All testing tools

Synthetic checks correlated with APM traces, logs and infrastructure metrics.

Developer-first load testing: JavaScript scripts, Go engine, CI-native thresholds.

Google's built-in audit for performance, accessibility, SEO and best practices.

The API platform most developers already have open: requests, collections, tests, mocks.

Error tracking with stack traces, release attribution and now session replay.

YAML or JavaScript load tests that run serverless on AWS at large scale.

Managed cloud execution for JMeter, Gatling, k6 and Selenium scripts.

Monitoring as code: your Playwright scripts, running against production on a schedule.

Full-stack observability with automatic dependency mapping and AI root-cause analysis.

Session replay built for engineers: console, network, Redux state and stack traces.

Scripted browser and API monitors included in New Relic's usage-based platform.

Long-established uptime and transaction monitoring, now part of SolarWinds.

Open-source product analytics, replay, flags and experiments in one self-hostable platform.

Enterprise-grade device cloud with deep analytics and strong security posture.

Free uptime monitoring for 50 endpoints. The pragmatic starting point.

Uptime monitoring, incident management and status pages in one affordable product.

k6-powered checks inside Grafana Cloud, alongside your existing dashboards.

Enterprise performance testing with strong SAP, Citrix and Oracle support.

Open-source, self-hosted session replay — your user data never leaves your infrastructure.

The original enterprise load-testing suite. Fifty-plus protocols, decades of use.

Affordable uptime, page-speed, SSL and domain monitoring from many global locations.

Global device infrastructure focused on performance and real network conditions.