G
GOriginality.ai vs ProWritingAid
Pricing, features, platforms and who each one suits — side by side.
O
Choose Originality.ai if…
- you need an API to build on
- you're in its core audience: content publishers, marketing agencies
P
Choose ProWritingAid if…
- you work on macOS, Windows
- you're in its core audience: novelists and fiction writers, self-published authors
Side by side
Feature Originality.ai ProWritingAid
Pricing modelFreemiumFreemium
Starting price$12.95/mo—
Free plan
Free trial
API
Open source
Cost per 1,000 words processed$0.065—
Trains AI on your contentYes, unless you opt outNo
Data retentionScan history kept 30 days (Pro) or 365 days (Enterprise)Analysed text deleted after checking; only explicitly saved documents are kept
Security and compliance—GDPR
Sentence-level highlights—
Plagiarism checker—
Writing replay—
Bulk processing—
Shareable reports—
Docs/LMS integration—
PlatformsWeb, Chrome, APIWeb, macOS, Windows, Chrome
CategoryAI Detection & HumanizersGrammar & Proofreading
CompanyOriginality AI Inc.Orpheus Technology Ltd
Based inCanadaUnited Kingdom
Founded20222013
Part of——
Key features
O Originality.ai
- AI text detection with sentence-level highlights
- Plagiarism checker
- Fact and AI hallucination checker
- Grammar and readability checkers
- Bulk Scan for many documents
- Writing Replay showing how a document was written
- Deep Scan editing suggestions
- Shareable reports and PDF downloads
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
Plans and prices
From each vendor's site. Prices change — confirm before buying.
Originality.ai
FreeFree
Pro$14.95/mo, or $12.95/mo billed yearly ($155.40/yr)
Enterprise$179/mo, or $136.58/mo billed yearly ($1,638.96/yr)
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
Strengths and limitations
Originality.ai
- Free tier includes AI, plagiarism, grammar and fact checks
- Pro plan starts at $12.95/mo billed yearly
- Integrations for Chrome, Firefox, Google Docs, Moodle and Google Classroom
- Detects text that was paraphrased with AI
- API access only on the $179/mo Enterprise plan
- Credit-based usage: 1 credit equals 100 words
- Pricing page gives conflicting details on free credits and Pro scan history
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
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Built from each vendor's public website; we haven't tested them hands-on. Editorial policy