Performance & Monitoring
ACTVT
Native macOS app for monitoring AI coding agent sessions alongside CPU, GPU, memory, and network metrics.
Artillery
Load testing, scalable Playwright E2E testing, and production monitoring toolkit for web applications and APIs.
Axiom
Agent-native observability platform for logs, metrics, traces, and events at petabyte scale.
Better Stack
Observability platform combining log management, infrastructure monitoring, error tracking, uptime monitoring, and incident management.
BoxWatch
Server monitoring tool for metrics, cron heartbeats, uptime checks, and process monitoring with an open-source agent.
Bundlephobia
Analyze the performance cost and size of npm packages before adding them to your bundle.
Compressor.io
An online image optimization tool for compressing JPEG, PNG, SVG, GIF, and WebP files to reduce file size while maintaining visual quality.
Core Web Vitals History
A visualization tool for tracking historical Core Web Vitals data over the last six months using the Google CrUX API.
Datadog
Cloud-scale monitoring, application performance monitoring, log management, and security platform for infrastructure and applications.
DebugBear
Website performance monitoring and page speed testing tool for Core Web Vitals, Lighthouse audits, and real-user metrics.
EzUptime
A comprehensive uptime and performance monitoring service for websites, servers, APIs, and domains with real-time alerting capabilities.
Grafana Labs
Full-stack observability platform for logs, metrics, traces, and agentic workflows using open standards like OpenTelemetry.
GTmetrix
A web performance testing and monitoring tool that analyzes page speed, identifies bottlenecks, and tracks Core Web Vitals over time.
IncidentHub
A status page aggregator that monitors third-party cloud and SaaS services in real-time to provide centralized outage alerts and health tracking.
Jaeger
Open source distributed tracing platform for monitoring and troubleshooting complex microservices-based distributed systems.
LaunchDarkly
Runtime control platform providing feature flags, progressive rollouts, automated rollbacks, and AI agent monitoring for production systems.
Lightest
A web performance tool for comparing website loading speeds side-by-side.
Lighthouse
Automated open-source tool for improving the quality of web pages with audits for performance, accessibility, SEO, and progressive web apps.
LogRocket
Session replay, error tracking, and product analytics platform for web and mobile applications.
MySQL Visual Explain
A visualization tool that translates cryptic MySQL EXPLAIN output into an understandable format to help identify query performance bottlenecks.
New Relic
Full-stack observability platform for application performance monitoring, infrastructure monitoring, logs, and AI-driven operations.
npm trends
Compare JavaScript package download counts over time across multiple NPM modules.
Odown
Uptime monitoring platform providing SSL checks, incident management, and customizable status pages with global monitoring locations.
OpenTelemetry
Open source observability framework providing APIs, libraries, agents, and collector services to capture distributed traces and metrics.
PageGuard
Website auditing tool for performance, accessibility, SEO, and best practices, providing AI-interpreted reports based on Google Lighthouse.
PageGym
Website speed testing, performance analysis, TTFB detection, render blocking identification, and layout shift diagnostics.
PageSpeed Insights
Analyze web page performance and core web vitals across desktop and mobile devices.
Pingdom Tools
Website speed test utility to analyze page load times, identify performance bottlenecks, and inspect HTTP requests.
Repohistory
Track GitHub repository traffic history beyond the standard 14-day limit with interactive charts, data export, and customizable star history widgets.
Sentry
Application monitoring and error tracking platform for identifying, diagnosing, and resolving software issues and performance bottlenecks in real time.
Servervana
Website performance diagnostics, uptime monitoring, and core web vitals tracking tool for developers and DevOps professionals.
SigNoz
Open-source APM and observability platform for logs, metrics, and traces, built on OpenTelemetry and ClickHouse.
sitespeed.io
Open source web performance tool providing HTML reports, Core Web Vitals, HAR waterfalls, and metrics for continuous monitoring.
Splitbee
Splitbee is a discontinued analytics and conversion platform that was acquired and sunset by Vercel.
SSR Checker
Tool to verify server-side rendering (SSR) vs client-side rendering by comparing HTML output with and without JavaScript enabled.
UltimateWebSpeed
Platform providing optimization strategies, hosting solutions, CDN configurations, and performance metrics analysis for website speed improvement.
UptimeRobot
UptimeRobot is a cloud-based uptime monitoring service that tracks websites, SSL certificates, ports, and cron jobs, sending instant alerts on failure.
Watch my SSL
Monitor SSL certificates across multiple domains and receive expiration alerts to prevent unexpected downtime.
WebPageTest
Test, compare, and optimize website speed, Core Web Vitals, and performance across real devices and global locations.
Zuzia
All-in-one server monitoring panel for freelancers and small agencies. Track uptime, SSL, ports, DNS, and server metrics without complex setups.