compare
Cortex vs M3
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Cortex | M3 |
|---|---|---|
| Language | Go | Go |
| Licence | Apache-2.0 | Apache-2.0 |
| Stars | 5.9k | 4.9k |
| Latest | v1.21.1 | v1.6.0 |
| Last push | 2026-10-19 | 2026-10-14 |
| Release cadence | too few releases | about 69 days between releases |
| Active contributors | 19 commit authors on the default branch in the last 90 days | 6 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
M3 replaces Cortex. Alternatives to Cortex →
Full replacementDistributed, multi-tenant storage backend for Prometheus remote write.
Cortex
- v1.22.0-rc.32026-10-06This is the fourth release candidate for v1.22.0.pre-release
- v1.22.0-rc.22026-09-26This is the third release candidate for v1.22.0.pre-release
- v1.22.0-rc.12026-09-21This is the second release candidate for v1.22.0.pre-release
- v1.22.0-rc.02026-09-12This is the first release candidate for v1.22.0.pre-release
- v1.21.12026-06-05[BUGFIX] gRPC: Fix panic when grpc_compression is set to snappy on ingester client or store-gateway client configuratio…
M3
- v1.6.02026-09-25These affect users who import M3 as a Go library. Deployed binaries, on-disk formats and wire formats are unchanged.
- v1.5.02022-04-07M3DB: Optimize snapshotting by 30x or more which can speedup bootstrapping for workloads with large snapshots. (#4093)
- v1.4.22022-01-19M3Coordinator: Guard against duplicate rollup tags in aggregation matching logic. (#3950)
- v1.4.12021-11-20M3Coordinator: Do not Close singleton MessageProcessors when closing connections. This fixes a panic introduced that af…
- v1.4.02021-11-19M3Query: Add write endpoint support for M3-Map-Tags-JSON header in InfluxDB path (#3816)
Cortex
✓ signed The latest release, v1.21.1, carries a signature GitHub verified.
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M3
unsigned The latest release, v1.6.0, carries no signature GitHub could verify.
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