Compose AI vs Jetwriter AI

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: Compose AI — $9.99/mo vs $18/mo for Jetwriter AI
Free plan: Both have one
Higher Trust score: Compose AI — 96 vs 77 for Jetwriter AI
Best fit: Compose AI: Heavy email writers who churn out routine replies in Gmail · Jetwriter AI: High-volume email and LinkedIn reply drafting
Platforms: Compose AI: Chrome extension · Jetwriter AI: Web, Chrome extension

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

Jetwriter AIBrowser extension that drafts emails and replies anywhere

Side by side

Fact	Compose AI	Jetwriter AI
Category	AI Writing Assistants	Email Writing
Pricing model	Freemium	Freemium
Starts at	$9.99/mo	$18/mo
Trust score	96 / 100	77 / 100
Platforms	Chrome extension	Web, Chrome extension
Company	Compose AI, Inc.	Jetwriter AI
Launched	2021	2022
Last verified	Oct 16, 2026	Oct 16, 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

Jetwriter AI

The right shape if your writing happens inside Gmail, LinkedIn and support tools and you resent tabbing out to a chat window. For long-form documents it is the wrong tool entirely.

Pros

Learns tone from your own Gmail history rather than a generic style picker
Three model vendors covered by a single subscription
Works on arbitrary web pages, not just a fixed list of supported apps
Free tier is genuinely usable for occasional drafting

Cons

Free plan is 15 responses a month with no advanced-model access
$18/month is steep beside assistants already bundled into Gmail and Outlook
No developer API
Safari and Firefox builds still have not shipped

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 Jetwriter AI if you need

High-volume email and LinkedIn reply drafting
Support agents composing responses inside Zendesk or Outlook
People who want GPT, Claude and Gemini from one extension