| What it analyzes | Video and audio — YouTube, TikTok, Instagram Reels, podcasts via link, or live in the browser extension while you watch | Written text you paste or upload, plus text inside the Grammarly editor |
| Detects AI-written prose | No — BSmeter does not score written text for AI authorship | Yes — this is its core job. Returns a percentage score, trained on large samples of human and AI text, built to work across ChatGPT, Gemini, Claude and others |
| Fact-checks claims against live sources | Yes — every verifiable claim gets a 0-100 credibility score with cross-referenced sources linked | No — it is not a fact-checker. Grammarly's plagiarism and citation tools check sourcing and originality, which is a different question from truth |
| Synthetic media / deepfake signals | Flags deepfake and AI-generated media signals in the video and audio itself | Text only — no audio or video analysis |
| Provenance tracking while you write | None — BSmeter has no writing surface | Grammarly Authorship tracks whether text was typed, pasted, or AI-generated as you write, and can produce a shareable report to demonstrate your process |
| Pricing | Free tier; Basic $3.99/mo; Premium $8.99/mo | The web AI Detector is free to use. A Pro plan adds deeper insight, including sentence-level highlighting of what triggered a flag |