Grammarly vs Write Tone

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: Grammarly — $12/mo vs $15.82/mo for Write Tone
Free plan: Both have one
Public API: Write Tone has one; not confirmed by us for Grammarly
Higher Trust score: Grammarly — 94 vs 85 for Write Tone
Best fit: Grammarly: Anyone writing in a browser, Word or email who wants corrections in place · Write Tone: Students and writers who want paraphrasing plus grammar checking in one subscription

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

GrammarlyGrammar, tone and rewriting help inside every app

Write ToneParaphraser, grammar checker and AI-text humaniser bundled with about 30 small writing tools.

Side by side

Fact	Grammarly	Write Tone
Category	Grammar & Proofreading	AI Writing Assistants
Pricing model	Freemium	Freemium
Starts at	$12/mo	$15.82/mo
Public API	Not confirmed	Yes
Trust score	94 / 100	85 / 100
Platforms	Web, Chrome extension, Windows, macOS, iOS, Android	Web, Chrome extension, API
Company	Superhuman	Ibranext Technologies
Launched	2009	2023
Last verified	Oct 16, 2026	Oct 16, 2026

What our research says

Grammarly

Still the default for catching mistakes inside other people's software, but the free tier has quietly become an AI-prompt meter and the honest price is $30 unless you commit to a full year.

Pros

Runs inside the apps people already write in rather than as a separate editor
Free tier still covers spelling, grammar and tone detection with no time limit
Pro folds in plagiarism and AI-text detection that rivals charge for separately

Cons

The $12 headline is the annual rate; paying monthly costs $30
Free AI allowance is 100 prompts a month and depletes quickly
No public API, so it cannot be embedded in another product
Enterprise pricing is not published anywhere on the site

Write Tone

Good value if you actually use several of the tools - unlimited paraphrasing, grammar checking and summarising for about $16 a month undercuts buying them separately. The honesty problem is that the same subscription sells plagiarism detection and a detector-evasion rewriter side by side, which tells you who the real customer is. Treat the 637,000-user claim as marketing.

Pros

Around 90 tone presets on the paraphraser, across 50+ languages
Grammar checking, summarising and plagiarism checking included in the same plan
Chrome extension and Microsoft Word integration, not web-only
Documented API endpoint for programmatic access
Free tier is a real 100,000 characters a month rather than a trial

Cons

Sells detector-evasion and plagiarism detection in the same subscription
No company country or registered address published
Free tier carries ads and throttles the humaniser and summariser
Tool count is inflated by many near-identical single-purpose pages

Which one fits

Choose Grammarly if you need

Anyone writing in a browser, Word or email who wants corrections in place
Teams enforcing a house style guide across people who are not writers
Non-native English speakers who want fluency rewrites, not just error flags

Choose Write Tone if you need

Students and writers who want paraphrasing plus grammar checking in one subscription
Non-native writers adjusting tone across many languages
People who want a Chrome extension rather than another browser tab