⚙️ Prompt Optimizers

Rewrite, score and improve existing prompts so models follow instructions more reliably.

Prompt Optimizer (open source) ★

Open Source

Popular open-source prompt optimizer you can use online or self-host.

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DSPy

Open Source

Framework for programming — not hand-writing — prompts, with automatic optimizers.

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Prompt Builder

Freemium

Generate, optimize and keep a history of prompts for major chat models.

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PrompTessor

Freemium

Analyze, score and optimize prompts, and manage them in one place.

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PromptHub Enhancers

Freemium

Prompt enhancers built on current best practices for each model provider.

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Optimizer vs generator

A generator starts from an idea; an optimizer starts from a prompt you already have and makes it clearer, more specific or better structured. Some optimizers are one-click rewriters, others run your prompt against test cases and keep the version that scores best.