| Per-claim credibility scoring | Extracts every verifiable claim and scores each 0-100 against live web sources, with evidence linked per claim | Conversational answers and summaries about a page; no structured per-claim scoring or evidence trail |
| Audio-only and uncaptioned video | Transcribes the audio itself — podcasts, TikTok, Instagram Reels, and clips with no captions available | YouTube summarization works from the video's existing transcript/captions; it isn't a standalone transcription tool |
| Deepfake / AI-generated media signals | Flags deepfake and AI-generation signals alongside the claim analysis | Not a feature — Leo reads text and understands images, but doesn't authenticate or forensically check media |
| Where it runs | Any browser via the web app (paste a link), plus Chrome and Firefox extensions for watching live | Brave browser only — but available across desktop (macOS, Windows, Linux) and mobile (Android, iOS) |
| Privacy model | Cloud service; analyses are tied to your account | Stronger here: no account required for the free tier, conversations aren't retained or used for training, and requests are reverse-proxied so Brave can't link them to your IP |
| Breadth of tasks | Fact-checking video and audio only — no writing, translation, or coding help | Much broader: summarizes pages, PDFs and Google Docs, generates content, translates, assists with code, supports Bring Your Own Model, and has agentic browsing in early access |