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Open-source telemetry collectors and pipelines in 2026

8 open-source projects, ranked by GitHub stars and how recently each was worked on. Vector leads with 23k stars, ahead of Telegraf. 5 had code pushed in the last three months. Most common licenses: Apache-2.0 (5), MPL-2.0 (1) and MIT (1). Commercial telemetry collectors and pipelines are listed separately.

All open-source telemetry collectors and pipelines, ranked

Complete systems you can adopt 5

  1. 1
    Vector vectordotdev

    A high-performance observability data pipeline.

    Complete system Production-ready You need a fast, single-binary agent or aggregator to reshape and ship telemetry, for example to cut observability costs.

    ★ 23k MPL-2.0 Rust Active, pushed today
  2. 2
    Telegraf influxdata

    Agent for collecting, processing, aggregating, and writing metrics, logs, and other arbitrary data.

    Complete system Production-ready You need to gather metrics from many kinds of systems, including industrial equipment, with one agent.

    ★ 18k MIT Go Active, pushed today
  3. 3
    Fluentd fluent

    Fluentd: Unified Logging Layer (project under CNCF)

    Complete system Production-ready You need a central log aggregator with plugins for unusual sources or destinations.

    ★ 14k Apache-2.0 Ruby Active, pushed yesterday
  4. 4
    Fluent Bit fluent

    Fast and Lightweight Logs, Metrics and Traces processor for Linux, BSD, OSX and Windows

    Complete system Production-ready You need a light log and metrics shipper on many machines or containers.

    ★ 8.2k Apache-2.0 C Active, pushed today
  5. 5
    Octopussy Octopussy-Project

    Octopussy - Open Source Log Management Solution

    Complete system Experimental Not for new deployments.

    ★ 164 GPL-3.0 Perl Quiet, pushed 6 years ago

Building blocks for your own system 3

  1. 1
    OpenTelemetry Collector open-telemetry

    OpenTelemetry Collector

    Building block Production-ready You instrument with OpenTelemetry and want one pipeline to route telemetry to one or more backends.

    ★ 7.7k Apache-2.0 Go Active, pushed today
  2. 2
    Logkit qiniu

    Very powerful server agent for collecting & sending logs & metrics with an easy-to-use web console.

    Building block Usable Only if you already run it.

    ★ 1.4k Apache-2.0 Go Quiet, pushed 2 years ago
  3. 3
    Logagent-js sematext

    Extensible log shipper with input/output plugins, buffering, parsing, data masking, and small memory/CPU footprint

    Building block Usable Only if you already use it; Fluent Bit or Vector are better maintained.

    ★ 391 Apache-2.0 JavaScript Quiet, pushed 2 years ago

Compared head to head

Cribl Stream vs Datadog Observability PipelinesDatadog Observability Pipelines vs VectorDatadog Observability Pipelines vs TelegrafDatadog Observability Pipelines vs FluentdCribl Stream vs VectorCribl Stream vs TelegrafCribl Stream vs FluentdTelegraf vs VectorFluentd vs VectorFluentd vs Telegraf

Also under monitoring and observability tools

Uptime monitorsStatus page toolsIncident management and on-call toolsLog management toolsError tracking tools

Open-source licenses

  • Permissive: 6. Use it anywhere, including in closed products. You keep the copyright notice; Apache-2.0 also grants patent rights.
  • Weak copyleft: 1. Changes to the licensed files must be shared, but you can link them into a closed program.
  • Strong copyleft: 1. If you distribute the program or anything built on it, you must release the whole source under the same license.

Languages

Go 3, Rust 1, Ruby 1, C 1, JavaScript 1 and Perl 1.

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