Founder is active on HN and the service is high quality. Support is reasonable. Machines are fast and work well. There are a bunch of alternatives, the switching cost is extremely low, pick whatever you'd like.

Founder of WarpBuild here. We have faster compute: baremetal for amd64 workloads, AWS for arm64 etc.

We optimize for overall performance in real world jobs and have a broad selection of regions/OSes/arch available. There aren't any fixed subscription fees either.