Guides
The best website change monitoring tools in 2026
An honest comparison of nine page-monitoring tools — Visualping, Distill, changedetection.io, and more — organized by the question that actually matters: what happens when the page changes?
Last Modified
Product updates, monitoring guides, and how modsignal decides what counts as a change.
Engineering
Exact diff, semantic, or browser agent: choosing a check tier
modsignal's three check tiers trade cost for judgment. How each one works, what each one catches, and a simple rule for picking the right tier per page.
Guides
How to monitor your vendors' subprocessor lists (before the objection window closes)
Vendors change subprocessor lists quietly, and their notification mechanisms are opt-in at best. A practical guide to watching subprocessor pages, DPAs, and trust centers — with GDPR Article 28 mechanics explained.
Guides
How to monitor a competitor's pricing page without drowning in noise
Pricing pages change quietly and often. A practical setup for catching the changes that matter — plan drops, limit changes, trial cuts — and ignoring the rest.
Product updates
Introducing modsignal
Describe what you care about in plain language. modsignal checks the page and alerts you only when it truly changes, with evidence attached.