Open source JavaScript library, maintained by Akamai, that measures page load and user-perceived performance in real browsers and beacons the timings to a server you choose.
Pricing and hosting
- Pricing
- Free
- Open source
- Yes (BSD-3-Clause)
- Self-hosted
- Yes
- Launched
- 2010
- Status
- Active
- Website
- akamai.github.io
Plans and prices change; check the tool's own site before you decide.
What it does
Real user monitoring and session replay checklist
3 of 9 confirmed in Boomerang's own documentation. The same checklist is used for every tool in RUM and replay.
- Core Web Vitals Yes
- Session replay No
- JavaScript errors Yes
- Mobile SDKs No
- Resource timing No
- Segmentation No
- Alerts No
- Privacy masking Yes
- Journeys or funnels No
Collection library only: beacons data to your own endpoint, no UI, storage, breakdowns or alerting (mPulse is the Akamai backend). Collects ResourceTiming data but does not display waterfalls. Privacy via strip_query_string.
Checked against: github.com, akamai.github.io, akamai.github.io (2), akamai.github.io (3), akamai.github.io (4), akamai.github.io (5)
Alternatives to Boomerang
Other real user monitoring and session replay tools. See all 28.
-
Akamai mPulse Akamai real user monitoring that measures page and app performance from real visitors and links it to business metrics such as conversions and bounce rate. -
Atatus Full-stack observability SaaS with APM, real user monitoring, logs, infrastructure and synthetic monitoring, priced without per-user fees. -
Blue Triangle Real user and synthetic monitoring for e-commerce sites that ties page speed, errors and third-party tags to lost revenue and conversions.
-
Calibre Web performance monitoring with real user monitoring, scheduled synthetic page speed tests and Chrome UX Report data, plus budgets and alerts.
-
Catchpoint Enterprise internet performance monitoring: synthetic tests run from backbone, cloud and ISP nodes worldwide, alongside real user and BGP monitoring. -
Cloudflare Web Analytics Privacy-first, cookie-free site analytics from Cloudflare that also reports real-user Core Web Vitals per page; works on sites not proxied by Cloudflare too. -
Contentsquare Digital experience analytics platform with session replay, heatmaps, journey analysis and error and speed analysis; Hotjar is now part of it. -
CoreDash Real user monitoring for Core Web Vitals with element-level attribution, CrUX cross-checks, alerts and an MCP server so coding agents can read the data. -
DebugBear Website performance monitoring that combines real user Core Web Vitals data, scheduled Lighthouse lab tests and Google CrUX data, with alerts on regressions. -
Embrace Mobile and web app monitoring built on OpenTelemetry: crashes, ANRs, network calls and full user session timelines for iOS, Android, React Native and Unity. -
Fullstory Digital experience analytics built on session replay: records web and mobile sessions, flags frustration signals and errors, and lets you search and segment users by behaviour.
-
Glassbox Enterprise session replay and digital experience analytics for web and mobile apps, with struggle detection and data retention aimed at regulated industries.