropic/TogetherAI enterprise APIs
Free tier + paid plans
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Lex — Technical Use Cases
Lex is best suited for developer-adjacent or technically literate users who need a lightweight, AI-augmented document layer without building or maintaining their own LLM pipeline:
- Content teams at tech companies: Use Lex's live collaboration and AI editing tools (backed by GPT-4.1 and Claude) to draft, review, and iterate on technical documentation, blog posts, or marketing copy — all within a single browser-based environment.
- Researchers and academics: Leverage AI feedback tools and version history to iteratively refine papers and reports, with enterprise-grade privacy ensuring sensitive content is handled appropriately.
- Teams requiring multi-model flexibility: Lex's integration with OpenAI, Anthropic, and TogetherAI means users on the Pro plan can access best-in-class models without managing API keys or infrastructure.
- Distributed teams: Browser-native real-time collaboration and read-only link sharing eliminate the need for additional tooling or client deployment.
- Privacy-conscious organizations: Enterprise API agreements with all three model providers offer a documented privacy posture suitable for professional use.