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Blackbox Exporter vs Heartbeat: catalog facts
Blackbox Exporter	Heartbeat
Free Free and open source, part of the Prometheus project.	Free Free and open source under the Apache-2.0 license.
Linux, Self-hosted	Command line
Probes over several protocols including ICMP and gRPC Official Prometheus project with regular maintenance	Checks services over HTTP, TCP, and ICMP Supports TLS, authentication, and proxies
Needs Prometheus to collect and store results No interface of its own beyond a basic status page	Sends monitoring data to Elasticsearch or Logstash for analysis
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 8, 2026

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