Directory
Observability tools, A to Z
111 tools for metrics, logs, traces, profiling, OpenTelemetry, alerting, SLOs, and incident response. 64 are open source or have an open source edition. Listed alphabetically, never ranked, each with a link to its official site.
Missing a tool? Suggest it →A
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Alertmanager (opens the official site in a new tab)
Deduplicates, groups, routes, and silences alerts sent by Prometheus and compatible systems.
CNCF graduated (part of Prometheus)
prometheus.io/docs/alerting/latest/alertmanager
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Amazon CloudWatch (opens the official site in a new tab)
AWS's built-in service for metrics, logs, alarms, and dashboards across AWS resources and applications.
aws.amazon.com/cloudwatch
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Apache HertzBeat (opens the official site in a new tab)
Agentless real-time monitoring and alerting system with templates for many services.
Apache Software Foundation
hertzbeat.apache.org
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Apache SkyWalking (opens the official site in a new tab)
APM and observability platform for distributed systems, with tracing, metrics, and logs.
Apache Software Foundation
skywalking.apache.org
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Arize Phoenix (opens the official site in a new tab)
Tracing and evaluation for LLM applications, built on OpenTelemetry.
arize.com/phoenix
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Atlassian Statuspage (opens the official site in a new tab)
Hosted status pages for communicating incidents and maintenance to users.
atlassian.com/software/statuspage
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Axiom (opens the official site in a new tab)
Cloud platform for storing and querying events, logs, traces, and metrics.
axiom.co
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Azure Monitor (opens the official site in a new tab)
Microsoft Azure's monitoring service, including Application Insights and Log Analytics.
learn.microsoft.com/azure/azure-monitor
B
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Better Stack (opens the official site in a new tab)
Uptime monitoring, log management, on-call, and status pages in one service.
betterstack.com
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Blackbox exporter (opens the official site in a new tab)
Probes endpoints over HTTP, HTTPS, DNS, TCP, ICMP, and gRPC for Prometheus.
CNCF graduated (part of Prometheus)
github.com/prometheus/blackbox_exporter
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BugSnag (opens the official site in a new tab)
Error monitoring and stability tracking for web, mobile, and backend applications.
bugsnag.com
C
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cAdvisor (opens the official site in a new tab)
Collects resource usage and performance metrics from running containers.
github.com/google/cadvisor
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Checkly (opens the official site in a new tab)
Synthetic monitoring and API checks defined as code, with Playwright-based browser checks.
checklyhq.com
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Cilium Hubble (opens the official site in a new tab)
Network and service observability for Kubernetes, built on Cilium and eBPF.
CNCF graduated (part of Cilium)
github.com/cilium/hubble
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ClickStack (opens the official site in a new tab)
ClickHouse's observability stack: ClickHouse storage, the HyperDX UI, and an OpenTelemetry collector.
clickhouse.com/use-cases/observability
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Coralogix (opens the official site in a new tab)
Observability platform for logs, metrics, traces, and security data.
coralogix.com
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Coroot (opens the official site in a new tab)
Observability tool that uses eBPF to build service maps and metrics without code changes.
coroot.com
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Cortex (opens the official site in a new tab)
Horizontally scalable, multi-tenant long-term storage for Prometheus metrics.
CNCF incubating
cortexmetrics.io
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Cortex XCOR (formerly Chronosphere) (opens the official site in a new tab)
Palo Alto Networks' observability platform, formerly Chronosphere, focused on controlling metrics and telemetry volume.
paloaltonetworks.com/cortex/xcor
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Cribl (opens the official site in a new tab)
Telemetry pipeline for routing, reducing, and transforming logs, metrics, and traces.
cribl.io
D
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Dash0 (opens the official site in a new tab)
OpenTelemetry-native observability platform for traces, metrics, and logs, with Prometheus-compatible querying.
dash0.com
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Datadog (opens the official site in a new tab)
SaaS monitoring and observability platform covering infrastructure, APM, logs, RUM, and more.
datadoghq.com
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Dynatrace (opens the official site in a new tab)
Observability and application security platform with automatic discovery and AI-assisted analysis.
dynatrace.com
E
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Elastic Observability (opens the official site in a new tab)
Logs, metrics, APM, and synthetics built on Elasticsearch and Kibana. Core under AGPLv3, SSPL, or ELv2; observability apps under the Elastic License.
elastic.co/observability
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Embrace (now Cortex XCOR RUM) (opens the official site in a new tab)
Mobile and web real user monitoring. Acquired by Palo Alto Networks in 2026; now XCOR RUM, part of Cortex XCOR.
paloaltonetworks.com/cortex/xcor/real-user-monitoring
F
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Falco (opens the official site in a new tab)
Runtime security tool that detects unexpected behavior in hosts, containers, and Kubernetes.
