Glances
Glances 4.5.9 closes out the 4.x line as a 5.0 beta opens for testing.
Comparison · Analytics
Cortex vs Grafana Loki
A side-by-side editorial comparison of Cortex and Grafana Loki — release velocity, themes, recent moves, and the top alternatives to consider.
Cortex vs Grafana Loki: at a glance
What is Cortex?
Cortex 1.22 is on its fourth candidate, with sharded Parquet and years of deprecated flags removed.
Cortex 1.22.0 has been in release candidates since 12 September, reaching rc.3 on 6 October, and GitHub shows no final yet. The candidate adds sharded Parquet conversion and querying, resource-based query eviction that cancels the heaviest query when CPU or heap crosses a threshold, OCI Object Storage as a backend, and an active-series tracker per tenant. It also removes long-deprecated flags and config fields, some of which now stop Cortex from starting if left in place.
What is Grafana Loki?
Loki 4.0 reaches RC3 and narrows S3 storage classes to Standard and Standard-IA.
Loki 4.0 is moving through release candidates. RC1's notes list the breaking changes: the V2 query engine unplugged, Simple Scalable Deployment targets and old /api/prom endpoints removed, protobuf as the default frontend encoding, and several deprecated settings and metrics dropped. RC2 removed every index backend but TSDB, and RC3 adds one more break, limiting S3 storage classes to STANDARD and STANDARD_IA, plus a compactor delete fix.
Cortex vs Grafana Loki: editorial side-by-side
Cortex
2.5ANALYTICS
Cortex 1.22 is on its fourth candidate, with sharded Parquet and years of deprecated flags removed.
◆ Current state
Cortex 1.22.0 has been in release candidates since 12 September, reaching rc.3 on 6 October, and GitHub shows no final yet. The candidate adds sharded Parquet conversion and querying, resource-based query eviction that cancels the heaviest query when CPU or heap crosses a threshold, OCI Object Storage as a backend, and an active-series tracker per tenant. It also removes long-deprecated flags and config fields, some of which now stop Cortex from starting if left in place.
◆ Where it's heading
The storage arc toward Parquet continues: after 1.21 made Parquet a Store Gateway query mode, 1.22 shards files that exceed column limits. A second arc is protecting shared clusters from heavy tenants, through query eviction, resource-based throttling and concurrent data-byte limits on store gateways. The cleanup is the maturity arc from 1.21 carried further: no-op flags that were tolerated for releases now fail at startup.
◆ Prediction
1.22.0 final should follow rc.3, which added only two fixes. Operators should expect upgrade failures from leftover deprecated flags, and the release notes tell them to grep runtime configs before upgrading.
Grafana Loki
6.3ANALYTICS
Loki 4.0 reaches RC3 and narrows S3 storage classes to Standard and Standard-IA.
◆ Current state
Loki 4.0 is moving through release candidates. RC1's notes list the breaking changes: the V2 query engine unplugged, Simple Scalable Deployment targets and old /api/prom endpoints removed, protobuf as the default frontend encoding, and several deprecated settings and metrics dropped. RC2 removed every index backend but TSDB, and RC3 adds one more break, limiting S3 storage classes to STANDARD and STANDARD_IA, plus a compactor delete fix.
◆ Where it's heading
Each candidate trims a bit more legacy surface, so 4.0 is a cleanup major that pushes installs onto TSDB and the microservices or single-binary layouts. The Operator had prepared this path since 0.11 and 0.12.
◆ Prediction
Expect a few more RCs with small breaking changes, then 4.0.0 GA and an Operator release that drops the removed schemas.
Alternatives to Cortex and Grafana Loki
Other Analytics products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Cortex or Grafana Loki.
Calibre
Calibre MCP lets your coding agent read RUM and Lighthouse data, then fix the slow code
Dovetail
Dovetail opens its docs to Claude and ChatGPT as co-authors.
Apache SkyWalking
SkyWalking 11.1 builds service maps from OpenTelemetry traces, no SkyWalking agent required.
OpenReplay
OpenReplay's feed is Helm chart bumps behind its asset-cacher deny list.
Tinybird
Tinybird shrinks its Local image by a third after a run of observability updates.
See all Cortex alternatives → · See all Grafana Loki alternatives →
Recent activity from Cortex and Grafana Loki
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoGrafana LokiLoki 4.0 RC3 limits S3 storage classes to Standard and IA
- 4d agoGrafana LokiLoki 4.0 RC1 lists the breaking changes for the major
- 5d agoGrafana LokiLoki 4.0 RC drops legacy storage backends and SSD mode ⚡
- 18d agoGrafana LokiLoki Helm chart 7.5.0 released
- 1mo agoGrafana LokiLoki Operator 0.12 requires schemas, adds OpenShift 5.0 TLS
- 1mo agoCortex1.22 candidate 4 fixes tenant-deletion cleanup on GCS and Azure
- 1mo agoCortex1.22 candidate 3 fixes the ingestion-delay histogram
- 1mo agoCortex1.22 candidate 2 adds three bug fixes
- 1mo agoCortex1.22 candidate: sharded Parquet, query eviction, OCI storage
- 2mo agoGrafana LokiLoki Operator 0.11 enables multi-variant queries
- 5mo agoCortex1.21.1 candidate hardens gossip, ingestion and status pages
- 6mo agoCortex1.21.0-rc.1 fixes memberlist, tenant federation and a memory leak
Frequently asked questions
What is the difference between Cortex and Grafana Loki?
They serve adjacent needs but don't currently overlap on shipped themes. Grafana Loki is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Cortex better than Grafana Loki?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Grafana Loki is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to Cortex?
Top Cortex alternatives in Analytics are ranked by recent ship velocity. Browse the "Cortex alternatives" section above for the current picks, or visit /alternatives/cortex-metrics for the full list with editorial commentary on each.
What are the best alternatives to Grafana Loki?
Top Grafana Loki alternatives in Analytics are ranked by recent ship velocity. Browse the "Grafana Loki alternatives" section above for the current picks, or visit /alternatives/loki for the full list with editorial commentary on each.