sitespeed.io
sitespeed.io: A self-hosted option for scripted browser tests, CI budgets, and detailed diagnostics. Ranked #20 of 34 in Core Web Vitals Monitoring Tools by our editors (6.9/10); pricing: Free plan; best for developers needing open-source CI performance tests.
At a glance
- Editor score6.9 / 10
- PricingFree plan
- Best forDevelopers needing open-source CI performance tests
- Free planYes
- Paid fromFree
- Real-user monitoringNo
- Facts checked14 Nov 2026
Where it wins
- Tests real browsers and reports LCP, INP, CLS, video, and HAR waterfalls
- Performance budgets can fail CI builds when limits are exceeded
- Exports metrics to Graphite or InfluxDB for Grafana dashboards
Where it doesn't
- No real-user monitoring through an installed visitor-data agent
- Teams provide their own compute and results storage
- Self-hosting and CI automation require teams to manage their environment
Our verdict on sitespeed.io
sitespeed.io is an open-source website performance testing tool for developers and teams that want synthetic browser checks in their development workflow. It runs on Linux, macOS, and Windows, and tests with real browsers including Chrome, Firefox, Edge, and Safari. Its reports cover Core Web Vitals such as LCP, INP, and CLS, alongside visual metrics, video recordings, HAR waterfalls, CPU activity, and long tasks. That combination makes it a fit for teams investigating page performance and preventing regressions before release.
CI integration and diagnostics are central to the product. Teams can run tests from a terminal, script user journeys, test multiple URLs, and set performance budgets that fail builds when limits are exceeded. Integrations include Jenkins, CircleCI, GitLab CI, and GitHub Actions. For analysis beyond the test run, metrics can be exported to Graphite or InfluxDB and visualized in Grafana; PagerDuty and Slack are also listed among its integrations. The tool can retrieve Chrome User Experience Report data, but its monitoring approach is synthetic rather than an installed agent collecting visitor data. Choose it when repeatable real-browser checks and build gates matter more than direct real-user monitoring.
The software itself is free, with no paid plan tier described. The tradeoff is operational: deployment is self-hosted, so teams provide the compute and storage for test results and maintain the environment that runs scheduled checks. Documentation and community support are the listed support channels. This model suits developers who can own that infrastructure and want control over their testing workflow; teams seeking hosted monitoring or RUM should consider a different kind of tool. Its range of diagnostics and CI budget checks is useful, but it is not a replacement for visitor-level monitoring.
Your product? Our editors can test sitespeed.io in depth and publish a review, labelled as paid · from $149/mo →
sitespeed.io pricing
sitespeed.io fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Real-user monitoring | No |
| Synthetic monitoring | Yes |
| CI budget checks | Yes |
| Alert channels | Slack |
| Data retention | Not verified |
| Synthetic test locations | Not verified |
| Deployment | Self-hosted |
| Platforms | Linux, macOS, Windows |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 9 integrations: Graphite, InfluxDB, Grafana, Jenkins, CircleCI, GitLab CI … |
| Pricing | Free plan |
| Website | sitespeed.io |
| Facts checked | 14 Nov 2026 |
sitespeed.io integrations
sitespeed.io lists 9 integrations on its own site.
- Graphite
- InfluxDB
- Grafana
- Jenkins
- CircleCI
- GitLab CI
- GitHub Actions
- PagerDuty
- Slack
Alternatives to sitespeed.io
- Sentry Web VitalsProduction browser metrics connect web vitals to trace and code-level debugging.9.3
- GTmetrixGTmetrix pairs real Chrome tests and Web Vitals reports with scheduled monitoring.9.1
- WebPageTestA flexible page-testing toolkit, not a continuous Core Web Vitals monitor.9.0
See all sitespeed.io alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
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