Telegraf
Plugin-driven server agent that collects, processes, aggregates, and writes metrics from 300+ input sources to 80+ output destinations.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Secrets for output plugins are stored in plaintext telegraf.conf unless externalized via environment variables or secrets stores. TLS support exists for most plugins but must be manually configured.
⚡ Reliability
Best When
You need a lightweight, plugin-rich metrics agent that runs on every host and writes to InfluxDB or Prometheus-compatible backends.
Avoid When
Your primary need is log aggregation or distributed tracing rather than numeric time-series metrics.
Use Cases
- • Agent monitors system CPU, memory, and disk metrics and writes them to InfluxDB for alerting
- • Agent collects application-level metrics from a REST endpoint and ships them to a central aggregator
- • Agent configures Telegraf to scrape Prometheus /metrics endpoints and forward to a remote write destination
- • Agent sets up Telegraf MQTT consumer plugin to ingest IoT sensor data into a time-series database
- • Agent configures Telegraf as a statsd listener to receive application metrics pushed from microservices
Not For
- • Collecting structured logs (use Fluentd, Promtail, or Vector instead)
- • Distributed tracing and span collection (use OpenTelemetry Collector or Jaeger)
- • Real-time stream processing with complex stateful transformations
Interface
Authentication
Self-hosted binary; upstream outputs (InfluxDB, Kafka, etc.) have their own auth configured in telegraf.conf. No API server exposed by default.
Pricing
Telegraf itself is free and open source. Costs may arise from the downstream storage system (e.g., InfluxDB Cloud).
Agent Metadata
Known Gotchas
- ⚠ Plugin config errors are not always caught at startup — agent may silently drop metrics if an output is misconfigured
- ⚠ 300+ plugins means dependency resolution is complex; unused plugins still compile into the binary (use custom builds to trim)
- ⚠ telegraf.conf uses TOML with array-of-tables syntax that is easy to misformat, causing silent misparse
- ⚠ Interval and flush_interval settings interact in non-obvious ways; too-short intervals can cause metric bursts on output
- ⚠ Some input plugins require elevated OS permissions (e.g., SMART, kernel) that are easy to miss in containerized environments
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Telegraf.
Scores are editorial opinions as of 2026-03-06.