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HetrixTools vs Blackbox Exporter: catalog facts
HetrixTools	Blackbox Exporter
Freemium Free tier with 15 uptime and 32 blacklist monitors; paid plans add more.	Free Free and open source, part of the Prometheus project.
Web	Linux, Self-hosted
Generous free tier for uptime and blacklist monitoring Checks from up to 12 locations	Probes over several protocols including ICMP and gRPC Official Prometheus project with regular maintenance
Hosted only, with no self-hosted option Requires an account	Needs Prometheus to collect and store results No interface of its own beyond a basic status page
Web application, Hosted service	Downloadable app, Self-hosted
Closed source	Open source
License not stated	License not stated
Account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.