Competitor pricing. Product pages. Government filings. API changelogs. Get instant alerts when something changes — with AI analysis of what it means.
No signup required. 2 free checks per day.
Most monitoring tools tell you something changed. The Witness tells you what it means.
Other tools compare screenshots. The Witness reads actual content — pricing tables, policy text, product listings — and tells you what shifted and by how much.
Full-page screenshots archived with every check. Before and after, timestamped. When someone says "nothing changed," you'll have the receipts.
Every change is scored by significance. A footer copyright update won't ping you. A competitor dropping prices 20% will — instantly, wherever you want.
Cookie banners, login walls, scroll-to-content — interact with a live preview once, and every check replays your actions automatically.
Real sites that change frequently. Pick one and start your first monitor for free.
Paste any URL — a competitor's pricing page, a product listing, a government filing. We'll start watching in seconds.
Automated checks run every hour. AI filters out noise like ads and timestamps, so you only hear about changes that matter.
Get a plain-language briefing on Slack, Email, Telegram, or Discord — what changed, why it matters, and what you should do.
No credit card required. Upgrade when you need faster checks and unlimited analysis.
3 monitors, daily checks, email alerts. Free forever.
For professionals who need to know the moment something shifts.
For teams monitoring at scale.
Every hour without monitoring is a missed change, a lost opportunity. Start free in 30 seconds.