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Products that do what PromptProof does

Test your LLM prompts with statistical confidence

  1. 1

    Monitor your brand’s LLM visibility, and how to improve it

    Oct 2025

  2. 2PE

    Nowadays, a common AI tech stack has hundreds of different prompts running across different LLMs. Three key problems: - Choices, picking from 100s of LLMs the best LLM for that 1 prompt is gonna be challenging, you're probably not picking the most optimized LLM for a prompt you wrote. - Scaling/Upgrading, similar to choices but you want to keep consistency of your output even when models depreciate or configurations change. - Prompt management is scary, if something works, you'll never want to touch it but you should be able to without fear of everything breaking. So we launched Prompt…

    2024 · jigsawstack.com

  3. 3AP

    2023 · promptperfect.jina.ai

  4. 4RY

    Hey HN, we've just finished building a dynamic router for LLMs, which takes each prompt and sends it to the most appropriate model and provider. We'd love to know what you think! Here is a quick(ish) screen-recroding explaining how it works: https://youtu.be/ZpY6SIkBosE Best results when training a custom router on your own prompt data: https://youtu.be/9JYqNbIEac0 The router balances user preferences for quality, speed and cost. The end result is higher quality and faster LLM responses at lower cost. The quality for each candidate LLM is predicted ahead of time…

    2024 · unify.ai

  5. 5

    LLM prompt testing suite

    2024

  6. 6PO

    Hey HN! We’re Kevin and Steve. We’re building PromptTools (https://github.com/hegelai/prompttools): open-source, self-hostable tools for experimenting with, testing, and evaluating LLMs, vector databases, and prompts. Evaluating prompts, LLMs, and vector databases is a painful, time-consuming but necessary part of the product engineering process. Our tools allow engineers to do this in a lot less time. By “evaluating” we mean checking the quality of a model's response for a given use case, which is a combination of testing and benchmarking. As examples: - For generated…

    2023 · github.com

  7. 7
    Flapico149

    Prompt versioning, testing, and evaluation

    2025

  8. 8
    Prompts123

    LLMOps and prompt engineering

    2023

  9. 9

    Instantly test and compare AI prompts results across models

    2025

  10. 10PC
  11. 11PE

    Spelltest framework simulates conversations between AI ‘synthetic users' in an environment to test and refine LLM-based applications. It ensures your app converse with utmost accuracy and relevance. Post-chat, Spelltest assesses responses, providing qualitative and quantitative feedback on performance. Suitable for both chat and completion modes. When to use: - After modifying your prompt. - When your LLM provider updates. - As a CI step for you repo. All feedback and collaborations appreciated!

    2023 · github.com

  12. 12

    Generate the perfect prompt for GPT4 & open source models

    2024

  13. 13

    The context manager and skills library for marketing teams

    Apr 2026 · promptr.ai

  14. 14

    AI that builds you a deterministic evaluation in minutes

    2025

  15. 15

    Ship prompt changes without touching your codebase

    Jun 2026 · promptvlt.com

  16. 16PD
  17. 17PP

    We are excited to show Promptly (https://trypromptly.com), a prompt management platform for LLM apps that makes it easy to experiment, share and manage prompts in production. With Promptly, users can: - Try out different prompts and model parameters for various providers - Quickly share prompt snippets together with parameters and generated output. Think of it as CodePen or JSFiddle for prompts - Create high level endpoints on top of provider APIs (Open AI, DreamStudio etc) with templated and versioned prompts - Use built-in caching for endpoints that will help save on Open AI…

    2023 · trypromptly.com

  18. 18

    Version, Evaluate & Publish your Prompt without any PR cycle

    Apr 2026 · promptot.com

  19. 19RA

    Hey everyone! Along with my team, I've developed a reinforcement learning system that automatically optimizes LLM prompts, complete with a visualization feature to track both prompt structure and learning progress over time. Take a look here: https://nomadic-ml.github.io/nomadic/cookbooks/Nomadic_Promp... Check out our website too:https://www.nomadicml.com/ In terms of how this visualization works: The RL Prompt Optimizer employs a reinforcement learning framework to iteratively improve prompts used for language model evaluations. At each episode, the…

    2024 · nomadic-ml.github.io

  20. 20

    A type system for LLM prompts. Ship with confidence.

    Apr 2026 · github.com

  21. 21

    30+ business prompts ready to use for your favorite LLM

    2025

  22. 22

    Unlock LLMs with structured, spec-driven prompt engineering.

    Sep 2025

  23. 23

    EU-Native LLM Observability. Stop Flying Blind on AI Spend.

    Feb 2026

  24. 24IB

    Hi HN, I'm pleased to share Promptspot, an open-source (Apache License 2.0) project that helps automate testing of large language model (LLM) prompts against an array of input data. Modern LLMs offer an enormous amount of leverage if you "teach the bot to fish" — i.e. simply prompt it with both a "system prompt" (which typically doesn't change often) and a dynamic input, which is often application state, search results, recent activity, user profile data, etc. Existing playgrounds and prompt management systems often lack the rigor and flexibility required for this dynamic approach — and as…

    2023 · github.com

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