Prompt Managers & Versioning
Platforms and libraries for writing, storing, versioning and deploying prompts, including prompt IDEs, registries and template formats.
OpenLIT
An OpenTelemetry-native observability platform for LLM and agent applications that also includes a prompt hub for versioned prompts and a vault for provider secrets.
W&B Weave
The Weights & Biases toolkit for LLM applications, automatically versioning prompts, code and datasets as objects and tracking every call for comparison and scoring.
Latitude
An open-source platform where prompts are written in a templating syntax, versioned in projects, evaluated against datasets and then deployed as callable endpoints.
Prompt Driven Development
A CLI that treats prompt files as the source of truth and generates code, tests and examples from them, so edits are made to the prompt and the code is regenerated.
PromptLayer Python Library
The open-source client library for PromptLayer that logs prompts and responses, attaches metadata and tags, and retrieves prompt templates from the hosted registry.
PromptPerfect
A Jina AI product that automatically rewrites and optimizes a draft prompt for a chosen model, offering streaming comparison of the original and improved versions.
PromptTools
An open-source toolkit for experimenting with prompts across models and vector databases, running grids of prompt variants from a notebook and scoring the results.
Klu
A platform for designing, deploying and optimizing LLM applications, with collaborative prompt editing, versioned deployments and evaluation of saved test cases.
LangSmith
LangChain's hosted platform for tracing, evaluating and managing prompts, including a prompt hub with versioned prompts that can be pulled by the LangChain SDKs.
Jasper
A marketing-focused AI platform with brand voice settings, reusable templates and agents, where prompt configuration is handled through campaign-level controls.
Dotprompt
A Google specification for executable prompt files that keep the template, model settings and input and output schemas together in a single portable text file.
LangWatch
An open-source platform for LLM evaluation and agent testing with prompt versioning, scenario-based agent simulations and an optimization studio built on DSPy.
Adaline
An observability and evaluation platform that turns production traces into datasets and prompt improvements, marketed for teams running self-improving agents.
Respan (Keywords AI)
An LLM engineering platform, previously branded Keywords AI, that combines observability, evaluations, prompt optimization and a model gateway behind one API.
Promptmetheus
A prompt engineering IDE for composing prompts from reusable blocks, testing variants across providers and tracking cost and output quality for each version.
Promptr
A command-line tool that applies plain-language instructions to files in a project, using Liquid templates so reusable instruction sets can be parameterised.
Coze Loop
ByteDance's open-source agent development platform covering prompt development and versioning, evaluation datasets and production observability in one loop.
Opper AI
A European-hosted gateway that exposes hundreds of models through a single API with built-in task definitions, spend controls and data residency guarantees.
Relevance AI
A no-code platform for building specialist AI agents and multi-step workflows, where each agent's instructions and tools are configured in a visual builder.
Laminar
An open-source observability platform purpose-built for AI agents, combining span tracing, online and offline evaluations and labelling of production data.
Pezzo
An open-source LLMOps platform for designing, versioning and publishing prompts from a central console, with observability over the requests that use them.
Orq.ai
A European AI gateway and platform that routes requests to hundreds of models while providing prompt management, guardrails, spend caps and audit logging.
Taskade
A workspace that combines project management with configurable AI agents and prompt-driven automations that operate on the team's own documents and tasks.
Braintrust
An evaluation and observability platform for AI products, with a prompt playground, dataset management, scorers and production tracing in one workspace.
LastMile AI
A developer platform for building and evaluating AI applications, known for the open AIConfig prompt format and small purpose-built evaluator models.
Dust
A workspace where teams build and share custom assistants connected to company tools and documents, with prompt instructions managed per assistant.
PromptFolder
A personal prompt manager for saving, organising and reusing prompts across ChatGPT, Midjourney and other tools, with folders and quick insertion.
TrueFoundry
An enterprise AI gateway that centralises model access, rate limiting and governance, with prompt and MCP management for internal teams.
HoneyHive
An observability and evaluation platform for agents, combining tracing, datasets, prompt experiments and human review in one workspace.
Writesonic
A content and AI-search visibility platform whose tooling generates and tracks brand content across several assistant platforms.
Copy.ai
A go-to-market AI platform with prompt-driven workflows and reusable content briefs that run across sales and marketing data.