Grafana Mimir vs updown.io

updown ships infrequently but substantively, maintained by a single developer. The past year added Pulse monitoring for inbound heartbeats, body string matching for those pulses, two probe-location changes, and a ten-year history chart on status pages. The newest release adds closed-port monitoring, so a check can assert that a TCP port is unreachable — firewall verification rather than an availability test.

The arc is widening what a single check can assert rather than expanding elsewhere in the product. Pulse brought inbound heartbeats alongside outbound polling, string matching let a pulse fail on its content instead of only its absence, and closed-port checks invert the assertion entirely. Probe-network work runs in parallel — Toronto replaced the retired Montreal node for IPv6, Cape Town came online in 2025 — and every release carries a tail of small fixes rather than a second headline feature.

The next release most likely extends conditions on the existing check types again rather than introducing a new monitoring modality, given that each of the last three headline features reused the same probe machinery. The recurring maintenance tail points to continued consolidation around alerting, recipients, and API access.