No. 23 of 30 ·Alert Management Software

Riemann

Web · Linux

Visit site Alternatives

Freedom report

No signalScore 5.1

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely2 of 6 device platforms
DocumentedThinly documented

Riemann is ranked #23 of 30 in alert management software on Freedom251. It runs on Linux, Web.

Compared on alert management software

Alert deduplication: Yes
Routing rules: Yes
Alert enrichment: Yes

Best Riemann alternatives

See all 20

Two bars Grafana Cloud Application Observability Free tier No. 1$0.03/mo6.7 Two bars Wazuh Free tier No. 2$571/mo6.7 Two bars PagerDuty Free tier No. 3$233.33/mo6.6 Two bars Prometheus Free tier No. 4Free6.6 Two bars TrueWatch Log Management Free tier No. 5$0.11/mo6.6 Two bars AlertOps Free tier No. 6$8/mo6.5

The record

Purpose: Riemann monitors distributed systems by aggregating events from servers and applications and processing event streams.
Stream processing: Its configurable streams can filter, combine, alter, and act on events, and the configuration is written in Clojure.
Monitoring: Events can report application exceptions and request latency as well as host CPU, memory, and disk state.
Dashboards: The dashboard displays queried system state and can show matching events in real time over websockets.
Alerts: Riemann supports email alerts and can integrate with PagerDuty for SMS or phone alerts.
Integrations: The site describes forwarding event streams to Graphite and includes a Librato Metrics integration.
Protocols: Riemann accepts Protocol Buffers over TCP and UDP; its documented servers also include TLS and websockets.
Deployment: The quickstart describes tarball, Debian and RPM package, Puppet, Vagrant, and Chef installation; the how-to also documents Docker.
Performance: The site says a stock configuration on commodity x86 hardware can handle millions of events per second at sub-millisecond latency, with 99th-percentile latency around 5 ms.
Operational limit: The site notes that UDP is lossy and recommends TCP for reliable delivery and acknowledgement.
Support: The support page directs users to IRC, the mailing list, or GitHub Issues for help.
Intended users: The site describes Riemann as intended for operations staff managing large, dynamic infrastructure and engineers investigating production errors and performance bottlenecks.

Where it ranks on Freedom251

Best Alert Management Software in 2026#23 of 30

Is Riemann yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote Riemann

Sources

riemann.io· checked 4 Oct 2026
riemann.io/concepts.html· checked 4 Oct 2026
riemann.io/howto.html· checked 4 Oct 2026
riemann.io/quickstart.html· checked 4 Oct 2026
riemann.io/support.html· checked 4 Oct 2026