compare
OLake vs Sling
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | OLake | Sling |
|---|---|---|
| Language | Go | Go |
| Licence | Apache-2.0 | GPL-3.0 |
| Stars | 1.5k | 912 |
| Latest | v0.11.3 | v1.6.4 |
| Last push | 2026-10-06 | 2026-10-05 |
| Release cadence | about 4 days between releases | about 6 days between releases |
| Active contributors | 18 commit authors on the default branch in the last 90 days | 5 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Fivetran. Alternatives to Fivetran →
PartialOLakeReplicates databases and Kafka into Apache Iceberg tables; few SaaS sources.
PartialSlingReplicates between databases, files and object storage from a CLI and YAML; far fewer SaaS sources.
OLake
- v0.11.32026-10-05fix(iceberg): bump jackson to 2.22.3 and ignore parquet's shaded copy
- v0.11.22026-09-30feat(discover): tiered schema sampling with partial results on timeout
- v0.11.12026-09-29fix(ci): read AI review settings from secrets, rename environment to ai-code-review
- v0.11.02026-09-25feat: source type in telemetry sync completed event and more config conditions
- v0.10.12026-09-09feat: optional schema discovery and stream validation during sync
Sling
- v1.6.42026-09-28New database connectors: Firebolt, OpenSearch, DynamoDB (scan, batch write and delete_missing), LanceDB (with the DuckD…
- v1.6.32026-09-13See for more details.
- v1.6.22026-09-09See for more details.
- v1.6.12026-09-08Build execution status sync: Platform status reporting for build runs and per-model progress (BuildStatus / BuildModelS…
- v1.6.02026-08-31See for more details.
OLake
✓ signed The latest release, v0.11.3, carries a signature GitHub verified.
Loading the security report
Sling
unsigned The latest release, v1.6.4, carries no signature GitHub could verify.
Loading the security report