Startups make two monitoring mistakes. The first is spending $500/month on Datadog before they have paying customers — full-stack observability for a service that handles 200 requests per day. The second is spending $0/month on nothing until a production outage takes the app down for 45 minutes and the first Hacker News comment reads "looks like it's dead."
Both mistakes share the same root cause: treating monitoring as a binary choice between enterprise observability and hope. Startups don't need distributed tracing across 50 microservices. They need to know when their app goes down, how long it was down, and a way to tell users what's happening. The right monitoring tool at the right stage costs between $0 and $30/month and takes 15 minutes to set up.
We evaluated six monitoring tools through the lens of startup growth stages — from a side project running on a single $5 VPS to a Series A company with a growing engineering team. Every price below was verified against official pricing pages in June 2026.
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