Lex - 2026 Pricing, Features, Reviews & Alternatives

Lex is a cloud-based AI word processor designed for individual writers, content creators, academics, students, and teams who produce documents that go through an edit process. AI assistance is embedded directly inside the document, supporting brainstorming, outlining, drafting, revision, and feedback without displacing the writer's voice. An iOS mobile app extends access beyond the desktop. Lex is used across general writing, marketing copy, newsletters, academic papers, fiction, and customer-facing content.

Core AI capabilities include an in-document Chat panel for brainstorming and organizing thoughts, Ask Lex inline comments that are context-aware of the full document rather than only selected text, AI Checks for writing improvement suggestions, one-click AI title generation, and AI shortcuts for word choice and idea generation. Writers can build and save custom prompts via Prompt Builder and Prompt Library, define Style Guides by uploading writing samples, and configure Knowledge Bases to give the AI persistent background context for personalized suggestions. Lex routes requests through enterprise APIs to multiple large language models from OpenAI, Anthropic, and TogetherAI, including GPT-4.1 and Claude models, with user-selectable model switching. A single subscription covers access to all available models.

Document management features include versioning with side-by-side version comparison and content recovery, real-time collaboration via shareable links with no app download required for collaborators, and read-only sharing links. Focus mode reduces UI distractions during writing sessions. Integrations with Kit (formerly ConvertKit) and Google Drive connect Lex to publishing and storage workflows, and a simple API supports custom integrations. Discounted pricing is available for nonprofits, students, and academics. Team plans with collaborative features are available for organizations. User data is privately hosted and not used to train language models.