We were using Alooma for ETL for years until Google bought it and started to deprecate AWS connections. It was a massive PITA, but it mostly worked. We switch

We were using Alooma for ETL for years until Google bought it and started to deprecate AWS connections. It was a massive PITA, but it mostly worked. We switched over to AWS DMS and it was easy. Honestly it didn't take much effort. It has worked flawlessly - literally zero errors - from the day we started it up, and best of all, it's free. All you pay for is the instance it's using for you. That sort of thing can save startups much needed money. Yes, you're tied to the ecosystem - and that's what they want - but it's worth it. Once I talk to people and basically say the same thing you're saying, they start to look at AWS a bit differently.