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Obseras
Know the moment any web page, price or policy changes
Obseras watches web pages, prices, PDFs, APIs, feeds and GitHub repos and emails you the exact diff when something changes — with a plain-English summary of what changed. A visual picker lets you watch just one element (like a price) without touching CSS. Plus a free public tracker of the big platforms' terms & privacy changes. No install, real free plan.
Hi, I built Obseras because I kept manually re-checking pages to see if something changed — a product's price, a service's terms, a PDF price list, a competitor's page.
You point it at a URL (web page, price, PDF, API/JSON, RSS, or a GitHub repo), and it emails you the exact before/after diff when something changes — with a one-line plain-English summary of what changed. There's a visual picker so you don't need to know CSS to watch just one element (e.g. the price).
Two things that turned out more interesting than I expected:
A "double signal" for terms/policy pages: it tracks the page's own stated "last updated" date separately from the body, so it can flag when wording changed without the date being bumped — the quiet edits.
A public change tracker of the big platforms' terms/privacy pages (obseras.com/changes) — free to browse, with per-platform pages and an RSS feed.
Stack: .NET 10 / Blazor Server, SQLite, plugin-based watchers, Playwright for JS-heavy pages, on a single small VPS behind Cloudflare. AI summaries via a cheap model, only on the rare event that something actually changes.
Free plan is real (no card). It's early and solo-built — I'd genuinely value feedback on the diff quality and on what you'd want to watch that it can't yet.
Link: https://obseras.com — public tracker: https://obseras.com/changes
About Obseras on Product Hunt
“Know the moment any web page, price or policy changes”
Obseras was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #116 on the daily leaderboard. Obseras watches web pages, prices, PDFs, APIs, feeds and GitHub repos and emails you the exact diff when something changes — with a plain-English summary of what changed. A visual picker lets you watch just one element (like a price) without touching CSS. Plus a free public tracker of the big platforms' terms & privacy changes. No install, real free plan.
On the analytics side, Obseras competes within Productivity, API and User Experience — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how Obseras performed against the three products that launched closest to it on the same day.
Who hunted Obseras?
Obseras was hunted by Svetlin Minkov. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Obseras including community comment highlights and product details, visit the product overview.
Svetlin Minkov