Site Spy
Tracks any webpage for changes and alerts you the moment something meaningful updates — price drops, new listings, restocked items.
🔗 Visit Site Spy
Description
Checking a webpage every day to see if a price dropped, a product came back in stock, or a job listing appeared is tedious and easy to forget. Site Spy does that checking for you: point it at any page, tell it in plain English what you care about (like "price drops" or "new listings"), and it watches the page around the clock, only pinging you when something you'd actually care about changes.
Built by solo developer Vitaly Kuprin, Site Spy takes periodic snapshots of tracked pages and uses an AI-powered filter to interpret natural-language rules, screening out noise like rotating ads, timestamps, or view counters that would otherwise trigger false alerts. It supports element-level tracking via a visual inspector, side-by-side visual diffs highlighting additions in green and removals in red, and delivers notifications through email, Telegram, push, or webhooks. Browser extensions for Chrome and Firefox, an MCP integration for AI agents like Claude and Cursor, and RSS change feeds round out the distribution options. Pricing is freemium: free for 2 sites, up to Business at €99/month for 500.
💬 Our review
The short version: if you're manually refreshing a page hoping for a restock, price drop, or new listing, Site Spy replaces that habit with an alert — the AI filtering is what separates it from a bare page-diff tool that would otherwise flood you with false positives from rotating ads or timestamps.
Compared to generic "page monitor" browser extensions (Distill, Visualping), Site Spy's natural-language filter and element-level tracking are the differentiators — you can say "tell me about price drops" instead of hand-picking a CSS selector to watch. The free tier's 2-site cap is stingy for anyone tracking more than a couple of things, and at €8-99/month for meaningful volume it's priced like a proper SaaS tool rather than a hobby utility, so it's best justified if the thing you're watching (a restock, a competitor's pricing page, a rental listing) has real money or time attached to it. Solo-developer products carry the usual continuity risk, but the MCP integration for AI agents is a genuinely forward-looking touch most competitors in this space don't have yet.
💰 Pricing
📊 Global score
🤖 AI-enriched data
Gratuit (2 sites) · Starter 4€/mois (25 sites) · Pro 8€/mois (100 sites) · Business 99€/mois (500 sites)
Pros
Filtre IA en langage naturel (pas de règles techniques à configurer)
Suivi au niveau d'un élément précis de la page
Diff visuel clair (vert/rouge)
Notifications multi-canal (email, Telegram, webhook)
Cons
Palier gratuit limité à 2 sites seulement
Prix qui grimpe vite pour un usage volumineux
Produit solo-developer, risque de continuité