In simple English
Some websites do not have feeds to tell you when they change. You have to visit them manually to see if anything is new. Klaxon visits those pages for you every ten minutes. If it finds a change, it sends an email to you or your team. You can also send alerts to a Slack or Discord channel.
What it is
An open-source website change-monitoring tool built by journalists at The Marshall Project. It runs on a cloud server and checks saved pages on a schedule.
What it is good for
Journalists, researchers and solo builders who need to track specific public records, legal filings or competitor websites without checking them by hand every day.
- Saves hours of manual page-checking.
- Sends instant email or chat alerts on changes.
- Easy one-click deployment to hosting providers.
- Requires a paid hosting account since free tiers ended.
- Requires manual setup of an email delivery service.
- Original creators no longer support individual users.
Checking pages by hand every day
Slack
- dgtlmoon/changedetection.io35k stars
A popular alternative website change detection tool with robust notification options.
- huginn/huginn50k stars
A more complex automation system that can also monitor websites and send alerts.
- cybertec-postgresql/pg_timetable1.4k stars
A job scheduler for PostgreSQL whose jobs and schedules live in the database itself.
- PrefectHQ/prefect24k stars
Adds scheduling, retries and a run history to Python functions you already have.
Click the Deploy to Heroku button in the project repository to set up your own instance on the cloud.