Open-source relay. Managed control plane.
The byte-relay data plane is the open-source Thirp Runtime project: Broker, Agent, Caller libraries, CLI tools, and local file-backed policy. Thirp Cloud adds a managed control plane for identity, policy, audit, usage, and hosted Broker operation — so you can run reachability without building that layer yourself.
The long-running customer-side process is thirp-agent from a Thirp Runtime release. thirp agent enroll writes its managed agent.conf and agent.token. That is configuration for the same Agent, not a second Agent product.
The open-source data plane remains independently useful and auditable. Run it yourself with file-backed policy, or use Thirp Cloud when you want managed identity, policy, audit, usage, and hosted operation. The hosted control plane is not open source.