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Estuary Flow vs Sling

The same facts for both, read from GitHub every night, and the relation a person reviewed.

Estuary FlowSling
LanguageRustGo
LicenceOtherGPL-3.0
Stars982912
Latestv0.6.13v1.6.4
Last push2026-10-062026-10-05
Release cadenceabout 22 days between releasesabout 6 days between releases
Active contributors19 commit authors on the default branch in the last 90 days5 commit authors on the default branch in the last 90 days
Flagsnonenone

How they relate

  • Both replace Fivetran. Alternatives to Fivetran →

    PartialEstuary FlowReal-time CDC and batch connectors into warehouses and other destinations.

    PartialSlingReplicates between databases, files and object storage from a CLI and YAML; far fewer SaaS sources.