Alternatives · AI Detection
GPTZero alternatives
The closest alternatives to GPTZero are Originality.ai, Grammarly and QuillBot, which also cover checking for plagiarism and checking grammar and spelling. 6 of the 8 listed here can be used for free, including Originality.ai and Grammarly. The lowest paid plan starts at $4.89 per month (Wordtune).
- Alternatives
- 8
- Free options
- 6
- Updated
- Nov 2026
Closest first: ordered by how many of GPTZero's tasks each tool shares, then by popularity.
- 1
Originality.aiVerifiedFree tier · from $12.95/mo
Checks text for AI-written content and plagiarism for writers, editors, teachers, and publishers.
Also does:Checking for plagiarismChecking grammar and spelling
Web · Browser extension
- 2
GrammarlyVerifiedFree tier · from $12/mo
An AI writing assistant that checks grammar, tone, and clarity for individuals, teams, and organizations.
Also does:Checking grammar and spellingChecking for plagiarism
Web · Windows · Mac · Android · iOS
- 3
QuillBotFree tier
Paraphrasing and writing tool that rewrites text in several modes with grammar checking built in.
Also does:Checking grammar and spelling
Web · Browser extension
- 4
SurferVerifiedPaid · from $49/mo
SEO and AI search visibility platform for teams that want their content cited in Google and in AI answers.
Also does:Checking for plagiarism
API
- 5
WordtuneVerifiedFree tier · from $4.89/mo
AI writing assistant for students and professionals to rewrite, proofread, summarize, and translate into English.
Also does:Checking grammar and spelling
Browser extension
- 6
AnywordVerifiedFree trial · from $49/mo
AI content platform that scores marketing copy before your team publishes it.
Also does:Checking for plagiarism
Web · API · Browser extension
- 7
Hemingway EditorFree tier
Readability editor that highlights hard-to-read sentences, passive voice and adverbs in your writing.
Also does:Checking grammar and spelling
Web · Mac · Windows
- 8
SuperhumanVerifiedFree tier · from $12/mo
AI assistant and work suite for individuals and teams, with agents in tabs, email, and docs.
Also does:Checking grammar and spelling
Web · Browser extension
At a glance
| Tool | Pricing | Free | Platforms | API | Checked |
|---|---|---|---|---|---|
| GPTZero | Free tier | Yes | Web, Browser extension | Yes | Nov 4, 2026 |
| Originality.ai | Free tier · from $12.95/mo | Yes | Web, Browser extension | Yes | Nov 4, 2026 |
| Grammarly | Free tier · from $12/mo | Yes | Web, Windows, Mac, Android, iOS | No | Nov 3, 2026 |
| QuillBot | Free tier | Yes | Web, Browser extension | No | — |
| Surfer | Paid · from $49/mo | No | API | Yes | Nov 4, 2026 |
| Wordtune | Free tier · from $4.89/mo | Yes | Browser extension | No | Nov 4, 2026 |
| Anyword | Free trial · from $49/mo | No | Web, API, Browser extension | Yes | Nov 4, 2026 |
| Hemingway Editor | Free tier | Yes | Web, Mac, Windows | No | — |
| Superhuman | Free tier · from $12/mo | Yes | Web, Browser extension | No | Nov 4, 2026 |
Common questions
- What is the best alternative to GPTZero?
- Originality.ai is the closest match: it also covers checking for plagiarism and checking grammar and spelling. Grammarly and QuillBot come next. Alternatives are ordered by how many of GPTZero's tasks they share, then by how popular they are.
- Is there a free alternative to GPTZero?
- Yes. Originality.ai, Grammarly and QuillBot can be used for free. Originality.ai has a free plan, and paid plans start at $12.95 per month.
- What is the cheapest alternative to GPTZero?
- Among paid plans, Wordtune starts lowest at $4.89 per month.
- Which GPTZero alternatives have a mobile app?
- Grammarly has an iPhone or Android app.