VictoriaMetrics
High-performance, cost-efficient time series database and monitoring solution. VictoriaMetrics is a drop-in Prometheus replacement that offers 10x better compression, significantly lower resource usage, and horizontal scalability via VictoriaMetrics Cluster. Supports Prometheus remote write, PromQL, MetricsQL (extended query language), and native data ingestion formats. Often used as a long-term storage backend for Prometheus, replacing Thanos or Cortex. Powers large-scale monitoring at companies like Roblox, Cloudflare, and others.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Apache 2.0, open source with full audit capability. Default no-auth is a risk — must add reverse proxy auth for production. Enterprise adds LDAP/OAuth. No external data sharing when self-hosted. TLS via reverse proxy.
⚡ Reliability
Best When
You're running Prometheus at scale and need long-term storage with better performance and lower cost than Thanos, or you want a Prometheus-compatible time series DB with 10x compression.
Avoid When
You need full observability (logs + traces + metrics) in one platform — use Grafana Stack or OpenObserve for unified observability.
Use Cases
- • Store and query metrics from Prometheus at scale with lower storage costs and better performance than native Prometheus or Thanos
- • Run PromQL and MetricsQL queries for agent monitoring and alerting pipelines — query current system health metrics programmatically
- • Ingest metrics from multiple Prometheus instances via remote_write for centralized long-term metrics storage
- • Replace expensive managed monitoring (DataDog, CloudWatch) with self-hosted VictoriaMetrics for cost reduction at scale
- • Query application and infrastructure metrics via HTTP API from agent workflows for real-time operational awareness
Not For
- • Log management — VictoriaMetrics is metrics-only; use Loki or OpenObserve for logs
- • Distributed tracing — use Jaeger, Tempo, or OTEL Collector for traces
- • Teams needing a fully managed SaaS with minimal ops burden — VictoriaMetrics Cloud exists but monitoring self-managed VictoriaMetrics still requires expertise
Interface
Authentication
VictoriaMetrics open source: no auth by default (should be behind reverse proxy). vmauth provides authentication proxy with config-file-based username/password. VictoriaMetrics Enterprise adds LDAP, OAuth, and JWT support. Cluster version has per-tenant auth.
Pricing
Apache 2.0 for single-node and cluster. Enterprise features (advanced auth, S3-compatible storage, multi-tenancy) require commercial license. Most use cases are fully covered by the free version.
Agent Metadata
Known Gotchas
- ⚠ VictoriaMetrics uses MetricsQL which extends PromQL — some MetricsQL functions don't work with standard Prometheus clients
- ⚠ Default no-auth configuration requires reverse proxy for production — never expose VictoriaMetrics directly to the internet
- ⚠ High cardinality metrics (unique label combinations) cause performance degradation — agents generating per-request metrics with unique IDs will cause issues
- ⚠ Data retention is configured globally in single-node mode — per-metric retention requires Enterprise multi-tenancy
- ⚠ VictoriaMetrics does not support Prometheus recording rules natively — use vmalert for alerting and recording rules
- ⚠ Cluster mode (vminsert, vmselect, vmstorage) has different API endpoints than single-node — agent code must target correct component
- ⚠ Downsampling of old data (retention filters) requires Enterprise — community version keeps full resolution for the entire retention period
Alternatives
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Scores are editorial opinions as of 2026-03-07.