SynthID
deepmind.google
Google's invisible watermark for AI content
Alternatives to SynthID
GPTZero
gptzero.me
Detects AI-written text
Pangram
pangram.com
High-accuracy AI text detection
Originality.ai
originality.ai
AI and plagiarism detection for publishers
Copyleaks
copyleaks.com
AI content and plagiarism detection
Winston AI
gowinston.ai
AI text and image detection for schools
ZeroGPT
zerogpt.com
Free AI text detector