obseras
Log in Start free →
Free while we build it · no credit card

Watch everything.
Know what changed.

Obseras monitors websites, PDFs, APIs, feeds and repos — and emails you the exact diff when something changes. Nothing to install.

Start free → See a live example
Live — watching 18 platforms' terms right now See all →
Latest detected change · Jul 24
Amazon — Conditions of Use
Unable to determine what changed. The before and after content appears identical and consists of corrupted or improperly encoded text that cannot be read.
See the exact before/after →
What it watches

One inbox for every change

Websites
Any public page — pricing, docs, terms, job posts. Watch the whole page or one element.
competitor.com/pricing
PDFs
Contracts, price lists, specs. We diff the extracted text between versions.
rates-2026.pdf
APIs
JSON endpoints. Watch the whole response or a single JSON path.
api.example.com/v2/status
RSS feeds
New items in any feed — releases, blogs, filings.
blog.example.com/feed
GitHub repos
Releases, tags, or file changes in public repositories.
github.com/org/repo
Files
Any file by URL — CSVs, changelogs, robots.txt.
example.com/prices.csv
How it works

Simple by design

01
Paste what to watch
A URL, a PDF, an API endpoint, an RSS feed. Paste it in — nothing to install.
02
Set a schedule
Every 15 minutes, hourly, daily, weekly. You decide how closely we look.
03
Get the diff by email
When something changes, one email with the exact old and new values. Nothing else.
The email

The exact diff, in your inbox

No dashboards to check. When a watch fires, you get one email: what changed, old value, new value, when. That's it.

✓ Only emails when something actually changed
✓ Ignores noise — timestamps, ads, rotating content
✓ Full change history kept for every watch
From Obseras · to you
Change on competitor.com/pricing
2026-07-02 14:03 UTC
Pro — € 49 per month, billed yearly Pro — € 59 per month, billed yearly
View history Pause watch
Pricing

Start free, grow when you need to

Free
€ 0
✓ 3 website watches
✓ Daily checks
✓ Email notifications
Start free →
Popular
Pro
€ 1.99 / mo
✓ 20 watches, every type
✓ Checks down to every minute
✓ Email + Telegram notifications
Get Pro → or € 19 / year — save 20% ☕ or just buy us a coffee — € 3
Business
€ 9.99 / mo
✓ Unlimited watches, every type
✓ Everything in Pro
✓ Up to 5 extra emails & Telegram accounts
Get Business → or € 99 / year — save 17%
Join free →
Free during beta · No credit card

Questions

Do I need to install anything?
No. Obseras runs in the cloud — paste a URL and it starts watching.
How often does it check?
You pick: every 15 minutes, hourly, daily, or weekly, per watch.
Will it email me about every tiny change?
No. We ignore noise like timestamps, ads and rotating content, and you can watch just one element or value.
What happens after beta?
Pro is € 1.99 / month and Business € 9.99 / month. Beta users keep a discount, and we will email you well before anything changes.