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

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