The original title is "Cost-Effective Observability: The 80/20 Stack for Startups"

Short summary

Startups can build enterprise-grade observability for under $200/month using open-source tools (Prometheus, Grafana, Loki, Jaeger) instead of paying Datadog's $5K+/month. The guide provides production-ready Helm configs, Python instrumentation code, and five essential alerts for monitoring uptime, latency, errors, disk, and memory. Stage your stack by team size—Prometheus+Grafana at 5 engineers, add Jaeger at 15, and consider managed services only at 30+ engineers.

• •Prometheus+Grafana+Loki stack costs ~$150/month vs Datadog's $5K+
• •Production-ready Helm charts and Python instrumentation code included
• •Stage your tools by team size—don't over-engineer early, don't skip stages

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