CNCF graduated
falco.org
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Fluent Bit (opens the official site in a new tab)
Lightweight agent for collecting, processing, and forwarding logs, metrics, and traces.
CNCF graduated (part of Fluentd)
fluentbit.io
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Fluentd (opens the official site in a new tab)
Data collector that unifies log collection and routing to many destinations.
CNCF graduated
fluentd.org
G
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Gatus (opens the official site in a new tab)
Health dashboard that checks endpoints on a schedule and alerts on failures.
gatus.io
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Google Cloud Observability (opens the official site in a new tab)
Google Cloud's monitoring, logging, tracing, and profiling services.
cloud.google.com/products/observability
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Grafana (opens the official site in a new tab)
Dashboards and alerting over many data sources, from Prometheus to SQL databases.
grafana.com/oss/grafana
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Grafana Alloy (opens the official site in a new tab)
Grafana's distribution of the OpenTelemetry Collector, with Prometheus-native pipelines.
grafana.com/oss/alloy-opentelemetry-collector
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Grafana Faro (opens the official site in a new tab)
Web SDK for frontend observability: errors, performance, and user sessions.
grafana.com/oss/faro
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Grafana IRM (opens the official site in a new tab)
On-call management and incident response in Grafana Cloud.
grafana.com/products/cloud/irm
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Grafana Loki (opens the official site in a new tab)
Log aggregation system that indexes labels rather than full log text.
grafana.com/oss/loki
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Grafana Mimir (opens the official site in a new tab)
Horizontally scalable long-term storage for Prometheus and OpenTelemetry metrics.
grafana.com/oss/mimir
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Grafana Pyroscope (opens the official site in a new tab)
Continuous profiling database for finding CPU and memory hot spots in production.
grafana.com/oss/pyroscope
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Grafana Tempo (opens the official site in a new tab)
Distributed tracing backend that stores traces on object storage.
grafana.com/oss/tempo
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Graylog (opens the official site in a new tab)
Log management and SIEM platform.
graylog.org
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GreptimeDB (opens the official site in a new tab)
Database for metrics, logs, and traces, with SQL and PromQL.
greptime.com
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groundcover (opens the official site in a new tab)
Kubernetes observability platform built on eBPF, deployed in your own cloud.
groundcover.com
H
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Healthchecks.io (opens the official site in a new tab)
Monitors cron jobs and scheduled tasks by alerting when an expected ping does not arrive.
healthchecks.io
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Helicone (opens the official site in a new tab)
LLM observability: request logging, cost tracking, and analytics. Acquired by Mintlify in 2026 and in maintenance mode; check its status first.
helicone.ai
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Honeybadger (opens the official site in a new tab)
Error tracking, logs, lightweight APM, uptime monitoring, and status pages.
honeybadger.io
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Honeycomb (opens the official site in a new tab)
Observability platform built around high-cardinality events and distributed tracing.
honeycomb.io
I
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Icinga (opens the official site in a new tab)
Infrastructure monitoring and alerting system that grew out of Nagios.
icinga.com
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ilert (opens the official site in a new tab)
Alerting, on-call scheduling, and status pages.
ilert.com
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incident.io (opens the official site in a new tab)
Incident management with on-call, Slack-based response, and status pages.
incident.io
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InfluxDB (opens the official site in a new tab)
Time-series database for metrics and events.
influxdata.com
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Inspektor Gadget (opens the official site in a new tab)
eBPF-based tools for inspecting and debugging Kubernetes workloads and Linux hosts.
CNCF sandbox
inspektor-gadget.io
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Instana (opens the official site in a new tab)
IBM's automated application performance monitoring and observability product.
ibm.com/products/instana
J
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Jaeger (opens the official site in a new tab)
Distributed tracing platform for monitoring and troubleshooting microservices.
CNCF graduated
jaegertracing.io
K
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Kiali (opens the official site in a new tab)
Console for the Istio service mesh: topology, health, and traffic.
kiali.io
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Kibana (opens the official site in a new tab)
Elastic's UI for searching, visualizing, and analyzing data in Elasticsearch. Core under AGPLv3, SSPL, or ELv2; some features under the Elastic License.
elastic.co/kibana
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Komodor (opens the official site in a new tab)
Kubernetes troubleshooting, change tracking, and AI-assisted root-cause analysis.
komodor.com
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kube-state-metrics (opens the official site in a new tab)
Generates Prometheus metrics about the state of Kubernetes objects, such as pods and deployments.
