head to head · open source
Grafana Loki vs log
Grafana Loki has 28,917 GitHub stars, 4,115 forks, 1,620 open issues and last shipped yesterday. log has 3,394 stars, 102 forks, 41 open issues and last shipped 17 days ago. Grafana Loki leads on adoption by 752% (28,917 vs 3,394 stars). Grafana Loki is written in Go under AGPL-3.0; log is written in Go under MIT. Grafana Loki has attracted 14% as many forks as stars, log 3%. Grafana Loki was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (logging), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Grafana Loki | log | |
|---|---|---|
| GitHub stars | ★ 29K | ★ 3.4K |
| License | AGPL-3.0 | MIT |
| Written in | Go | Go |
| Last push | 2026-09-19 | 2026-09-03 |
| Forks | ⑂ 4.1K | ⑂ 102 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Grafana Loki if
- You weight community size — 29K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick log if
- You want the log feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and log fits your workflow better
About Grafana Loki
Grafana Loki is a log aggregation system designed as the log oriented counterpart to Prometheus. It operates within the cloud native observability ecosystem, specifically targeting Kubernetes and containerized environments. Loki avoids expensive full text indexing by indexing only metadata labels attached to log streams, storing the raw log content in compressed form. This design choice makes Loki significantly simpler to operate and more cost effective than traditional log systems that index every word.
read the full Grafana Loki overview →
About log
Charm's log is a minimal, colorful, MIT licensed logging library for Go, aimed at Go developers who want leveled, structured, human readable output and a small API instead of hand assembling formatting and level filtering on top of the standard library.
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Frequently asked questions
Is Grafana Loki or log more popular?
Grafana Loki has 28,917 GitHub stars and log has 3,394. Grafana Loki has the larger community by that measure.
Are Grafana Loki and log free?
Both are open source. Grafana Loki is licensed under AGPL-3.0 and log under MIT. Neither carries a licence fee.
What is the difference between Grafana Loki and log?
Grafana Loki is written in Go and log in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Grafana Loki or log?
Choose Grafana Loki if you want the larger community (28,917 stars) or its AGPL-3.0 licence terms. Choose log if its feature set, stack or MIT licence fits better. Both are self-hostable.