Pezzo

Paid APISelf-hostedWeb

What Pezzo is

Pezzo is an open-source toolkit for developing AI applications, available through the web, an API, or self-hosting. It centralizes prompt editing, testing, and versioning. Teams can publish a prompt version to a chosen environment or restore an older version. Prompt content can include curly-brace variables, which the Pezzo Client replaces when it calls the model provider.

Pezzo traces requests and records execution time, cost, and error-rate metrics. Its language-agnostic Proxy routes LLM requests through Pezzo without requiring changes to existing LLM-consumption code; the Proxy is licensed under Apache 2.0. The prompt editor supports OpenAI Chat Completion, while Azure OpenAI Chat Completion and Anthropic are listed as coming soon. Client libraries are listed for Node.js and Python, and the documentation includes LangChain monitoring examples for both. Request caching uses the X-Pezzo-Cache-Enabled header; cached requests expire after three days, a duration users cannot configure. The full stack can run locally with Docker Compose, or teams can use Pezzo Cloud, described as managed hosting. Metric alerts are listed as coming soon.

Who it suits

Pezzo suits AI developers who want centralized prompt workflows and request metrics, with web, API, or self-hosted access. Its documented clients support Node.js and Python.

What it does well

Prompts can be edited, tested, and versioned centrally.
Prompt versions can be published or restored.
Request metrics include execution time, cost, and error rate.
Full stack can run locally with Docker Compose.

What to know first

Azure OpenAI and Anthropic are marked as coming soon.
Cached requests expire after three days, without configurable duration.
Metric alerts are listed as coming soon.

Limits

Cached requests expire after three days by default, and this duration cannot be changed. Azure OpenAI Chat Completion, Anthropic support and metric alerts are marked as coming soon.

Getting started

Open Pezzo through its web interface, API or self-hosted route
For self-hosting, run the stack with Docker Compose
Configure the server, console, PostgreSQL and Redis components
Create and version prompts in the editor
Use Node.js or Python clients to call Pezzo
Enable caching with the X-Pezzo-Cache-Enabled header if needed

Verdict

Pezzo combines prompt lifecycle tools with request tracing and metrics, and supports local self-hosting or managed cloud hosting. Its listed prompt provider support is currently limited to OpenAI Chat Completion.

Questions

Is Pezzo free?

Pezzo is described as free and open source.

Which platforms can run Pezzo?

It is available through web, API and self-hosted deployment.

Which model provider works now?

The prompt editor supports OpenAI Chat Completion. Azure OpenAI Chat Completion and Anthropic are marked as coming soon.

Can Pezzo be self-hosted?

Yes. The full stack can run locally with Docker Compose.

Does Pezzo provide SDKs?

Documentation lists client support for Node.js and Python.

How long do cached requests last?

They expire after three days by default, and the duration is not configurable.

Facts from Pezzo's own pages

Alerts: Metric alerts are listed as coming soon in Pezzo’s monitoring documentation. · docs.pezzo.ai, 9 Oct 2026
Caching: Request caching can be enabled with the X-Pezzo-Cache-Enabled header; cached requests expire after three days by default, and that duration is not configurable. · docs.pezzo.ai, 9 Oct 2026
Client libraries: The getting-started documentation lists Node.js and Python client support. · docs.pezzo.ai, 9 Oct 2026
Cloud hosting: Pezzo Cloud is described as a fully managed version hosted and managed by the Pezzo team. · docs.pezzo.ai, 9 Oct 2026
Deployments: Prompt versions can be published instantly to a selected environment, and older versions can be republished. · docs.pezzo.ai, 9 Oct 2026
Integrations: Pezzo documents LangChain integration for observability and monitoring, with Node.js and Python examples. · docs.pezzo.ai, 9 Oct 2026
Model providers: The prompt editor lists OpenAI Chat Completion as supported; Azure OpenAI Chat Completion and Anthropic are marked coming soon. · docs.pezzo.ai, 9 Oct 2026
Observability: Pezzo traces requests and collects LLM metrics including execution time, cost, and error rate. · docs.pezzo.ai, 9 Oct 2026
Open source: Pezzo says its proxy is open source under the Apache 2.0 license. · docs.pezzo.ai, 9 Oct 2026
Open-source license: The Pezzo Proxy is open source under the Apache 2.0 license. · docs.pezzo.ai, 9 Oct 2026
Product: Pezzo is an open-source toolkit for AI development. · docs.pezzo.ai, 9 Oct 2026
Prompt editor: Prompt content can include curly-brace variables that are dynamically replaced when calling the LLM provider through the Pezzo Client. · docs.pezzo.ai, 9 Oct 2026
Prompt management: Pezzo provides centralized prompt management, editing, testing, and versioning. · docs.pezzo.ai, 9 Oct 2026
Prompt providers: The prompt editor lists OpenAI Chat Completion as supported and Azure OpenAI Chat Completion and Anthropic as coming soon. · docs.pezzo.ai, 9 Oct 2026
Proxy: Pezzo Proxy routes LLM requests through Pezzo and is described as language agnostic, requiring no changes to existing LLM consumption code. · docs.pezzo.ai, 9 Oct 2026
SDK clients: The documentation lists client support for Node.js and Python. · docs.pezzo.ai, 9 Oct 2026
Self-hosting: The full Pezzo stack can be run locally with Docker Compose; its documented components include a server, console, PostgreSQL, and Redis. · docs.pezzo.ai, 9 Oct 2026
Support: Pezzo’s documentation links to a Discord community and GitHub repository. · docs.pezzo.ai, 9 Oct 2026

Where Pezzo stands on Freedom251

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