compare
KRR vs OpenCost
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | KRR | OpenCost |
|---|---|---|
| Language | Python | Go |
| Licence | MIT | Apache-2.0 |
| Stars | 4.7k | 6.8k |
| Latest | v1.30.0 | v1.121.3 |
| Last push | 2026-09-17 | 2026-10-06 |
| Release cadence | about 57 days between releases | about 20 days between releases |
| Active contributors | 4 commit authors on the default branch in the last 90 days | 23 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Kubecost. Alternatives to Kubecost →
PartialKRRCPU and memory request recommendations from Prometheus history, without cost allocation.
PartialOpenCostThe cost allocation engine Kubecost is built on, without its savings recommendations or multi-cluster views.
KRR
- v1.30.02026-08-24Fix CVEs by removing unused OS packages and updating dependencies
- v1.29.02026-07-21[ROB-2920] CVE patches enforcer
- v1.28.02025-12-31To address CVEs and align with end-of-life policies, KRR no longer supports Python 3.9.
- v1.27.02025-10-15Group Kubernetes Jobs by labels via --job-grouping-labels <l1,l2,...> to get one consolidated recommendation per group.
- v1.26.32025-09-08Improved aws assume role support
OpenCost
- v1.121.32026-09-16Allocation autocomplete: Support label aliases
- v1.121.22026-09-11Fix Pricing Action & Debug 403
- v1.121.12026-08-05feat(aws): add Athena query result reuse configuration
- v1.121.02026-07-20KubeModel Changes
- v1.120.42026-06-25Updated UI image build commands from parcel → react-router/vite && Th…
KRR
✓ signed The latest release, v1.30.0, carries a signature GitHub verified.
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OpenCost
✓ signed The latest release, v1.121.3, carries a signature GitHub verified.
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