I saw this project a few months ago and I'm really surprised how fast they've been adding new connectors [1]. I was initially a little doubtful about them implementing their own protocol [2] instead of using Singer [3], already OOS, but it looks like it panned out for them. In fact I've been using Stitch Data for a couple of years and I've find myself "fighting" with their support team about bugs I think we're Singer related, mainly with DDL commands.

[1] https://docs.airbyte.io/changelog/connectors [2] https://airbyte.io/articles/data-engineering-thoughts/why-yo... [3] https://www.singer.io/