How to Monitor My Web App for Free
You can build a complete monitoring stack for free: UptimeRobot for uptime (50 monitors, 5-min checks), Sentry for error tracking (5,000 errors/month), PostHog for analytics (1M events/month), and Vercel/Netlify built-in logs for deployment monitoring. This covers uptime, errors, user analytics, and deployment health — all at zero cost.
Why this matters
Most builders skip monitoring because they assume it costs money. It does not. The free tiers of modern monitoring tools are generous enough for any early-stage app. The real cost of not monitoring is not financial — it is lost users, undetected bugs, and the anxiety of not knowing what is happening with your app.
What's at stake
A monitored app improves over time because you see what is broken and fix it. An unmonitored app degrades over time because problems accumulate invisibly. Free monitoring tools eliminate the last excuse for flying blind.
Your checklist.
Uptime monitoring with UptimeRobot
CriticalFree plan includes 50 monitors, 5-minute check intervals, email/Slack/Discord alerts, and a public status page. Monitors HTTP(s), ping, port, and keyword checks. Set up in under 5 minutes.
Error tracking with Sentry
CriticalFree plan includes 5,000 errors/month, performance monitoring, session replay on error, and email alerts. Supports React, Next.js, Vue, Node.js, Python, and more. Install the SDK and initialize with your DSN.
Analytics with PostHog or Vercel Analytics
ImportantPostHog free tier: 1M events/month, product analytics, session replay, feature flags. Vercel Analytics: included with Vercel deployments, basic web vitals and page views. Either gives you user insights at zero cost.
Log monitoring with hosting provider
ImportantVercel, Netlify, and Replit all provide built-in function and deployment logs. Check these when debugging issues. For more advanced logging, Better Stack offers a free tier with 1GB/month of log storage.
Performance monitoring with web vitals
RecommendedUse Chrome DevTools Lighthouse or PageSpeed Insights to check your Core Web Vitals. Sentry and Vercel Analytics also track performance metrics automatically. Aim for LCP under 2.5 seconds and CLS under 0.1.
Monitor everything about your app without spending a dollar
- Free monitoring dashboard covering uptime, errors, and user activity
- Alert notifications when something needs your attention
- Performance tracking to ensure your app stays fast
Frequently asked questions.
Yes. UptimeRobot monitors over 2 million websites and has been operating since 2010. Sentry powers error tracking for thousands of companies. PostHog is used by 90,000+ teams. These are production-grade tools with generous free tiers, not toy products.
Upgrade when you consistently hit free tier limits: more than 5,000 errors/month in Sentry, need faster than 5-minute uptime checks, or want advanced features like on-call rotation or incident management. Most builders will not need paid monitoring until they have significant traffic.
About 30 minutes total. UptimeRobot takes 5 minutes (just add your URL). Sentry takes 10-15 minutes (install SDK, initialize, test). PostHog takes 10 minutes (add script, configure events). You can set up your entire monitoring stack in a single sitting.
Start with UptimeRobot and Sentry — these cover the two most critical signals (is my app up? is my app working?). Add analytics later when you want to understand user behavior. Add log monitoring when you need to debug complex issues.