being opensource ++ i noticed these services are opportunistic wrappers of docker (which itself is more than that now), then provide a limited amount of builder

being opensource ++ i noticed these services are opportunistic wrappers of docker (which itself is more than that now), then provide a limited amount of builders for a few bucks (probably because it runs on AWS?) these could be interesting for projects which need 100, 1000 builders tho, without being cost prohibitive.