Plano

Plano is an open source, AI native proxy and data plane for agentic applications. It takes over the plumbing that slows teams building agents, so developers can concentrate on their agents' product logic. It is built on Envoy and is configured through a single file that describes the prompts an app supports, the APIs to plug in and the language models to use. Its functions include agent routing and orchestration across multiple agents without tying a team to one framework, smart model routing APIs for choosing between language models, guardrail hooks that detect and block jailbreaks, reusable filters for context engineering, and centralized observability with rich agentic traces. The vendor also describes production signals, including trace sampling for faster error analysis, that feed reinforcement learning and continuous improvement. It works with any language or AI framework and supports on premises deployment for regulated environments with full data control. Plano is aimed at engineering teams that want to standardize policies and access controls across every agent and model, and at developers moving prototypes to production. The site notes that DigitalOcean has acquired Katanemo Labs, the company behind it. Pricing is not published. The project is presented as open source, and the site lists no paid plans or usage rates.