Fivetran is a popular managed ingestion service because it removes a hard operational problem: keeping source connectors running. Many teams should buy managed ingestion rather than maintain brittle scripts. The reason teams look for Fivetran alternatives is usually about control, deployment constraints, customization, or the realization that ingestion is only one part of the pipeline.
A Fivetran alternative can mean several different things. Airbyte and Meltano appeal to teams that want open-source connector control. Hevo, Rivery, Portable, Stitch, and Matillion appeal to teams that want managed or visual ETL/ELT options. Estuary and dlt are relevant for specific ingestion patterns. Bruin is relevant when the team wants ingestion plus SQL/Python transforms, quality checks, orchestration, catalog, lineage, and governance in one workflow.
The most important question is whether you want to replace a connector service or reduce the number of tools around it. If all you need is managed SaaS ingestion, a specialized ELT vendor may be best. If every new source still requires separate transformation, checks, scheduling, access controls, and lineage, consider a platform that treats ingestion as the first step of a governed pipeline.