ChangeTower

ChangeTower is a cloud-based service that monitors websites for changes. Users give it a web address, say what counts as a change, and it alerts them when a matching change appears while keeping a dated record of the page.

What ChangeTower offers

• Change detection — compares screenshots, text and source code, and can focus on one part of a page.
• Custom alert rules — notifies on chosen keywords, phrases or code appearing or disappearing.
• Archiving — stores time-stamped snapshots, so the history of a page can be reviewed.
• Reporting — gives a notification feed and detailed change reports.
• Team features — shared workspace, roles, permissions and white-label reports for agencies.

Who it works with

Teams tracking regulatory and legal pages, competitors, product pages, and unauthorised changes to their own sites. It also lists government tender monitoring.

Key facts

• Check frequency: from every few minutes to weekly
• Security: SAML single sign-on and audit logs