Pezzo is a developer-first platform that centralizes prompt management, versioning, observability, and one-click/instant deployments so teams can deliver AI features faster and with more control. Key capabilities documented include a prompt editor with versioning and environment support, commit/publish flows, instant deployments to Production without a full release cycle, observability and monitoring (requests view, request history, execution duration, and cost metrics for prompts and completions), and troubleshooting tools described as “time travel” for debugging failed prompts and rolling fixes forward. Pezzo provides a proxy (Pezzo Proxy) to intercept OpenAI calls to capture telemetry and metadata and documents authentication headers for proxying: X-Pezzo-Api-Key, X-Pezzo-Project-Id, and X-Pezzo-Environment. There are referenced official Node.js and Python clients and a LangChain integration (proxy-based for Node & Python) to add observability with minimal code change. Pezzo is self-hostable and open-source (pezzolabs/pezzo) with Docker Compose instructions and dependencies (Postgres, ClickHouse, Redis, Supertokens) in the repository. The product exposes an API health endpoint at https://api.pezzo.ai/api/healthz and documents usage in the docs. Legal highlights on the site include Terms of Use provisions for subscription billing, refund/pause terms, arbitration and class-action waiver with an opt-out window, and user content license provisions; the Privacy Policy distinguishes personal vs non-personal data, describes legal/process sharing, and lists contact [email protected] (policy last updated 26/05/2023). Important gap: the site’s /pricing page returns a 404 and no public pricing plans, tiers, or explicit price points were located in the site or docs. Automated check returned has_free_trial = false and no detected pricing models or plans. The Terms reference paid subscriptions and billing mechanics but do not publish public price points.