CNCF graduated (part of Kubernetes)
github.com/kubernetes/kube-state-metrics
L
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Langfuse (opens the official site in a new tab)
LLM engineering platform: tracing, prompt management, and evaluations. Part of ClickHouse since 2026.
langfuse.com
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LangSmith (opens the official site in a new tab)
Tracing, evaluation, and monitoring for LLM applications, from LangChain.
langchain.com/langsmith/observability
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Last9 (opens the official site in a new tab)
Observability platform with a focus on high-cardinality metrics.
last9.io
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LogRocket (opens the official site in a new tab)
Session replay and frontend monitoring for web and mobile apps.
logrocket.com
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Logstash (opens the official site in a new tab)
Elastic's server-side pipeline for ingesting, transforming, and shipping data.
elastic.co/logstash
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Logz.io (opens the official site in a new tab)
Observability platform built on open source tools, with AI-assisted analysis.
logz.io
M
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Mezmo (opens the official site in a new tab)
SRE agent platform with a telemetry pipeline for logs, metrics, and traces.
mezmo.com
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Middleware (opens the official site in a new tab)
Full-stack cloud observability platform.
middleware.io
N
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Nagios (opens the official site in a new tab)
Long-standing infrastructure monitoring and alerting system, with the open source Nagios Core.
nagios.org
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Netdata (opens the official site in a new tab)
Per-second infrastructure monitoring. The agent is open source (GPL-3.0); the bundled dashboard UI is closed source.
netdata.cloud
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New Relic (opens the official site in a new tab)
SaaS observability platform covering APM, infrastructure, logs, and browser monitoring.
newrelic.com
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Nobl9 (opens the official site in a new tab)
SLO platform for defining, tracking, and alerting on service level objectives.
nobl9.com
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node_exporter (opens the official site in a new tab)
Prometheus exporter for hardware and operating system metrics on Unix-like hosts.
CNCF graduated (part of Prometheus)
github.com/prometheus/node_exporter
O
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Observe by Snowflake (opens the official site in a new tab)
Snowflake's observability product (formerly Observe Inc.), built on a telemetry lakehouse.
snowflake.com/en/product/observe
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Odigos (opens the official site in a new tab)
Automatic OpenTelemetry instrumentation for Kubernetes workloads, using eBPF. Its public open source repository is no longer available.
odigos.io
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OneUptime (opens the official site in a new tab)
Uptime monitoring, status pages, incident management, and observability in one project.
oneuptime.com
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OpenCost (opens the official site in a new tab)
Measures and allocates Kubernetes and cloud infrastructure costs.
CNCF incubating
opencost.io
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OpenLLMetry (opens the official site in a new tab)
OpenTelemetry-based instrumentation for LLM providers and frameworks, from Traceloop (acquired by ServiceNow in 2026).
github.com/traceloop/openllmetry
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OpenObserve (opens the official site in a new tab)
Observability platform for logs, metrics, and traces that stores data on object storage.
openobserve.ai
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OpenSearch (opens the official site in a new tab)
Search and analytics suite, forked from Elasticsearch, often used for logs and traces.
OpenSearch Software Foundation (Linux Foundation)
opensearch.org
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OpenSLO (opens the official site in a new tab)
Open specification for defining SLOs as code, independent of any vendor.
openslo.com
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OpenTelemetry (opens the official site in a new tab)
Vendor-neutral standard, SDKs, and APIs for generating and exporting traces, metrics, and logs.
CNCF graduated
opentelemetry.io
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OpenTelemetry Collector (opens the official site in a new tab)
Vendor-neutral agent and gateway that receives, processes, and exports telemetry.
CNCF graduated (part of OpenTelemetry)
opentelemetry.io/docs/collector
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OpenTelemetry eBPF Instrumentation (opens the official site in a new tab)
Zero-code instrumentation using eBPF (OBI), donated to OpenTelemetry from Grafana Beyla.
CNCF graduated (part of OpenTelemetry)
opentelemetry.io/docs/zero-code/obi
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Opik (opens the official site in a new tab)
Tracing and evaluation for LLM applications, from Comet.
comet.com/site/products/opik
P
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PagerDuty (opens the official site in a new tab)
On-call scheduling, alert routing, and incident response.
pagerduty.com
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Parca (opens the official site in a new tab)
Continuous profiling using eBPF, with storage and a query UI.
parca.dev
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Perses (opens the official site in a new tab)
Dashboards defined as code, with Prometheus support and a GitOps-friendly format.
CNCF sandbox
perses.dev
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Pinpoint (opens the official site in a new tab)
APM tool for large-scale distributed systems, with call stacks and service maps.
github.com/pinpoint-apm/pinpoint
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Pixie (opens the official site in a new tab)
Kubernetes observability using eBPF to capture telemetry without instrumentation.
