H
HReadability editor that flags wordy, unclear writing and offers AI fixes
From $8.33/mo
ProWritingAid vs Spinbot
Pricing, features, platforms and who each one suits — side by side.
P
Choose ProWritingAid if…
- you work on macOS, Windows, Chrome
- you're in its core audience: novelists and fiction writers, self-published authors
S
Choose Spinbot if…
- you're in its core audience: students, bloggers
Side by side
Feature ProWritingAid Spinbot
Pricing modelFreemiumFree
Starting price—Free
Free plan
Free trial
API
Open source
Trains AI on your contentNo—
Data retentionAnalysed text deleted after checking; only explicitly saved documents are kept—
Security and complianceGDPR—
AI rewrites—
Tone adjustment—
Plagiarism checker—
Word/Google Docs add-in—
Custom style guide—
PlatformsWeb, macOS, Windows, ChromeWeb
CategoryGrammar & ProofreadingParaphrasing & Rewriting
CompanyOrpheus Technology Ltd—
Based inUnited Kingdom—
Founded2013—
Part of——
Key features
P ProWritingAid
- Grammar, spelling and punctuation checker
- 25+ writing analysis reports
- Rephrase tool for rewriting sentences
- Chapter Critique and full manuscript analysis
- Story Canvas and Outline Crafter for planning
- Comparison of your writing style with 90 fiction authors
- Integrations with Word, Google Docs, Scrivener and browsers
- Custom style guide and dictionary
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.
ProWritingAid
Free€0
Premium€30/mo monthly, €10/mo billed yearly (€120), or €399 lifetime
Premium Pro€36/mo monthly, €12/mo billed yearly (€144), or €699 lifetime
Spinbot
FreeFree
Strengths and limitations
ProWritingAid
- Free plan with grammar checks and daily Rephrases
- Lifetime purchase option on paid plans
- Works in Word, Google Docs, Scrivener and major browsers
- Discount available for students
- Free plan analyzes only 500 words at a time
- Supports English only
- Monthly plans are not refundable, and the money-back guarantee on other plans lasts only 3 days
- In-depth manuscript analysis needs separately purchased Story Credits
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
More comparisons
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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