Prometheus replaces 2 paid apps

One open-source tool, 2 subscriptions it can stand in for. Each pairing below is curated and verified by hand, with the honest catch spelled out. No votes, no pay-to-list.

Prometheus $0→replaces $15/mo★ 66k · active sep 2026docker to self-host📟 monitoring

prometheus.io ↗repo ↗Prometheus in the catalog →

the facts, verified

licenseApache-2.0

runsyour server

setupnot verified by us yet — check the repo README

facts verified 2026-09-13

what it lets you cancel

DatadogYES$15/mo

Pull-based metrics collection and alerting that powers monitoring at half the internet.

the verdict →all Datadog alternatives →

Grafana CloudYESusage-based

Pull-based metrics collection and alerting that powers monitoring at half the internet.

the verdict →all Grafana Cloud alternatives →

last updated 2026-09-13 · up to $180/yr replaced · no votes, no pay-to-list

Every verdict page above lists what you lose when you switch, so you can decide with open eyes.all open-source alternatives →