CNCF sandbox
px.dev
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Prometheus (opens the official site in a new tab)
Metrics collection, time-series database, and PromQL query language, with alerting rules.
CNCF graduated
prometheus.io
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Pydantic Logfire (opens the official site in a new tab)
Observability platform built on OpenTelemetry, from the Pydantic team, with Python and LLM support.
pydantic.dev/logfire
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Pyrra (opens the official site in a new tab)
SLOs for Prometheus, with generated recording rules, burn-rate alerts, and a UI.
github.com/prometheus-community/pyrra
R
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Raygun (opens the official site in a new tab)
Crash reporting, real user monitoring, and APM.
raygun.com
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Robusta (opens the official site in a new tab)
Enriches and routes Kubernetes alerts, with automated troubleshooting.
home.robusta.dev
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Rollbar (opens the official site in a new tab)
Real-time error tracking and grouping for application code.
rollbar.com
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Rootly (opens the official site in a new tab)
Incident management and on-call, run from Slack.
rootly.com
S
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Sentry (opens the official site in a new tab)
Error tracking and performance monitoring for application code.
sentry.io
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SigNoz (opens the official site in a new tab)
OpenTelemetry-native observability platform for logs, metrics, and traces, built on ClickHouse.
signoz.io
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Site24x7 (opens the official site in a new tab)
Monitoring for websites, servers, applications, and cloud services, from Zoho.
site24x7.com
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Sloth (opens the official site in a new tab)
Generates Prometheus SLO recording rules and multi-window burn-rate alerts from a simple spec.
sloth.dev
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SolarWinds Observability (opens the official site in a new tab)
SolarWinds' observability service for applications, infrastructure, networks, and databases.
solarwinds.com/solarwinds-observability
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Splunk AppDynamics (opens the official site in a new tab)
Application performance monitoring product, formerly AppDynamics, now part of Splunk and Cisco.
splunk.com/en_us/products/splunk-appdynamics.html
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Splunk Enterprise and Splunk Cloud Platform (opens the official site in a new tab)
Splunk's platform for searching and analyzing machine data, logs, and events.
splunk.com/en_us/products/splunk-cloud-platform.html
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Splunk Observability Cloud (opens the official site in a new tab)
Splunk's observability suite for infrastructure, APM, RUM, and synthetics.
splunk.com/en_us/products/observability.html
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Sumo Logic (opens the official site in a new tab)
Cloud log analytics and security platform.
sumologic.com
T
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Telegraf (opens the official site in a new tab)
Plugin-driven agent for collecting and sending metrics and events.
influxdata.com/time-series-platform/telegraf
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Tetragon (opens the official site in a new tab)
eBPF-based security observability and runtime enforcement.
CNCF graduated (part of Cilium)
tetragon.io
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Thanos (opens the official site in a new tab)
Highly available Prometheus setup with long-term storage on object storage.
CNCF incubating
thanos.io
U
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Uptime Kuma (opens the official site in a new tab)
Self-hosted uptime monitoring with notifications and status pages.
uptime.kuma.pet
V
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Vector (opens the official site in a new tab)
Pipeline for collecting, transforming, and routing logs and metrics, maintained by Datadog.
vector.dev
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VictoriaLogs (opens the official site in a new tab)
Log database from VictoriaMetrics, designed for low resource use.
docs.victoriametrics.com/victorialogs
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VictoriaMetrics (opens the official site in a new tab)
Time-series database and monitoring solution, compatible with Prometheus.
victoriametrics.com
Z
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Zabbix (opens the official site in a new tab)
Monitoring for networks, servers, cloud services, and applications, with alerting and dashboards.
zabbix.com
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Zipkin (opens the official site in a new tab)
Distributed tracing system for collecting and looking up timing data.
zipkin.io
No tools match. Try a broader search, or suggest a tool.
How this list works
- Alphabetical, not ranked. Order says nothing about quality. Inclusion is not an endorsement, and no one pays to be listed.
- Factual descriptions. One sentence on what each tool does, linked to its official site. We avoid vendor claims and benchmarks.
- License labels. "Open source" means an OSI-approved license. "Open source + paid" means an open source project with a paid edition or cloud service from the same maintainer. "Source available" means public source under a non-OSI license. Licenses change, so check the project before you depend on it.
- Disclosure. o11yparadise's editor, Chaitanya Sistla, works at OpenObserve, which is listed here like every other tool. See our editorial standards.
- Missing a tool? Suggest it. Each suggestion becomes a proposed change that a human reviews before it is listed. Spotted an error? Tell us.
New to the space? Start with the open source observability guide, the OpenTelemetry primer, or check your team's habits with the Paradise Index.