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Compose AI vs Wordtune

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Wordtune publishes a starting price ($4.89); Compose AI does not. Both have a free tier.

Compose AIFree Chrome extension that autocompletes sentences and email replies as you type across the webWordtuneSentence rewriter that keeps the meaning you intended

Side by side

FactCompose AIWordtune
CategoryAI Writing AssistantsParaphrasing & Rewriting
Pricing modelFreemiumFreemium
Starts at—$4.89 month
Public APINoNo
PlatformsChrome ExtWeb, Chrome Ext
CompanyCompose AI, Inc.AI21 Labs
Launched20212020
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Compose AI

A low-friction way to speed up routine email and doc writing, since the free tier installs in a minute and completes sentences anywhere in Chrome. The catch is stagnation risk: the site's own copyright is frozen at 2024 and browser-native AI features increasingly do the same job for nothing.

Pros

  • Basic extension is free with no time limit
  • Autocomplete works across most web text fields, not one app
  • Learns personal writing style for suggestions

Cons

  • Chrome-only, with no API or desktop apps
  • Official pricing was unreadable in this check, an odd sign for a paid product
  • Site freshness signals suggest limited ongoing development

Wordtune

Wordtune still does the one thing it was built for better than the general assistants do, but its owner is in visible trouble and the product has not shipped news in two years. Cheap and useful today, risky as a dependency.

Pros

  • Rewrites preserve intent instead of paraphrasing into something else, which is the whole point
  • In-place browser extension avoids the copy-paste round trip
  • Cheapest tier is under $5 a month on annual billing

Cons

  • Parent AI21 Labs is in financial distress: a $300M round never closed, acquisition talks with NVIDIA and then Nebius, and reported layoffs above 60%
  • The product blog has not been updated since June 2024 and the site footer still reads 2025
  • AI21's own site no longer mentions Wordtune anywhere, suggesting it is no longer a strategic product
  • Free tier's 10 rewrites a day is exhausted in a single editing session

Which one fits

Choose Compose AI if you need

  • Heavy email writers who churn out routine replies in Gmail
  • Non-native English speakers who want inline phrasing help
  • Anyone testing writing autocomplete without paying

Choose Wordtune if you need

  • Non-native English writers who need a sentence to read naturally, not be rewritten wholesale
  • Anyone editing inside Gmail, Docs or LinkedIn who wants suggestions in place
  • Light users, since the free tier is genuinely usable for occasional rewriting

More comparisons

All Compose AI alternatives →All Wordtune alternatives →Browse all AI Writing Assistants →