H
HReadability editor that flags wordy, unclear writing and offers AI fixes
From $8.33/mo
LanguageTool vs Spinbot
Pricing, features, platforms and who each one suits — side by side.
L
Choose LanguageTool if…
- you need an API to build on
- you want open source you can self-host or audit
- you work on Chrome, Windows, macOS
- you're in its core audience: students, professional writers
S
Choose Spinbot if…
- you're in its core audience: students, bloggers
Side by side
Feature LanguageTool Spinbot
Pricing modelFreemiumFree
Starting price—Free
Free plan
Free trial
API
Open source
Trains AI on your contentNo—
Security and complianceGDPR—
Tone adjustment—
Non-English checking—
Word/Google Docs add-in—
Browser extension—
Custom style guide—
PlatformsWeb, Chrome, Windows, macOS, iOS, APIWeb
CategoryGrammar & ProofreadingParaphrasing & Rewriting
CompanyLearneo, Inc.—
Based inUnited States—
Founded2003—
Part of——
Key features
L LanguageTool
- Grammar, spelling, punctuation and style checking
- AI sentence paraphrasing in several tones
- Support for 30+ languages and dialects
- Browser add-ons for Chrome, Edge, Firefox, Opera, Safari
- Plugins for Google Docs, Word, Pages, LibreOffice
- Personal dictionary and Picky Mode
- Team style guides and shared dictionaries
- Proofreading API with daily call-limit plans
S Spinbot
- Paraphrasing and text rewriting
- Up to 10,000 characters per use
- AI summary generator
- Grammar checker
- Spell and punctuation checker
- Online proofreader and essay checker
- No registration needed
Plans and prices
From each vendor's site. Prices change — confirm before buying.
LanguageTool
BasicFree
PremiumPrice not shown on page
TeamsPrice not shown on page
BusinessCustom
Spinbot
FreeFree
Strengths and limitations
LanguageTool
- Free Basic plan is available
- Supports 30+ languages and dialects
- Many integrations, including browsers, office suites and email clients
- Source code is published on GitHub
- Free plan is limited to 2,000 characters per text field
- Free plan allows only 3 AI rephrasings per day
- Prices did not display on the pricing pages
- Outlook add-on is still in beta
Spinbot
- Free to use without sign-up
- Handles up to about 1,000 words per use
- Several writing tools on one site
- Free version shows ads
- Ad-free version price not listed on the pages
- 10,000-character limit per use
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POnline AI paraphrasing tool with multiple rewriting modes in 20+ languages
Free, from $3.96/mo
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Built from each vendor's public website; we haven't tested them hands-on. Editorial policy