Out of all the projects/products on this list, we've found Victoria Metrics to be by _far_ the best.<p>This summary makes it seem like Victoria Metrics is barely compatible with Prometheus, but that can't be further from the truth in practice.
VictoriaMetrics CTO here.<p>These tests are great, because they spotted a few minor bugs in our PromQL implementation and these bugs were fixed quickly. See <a href="https://victoriametrics.github.io/CHANGELOG.html" rel="nofollow">https://victoriametrics.github.io/CHANGELOG.html</a> .<p>The majority of failed tests for VictoriaMetrics cannot be "fixed" due to deliberate choice made when designing MetricsQL: to rethink and to fix the most annoying and confusing parts of PromQL, while providing drop-in PromQL replacement for the majority of practical cases. See more details at <a href="https://victoriametrics.github.io/MetricsQL.html" rel="nofollow">https://victoriametrics.github.io/MetricsQL.html</a> .