Fivetran is an automated data movement platform that offers fully managed data connectors to sync data from SaaS applications, APIs, databases, and other structured data sources into target analytical destinations like data warehouses and data lakes. Fivetran was founded in 2012 and has a variety of offerings, all of which are fully-managed, automated, and serve anyone from small startups to large, data-mature enterprises. Airbyte is an open-source data integration engine for building ELT data pipelines that sync data from applications, APIs, and databases to analytical data destinations like data warehouses and data lakes. Airbyte was founded in January 2020 and provides three offerings: Open Source, Cloud, and Enterprise. Both platforms offer hundreds of connectors for various data sources and destinations, but the completeness and support between the connectors differ. Fivetran's connectors are fully supported, uniformly maintained, and managed 24/7, while Airbyte's connectors are built, maintained, and supported by the open-source community. Fivetran offers more advanced features, such as automatic schema migration, column blocking, and column hashing, which cater to database use cases that require network security. Both platforms offer extensive support and documentation, with Fivetran providing 24/7 technical support and Airbyte offering in-app chat support and a Slack and Discourse community. Pricing for both platforms is consumption-based, with Fivetran's pricing calculator allowing users to estimate costs before committing to a solution. Ultimately, the choice between Airbyte Open Source and Fivetran depends on the "buy vs. build" situation, weighing the benefits of open-source flexibility against the need for vendor lock-in and walled gardens.