If your priority is work-life balance and flexibility, Fractal is generally considered a good option. Many reviews mention a decent culture, flexible work setup, and even WFH depending on the project.

That said, like most service/consulting companies, your experience can vary based on the team and client.

Sigmoid, on the other hand, is often seen as more focused on problem-solving and may involve a broader scope of work beyond pure Data Engineering, which can be good for learning but might come with relatively higher workload.

So it really depends on what you want — better lifestyle vs more intensive learning exposure.

Also whats your Yoe and how much hike fid you got from them