For our startup, I decided we’d self-host as much as possible. We have one server in our office with Traefik for “firewall” and SSL termination, and our backend services are handled by Incus. Our only paid services are Tailscale and Postmark. We run things like forgejo and mattermost for our internal development work, as well as things like elasticsearch and kibana for observability into our products (100ish embedded devices distributed globally). So far so good.