HyperWrite vs Lex

HyperWrite

• People who write in Chrome and want inline sentence completions
• Drafting email replies and other routine text with AI tools
• Students and researchers who need cited sources while drafting

Lex

• Writers who want AI feedback on a draft instead of generated text
• People looking for a simpler shared-document editor with AI built in
• Trying several AI models on the same piece without separate subscriptions

HyperWrite

• Premium is capped at 250 AI messages a month; unlimited messages need Ultra at $29 a month billed annually.
• The Free account gets limited monthly credits and only the basic AI model.
• The only browser extension listed is for Chrome, and no desktop or mobile apps are listed.
• Month-to-month billing costs more: $19.99 for Premium and $44.99 for Ultra.

Lex

• Free accounts get 30 Ask Lex messages a day, 5 saved-prompt runs a month and a small daily AI budget; premium models need Lex Pro.
• Lex Pro's AI use is metered: the plan includes $30 of AI credits a month, and heavier use can be covered by overage credits sold at cost.
• Lex runs in a desktop or mobile browser. An iOS app is offered to Pro subscribers as early access, and no desktop app is listed.
• Track changes is marked as coming soon on the homepage.

HyperWrite

TypeAhead

The Chrome extension suggests the next words in line as you type on websites; pressing Tab accepts a suggestion. It adapts to your tone the more it is used.

AutoWrite and AI tools

AutoWrite drafts a paragraph on request, and a library of hundreds of single-purpose tools covers jobs such as rewriting text, replying to email and writing speeches.

HyperChat

A chat with the assistant for research, brainstorming and problem solving, with citations and real-time information on paid plans.

Scholar AI

Searches millions of scholarly articles and papers for a topic and returns results backed by citations to peer-reviewed sources.

AI Document Editor

A document editor whose built-in chat can see the current draft, give feedback, find sources and apply changes to the text itself.

Custom personas and tools

Personas make the AI write in your own style, 3 on Premium and 10 on Ultra, and custom tools can be built for a recurring workflow.

Lex

Ask Lex

A chat panel for feedback, rewrites and brainstorming on the open document. Highlighting text, or tagging @Lex in a comment, asks about one passage. The AI model can be switched.

Checks

Runs line edits for brevity, grammar, readability and more, shown as highlights in the document. Clicking one shows the suggested edit and the reason for it.

Custom prompts and context

Saved prompts can be reused in Ask Lex and Checks and shared with others. Style guides and knowledge bases give the AI a voice to follow and background to draw on.

Versions and Rewind

Versions are named save points for trying another approach. Rewind is a timeline at the top of a document for scrubbing through past changes and restoring an earlier state.

Live collaboration and comments

A shared link gives edit or view-only access, with co-editing in real time and comment threads. Lex Teams is a paid add-on for unlimited group use of shared folders.

Export and API

Documents export to Word, PDF, Markdown, HTML and LaTeX, and an API can create, list and update documents with a key generated in settings.

HyperWrite

• Free$0

  A limited number of monthly credits on HyperWrite's basic AI.

• Premium$16

  per month, billed annually ($192); $19.99 billed monthly

  250 AI messages a month, citations and real-time information, 3 custom personas, the library of AI tools and unlimited TypeAheads.

• Ultra$29

  per month, billed annually ($348); $44.99 billed monthly

  Unlimited AI messages, 10 custom personas, unlimited TypeAheads and first access to experimental writing and agent features.

Lex

• Free$0

  Documents, sharing and live collaboration with 30 Ask Lex messages a day, 5 saved-prompt runs a month and a small daily AI budget.

• Lex Pro$14.99

  per month, billed yearly ($179.88); $24.99 billed monthly

  Premium AI models, $30 of included AI credits a month, much higher usage limits, priority support, early access to new features and a money-back guarantee.

HyperWrite

• Annual discount

  Lower monthly rate with annual billing

  The pricing page labels annual billing as saving 20%. Premium drops from $19.99 to $16 a month ($192 a year) and Ultra from $44.99 to $29 ($348 a year).

Lex

• Annual discount

  40% less with yearly billing

  Lex Pro billed yearly is $179.88, which works out to $14.99 a month against $24.99 when billed monthly.

• Education

  Discounted pricing for students and academics

  Lex says it offers discounted pricing for students and academics, arranged by emailing the company. The size of the discount is not published.

• Nonprofit

  Discounted pricing for nonprofits

  Lex says it offers discounted pricing for nonprofit organizations, arranged by emailing the company. The size of the discount is not published.