Zabbix
100 · HealthyEnterprise monitoring for networks, servers, VMs and applications, with templates, triggers and escalations.
Open source Monitoring & error tracking
Prometheus
97 · HealthyMetrics collection and time series database with its own query language (PromQL) and alerting rules.
OpenObserve
94 · HealthyObservability platform for logs, metrics, traces and real user monitoring, built for low storage costs.
SigNoz
92 · HealthyOpenTelemetry-native observability with logs, metrics and traces in one app.
Keep
92 · HealthyAlert management that pulls in alerts from your monitoring tools, deduplicates and correlates them, and runs workflows.
HyperDX
91 · HealthyObservability on ClickHouse that links session replays, logs, metrics, traces and errors in one search.
Grafana
90 · HealthyDashboards and alerting over metrics, logs and traces from Prometheus, Loki, SQL databases and many other sources.
Loki
90 · HealthyLog aggregation that indexes labels rather than full text to keep storage cheap, queried from Grafana.
openstatus
88 · HealthyStatus pages and uptime monitoring from several regions, with incident updates and alerting.
Gatus
87 · HealthyHealth checks for HTTP, TCP, DNS and more, configured in YAML, with alerts and a status page.
Netdata
86 · HealthyPer-second infrastructure monitoring agent with auto-discovered metrics, dashboards and anomaly detection.
Uptime Kuma
83 · HealthyUptime monitor for HTTP, TCP, DNS and more, with status pages and many notification channels.
Apache SkyWalking
78 · StableApplication performance monitoring with distributed tracing, service maps and metrics for microservices.
OneUptime
72 · StableAll-in-one platform for uptime checks, status pages, on-call, incidents, logs and APM.
Checkmate
70 · StableUptime, response time and server hardware monitoring, with incidents and status pages.
Healthchecks
69 · StableCron job and background task monitoring that alerts you when expected pings stop arriving.
Kener
69 · StableStatus page with built-in monitors, incident history and a polished public page.
LogTide
66 · StableLog management with search, alerts and dashboards, designed to be light to run and privacy-friendly.
Coroot
65 · StableeBPF-based observability that collects metrics, logs, traces and profiles without code changes and suggests root causes.
Uptrace
65 · StableOpenTelemetry APM for traces, metrics and logs, stored in ClickHouse.
Source-available and unverified licenses
The code for these is public, but the license is not an OSI open source license, or we have not verified it yet. Check the license notes on each project before relying on it.
Sentry (self-hosted)
99 · HealthyError tracking and performance monitoring; the same code as Sentry's hosted service.
Bugsink
64 · StableError tracking that accepts events from Sentry SDKs and runs on a single small server.
Cachet
60 · StableStatus page system for publishing component status, incidents and scheduled maintenance.
Sentry (self-hosted)
Error tracking and performance monitoring; the same code as Sentry's hosted service.
Will it still be around?
Healthy
Score 99/100
Can a business use it freely?
Free, no reselling
Functional Source License 1.1 · source-available, not open source · relicensed stricter in 2023
Features compared
has,doesn't3 features1 feature
5/9 Datadog features free in Sentry (self-hosted)
✕ doesn't have it · ◐ partly · $ higher plan or paid editionBoth have 4
Headline Datadog features on the Infrastructure Pro + APM plan, and whether Sentry (self-hosted) has each in its free, self-hosted edition.
| Feature | DatadogInfrastructure Pro + APM plan | Sentry (self-hosted)5 of 9 free |
|---|---|---|
| Datadog has, Sentry (self-hosted) doesn't3 | ||
| Infrastructure metrics | Included | No |
| Incident management and on-call | Higher planPriced separately | No |
| OpenTelemetry support | Included | Partly |
| Sentry (self-hosted) has, Datadog doesn't1 | ||
| Real user monitoring and session replay | Higher planPriced separately | YesSession replay and web vitals |
| Both have4 | ||
| Dashboards | Included | Yes |
| Alerts and monitors | Included | Yes |
| APM and distributed tracing | Included | YesPerformance tracing |
| Error tracking | IncludedWith APM | Yes |
| Neither has fully1 | ||
| Uptime and synthetic checks | Higher planPriced separately | PartlyUptime monitoring |
Sources
- Datadog, checked 2026-10-09: datadoghq.com, datadoghq.com
- Sentry (self-hosted), checked 2026-10-09: develop.sentry.dev, docs.sentry.io
Flat Rate Deploy
A 25-host team on Datadog Infrastructure Pro + APM pays about $1,150 a month. Sentry (self-hosted) on OpenTools costs $99 a month, setup included, so you save $1,051 a month, about $37,836 over three years.
Monthly cost
- Sentry (self-hosted) on OpenTools
- $99
- Datadog
$1,150
You save each month
$1,051/mo
91% less than today
Saving from month one
You save
- Over 3 years
- $37,836
- In year one
- $12,612
List price checked 7 Oct 2026 · Source · Disclaimer
Health score: 99/100
Healthy · activity, bus factor and issue responsiveness, from GitHub
Score v2 · How it works
Activity
45% weight100/100
- Last commit yesterday (100/100).
- 19437 commits in the past 12 months (100/100).
- 23 releases in the past 12 months (100/100).
Bus factor
30% weight100/100
- Top contributor wrote 11% of the last 90 commits (past 12 months).
- 32 people authored those commits.
Responsiveness
25% weight96/100
- 90% of all issues are closed (1749 open, 15642 closed) (100/100).
- 28 of 30 recent issues got a reply or were closed (93/100).
License
Free, no reselling
Functional Source License 1.1 · Source-available, not open sourceRelicensed 2023
What you need to do
Free to self-host and use in your business, changes included. You may not sell it or offer it to others as a hosted service that competes with the vendor.
For Sentry (self-hosted)
Any use except a competing commercial product or service. Each version becomes Apache-2.0 two years after release.
Functional Source License 1.1 (Apache-2.0 future license) · Source-available, not open source. The code is public, but the license restricts how you can use it, usually by banning competing hosted services or capping production use. Not open source.
License text checked 2026-10-07 · Read it
License history
- BUSL-1.1 → FSL-1.0-Apache-2.0 · commit
GitHub activity
- Stars
- 46k
- Forks
- 4.9k
- Commits, 12 mo
- 19k
- last yesterday
- Releases, 12 mo
- 23
- last 3 days ago
- Contributors
- 355
- 32 in last 90 commits
- Open issues
- 1.7k
- 16k closed
Snapshot from 2026-10-08 · Funding: custom, custom
Top contributors
Points for pull requests merged into Sentry (self-hosted) and reviews of them since 10 October 2025. Building something another user asked for earns more. 300 people have points on Sentry (self-hosted) in all.
