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.

The short answer

Cheaper paid plan: Wordtune — $4.89/mo vs $9.99/mo for Compose AI
Free plan: Both have one
Best fit: Compose AI: Heavy email writers who churn out routine replies in Gmail · Wordtune: Non-native English writers who need a sentence to read naturally, not be rewritten wholesale
Platforms: Compose AI: Chrome extension · Wordtune: Web, Chrome extension, iOS
Trust score: About even — Compose AI 96, Wordtune 96

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

Compose AIFree Chrome extension that autocompletes sentences and email replies as you type across the web

WordtuneSentence rewriter that keeps the meaning you intended

Side by side

Fact	Compose AI	Wordtune
Category	AI Writing Assistants	Paraphrasing & Rewriting
Pricing model	Freemium	Freemium
Starts at	$9.99/mo	$4.89/mo
Trust score	96 / 100	96 / 100
Platforms	Chrome extension	Web, Chrome extension, iOS
Company	Compose AI, Inc.	AI21 Labs
Launched	2021	2020
Last verified	Oct 16, 2026	Oct 15, 2026

What our research says

Compose AI

A low-friction way to speed up routine email and doc writing: the free tier installs in a minute and completes sentences anywhere in Chrome. The extension is still being updated, but its free caps are small and browser-native AI features now cover much of the same ground at no cost, so the paid tiers have to earn their place.

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
Annual billing cuts the Premium price by a third

Cons

Chrome-only, with no public API or desktop apps found
Free plan caps AI writing at 1,500 words a month
Marketing site copy and copyright are still dated 2024, which makes the product look less maintained than its store listing suggests

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