Grammarly vs Lex: pricing, features and which to choose

Grammarly is a writing-assistance product made by Superhuman, the company formerly known as Grammarly. The company says Grammarly was founded in 2009 and serves more than 40 million people and 50,000 organizations. On October 29, 2025, it announced a name change to Superhuman while retaining Grammarly, Coda, Mail, and Superhuman Go as products in the broader suite. Grammarly therefore remains focused on writing support rather than becoming a separate foundation-model vendor. In May 2025, the company announced $1 billion in growth financing from General Catalyst and said revenue had exceeded $700 million. It also announced Coda’s acquisition in January 2025 and an agreement to acquire Superhuman in July 2025, placing Grammarly inside a larger product family.

Grammarly works inside supported applications, websites, browsers, and documents. A typical session involves writing text, reviewing inline spelling and grammar suggestions, and applying recommendations for tone, clarity, fluency, inclusive language, or citation consistency when the plan supports those capabilities. Pro adds full-sentence rewrites, tone adjustment, plagiarism detection, and AI-generated-text detection. Team features include style guides, brand tones, knowledge sharing, snippets, and analytics, helping organizations make writing more consistent. Grammarly says the product works across more than 1 million applications and websites. Docs provides a dedicated writing space, while newer agents can help users draft, revise, research, and receive audience feedback without opening a separate application. This broad coverage is central to its everyday writing-assistance approach.

The main limitation is the need to allow an AI service into many writing contexts. For individual accounts, Product Improvement and Training is enabled by default, although users can opt out. Microsoft Editor and Copilot fit organizations centered on Microsoft 365, while Google Docs with Gemini fits teams working mainly in Google Workspace. LanguageTool and ProWritingAid focus more narrowly on correction and style assistance. Grammarly is a strong choice for people who want correction, rewriting, tone guidance, detection features, and broad application coverage in one service. However, organizations should review account controls and content policies before using it for confidential work. Users seeking an open-source or self-hosted checker may also find Grammarly unsuitable, since the profile identifies it as neither.

Lex is an AI-focused word processor founded by Nathan Baschez and spun out of Every. TechCrunch reported a $2.75 million seed round led by True Ventures on August 23, 2023, after Lex attracted about 25,000 sign-ups during its first day. Lex’s 2024 annual letter reported 47,000 users making 15 million edits across 400,000 documents, alongside more than 14 trillion language-model tokens processed. The product targets substantial writing and revision rather than standalone text generation. It combines a document editor with AI assistance, comments, shared documents, folders, and model selection. Its current pricing page says Lex is no longer accepting new customers, which materially changes its usefulness for new buyers while existing accounts continue working. Lex remains positioned around AI-assisted writing inside an integrated word-processing workspace.

Lex’s workflow keeps drafting, reference material, conversation, and revision in one browser-based writing environment. Users can write documents, collaborate through comments and sharing, open Ask Lex, attach files or PDFs, and request ideas, counterarguments, rewrites, summaries, or feedback on selected text. Context tags collect reusable background information from files, URLs, Lex documents, and folders, then let users add that material to chats when needed. The 2024 annual letter describes context tags as buckets of reusable information that can be shared across teams, allowing one person to maintain reference material for others. Checks provide inline suggestions, including a Brevity Check, while folders organize documents and shared work. The workflow is aimed at writers who want AI to support judgment, editing, research, and iteration rather than replace authorship.

Lex’s main caveat is availability: new customers cannot subscribe according to the current pricing page, while existing accounts continue working. The free plan’s complete numerical limits are not publicly stated, and Pro usage limits are described as generous rather than given as a fixed quota. Lex’s privacy notice says it collects documents, comments, chat inputs, assistant outputs, account information, usage information, and related metadata. Its terms grant Lex a license to operate the service and provide personalized suggestions, while stating that uploaded content is not used to train its models. Google Docs, ChatGPT, and Grammarly are named direct competitors, with Notion AI, Hemingway Editor, and Writer also relevant alternatives. Existing Lex users should pick it when integrated document editing and reusable context matter most.