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Prompty: Prompty makes it easy to create, manage, debug, and evaluate LLM prompts for your AI applications. It is listed under Development & Code on AI Registry as a free tool.
The tools below are approved listings in the same category, ordered by how closely their tags match Prompty. This is an automatic list. We have not written a researched verdict for Prompty yet, so treat it as a shortlist and check each vendor's pricing page before switching.
Built from each tool's listing. Vendors can update their own listing after claiming it.
Mellea is a library for writing generative programs.
Mellea is an open source Python library, released under Apache 2.0, for getting structured, validated and testable output from large language models. It treats each LLM call as something a developer can specify, test and reason about, rather than a prompt that fails silently. The core idea is that Python code, not pro...
Open source version of Claude Managed Agents.
Agentor is an open source Python framework from Celesto AI for building, deploying and operating long running AI agents. It includes tool use, MCP support, the A2A agent to agent protocol and durable execution, and a working agent with tools can be created and served in a few lines of code. It is designed for develope...
We turn natural language descriptions of behaviors into machine-executable code
AmadeusGPT is an open source natural language interface for analyzing animal behavior, developed in the adaptive intelligence lab led by Mackenzie Mathis. Researchers describe a behavior in plain language, and a large language model such as GPT3.5 or GPT4 writes machine executable code against the AmadeusGPT API, which...
Minimal typescript agent framework that keeps it simple and gives you control - no BS
AXAR AI is a lightweight, open source framework for building agentic applications in TypeScript. It installs from npm as a single package and aims to let developers write LLM powered agents with ordinary coding practices rather than a large set of abstractions, keeping setup minimal and leaving the developer in control...
Stateful runtime management for LLM agents—inject, manipulate, and retrieve Python objects across turns.
CaveAgent is an open source Python framework from an academic research team that changes how a language model agent uses tools. Instead of treating the model's text context as the workspace, it pairs a semantic stream for lightweight reasoning with a runtime stream backed by a persistent Python environment. The model w...
Open-source ecosystem for building AI-powered conversational solutions using RAG, agents, FSMs, and LLMs.
ChatFAQ is an open source conversational platform for building generative AI customer service and search assistants. It provides a chat service that answers questions from an organisation's own source material, links each answer back to the files and URLs used, collects user feedback, keeps conversational memory and wo...