Grafana Agent vs Alloy: What Changed and Why

TL;DR: Grafana Agent reached End-of-Life on November 1, 2025 and has been replaced by Grafana Alloy. Alloy consolidates Agent's Static mode, Flow mode, and Kubernetes Operator into a single collector built on the OpenTelemetry Collector while maintaining native support for Prometheus and Loki. If you're using Flow mode, migration is relatively straightforward. If you're using Static mode, the migration process will involve reviewing and testing the converted configuration. Before switching over, verify relabeling rules, recheck resource usage, and confirm that Prometheus and Loki are receiving the same data and labels as before. If you're still running Promtail, it's worth migrating both to Alloy at the same time since Promtail is also End-of-Life. If you deployed Grafana Agent a couple of years ago, there's a good chance you haven't thought about it since. It quietly collects metrics, ships logs, and generally stays out of the way. What you may not realize is that Grafana Agent reached End-of-Life on November 1, 2025. That includes Static mode, Flow mode, and the Kubernetes Operator. Grafana Labs has stopped creating bug fixes, security patches, and official support. If you're still running it, your collection layer is probably still performing normally, but is now unsupported. That doesn't necessarily mean it will stop working tomorrow, plenty of unsupported software continues running for years. It does mean you're taking on the risk yourself, especially as the rest of your monitoring stack continues to evolve. This article covers why Grafana Labs replaced Agent with Alloy, what actually changes during the migration, and where people tend to run into problems. Why Grafana Agent was deprecated One of the biggest issues with Grafana Agent is that it was essentially three agents, not one product: Static mode, which used YAML and looked similar to Prometheus. Flow mode, which introduced a component-based configuration using River. The Kubernetes Operator, which manage