Prompt engineering tools help create, optimize, and manage prompts for AI language models. These platforms provide features for developing effective prompts, testing their performance, and maintaining consistency across different use cases. They are essential for getting the best results from AI models.
33 verified AI-first sites in Prompts.
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Browser extension that adds a curated, community-rated prompt library to ChatGPT and Claude. Template packs for SEO, marketing, coding, and support, plus custom prompts, GPTs, and team workspaces.
Pricing: Free tier; paid Solo and Team plans on site.
Marketplace for buying and selling prompts for ChatGPT, Midjourney, Nano Banana, FLUX, and other generative models. Creator storefronts with previews, plus custom prompt-engineering commissions.
Pricing: Free to browse; prompts priced individually by creators.
Prompt management, evaluation, and observability platform for LLM apps. Version prompts in a visual registry, run evals against datasets, and trace requests in production so non-engineers can iterate safely.
Pricing: Free tier; paid team and enterprise plans on site.
Searchable library of millions of prompts for AI image and video models including Midjourney, Stable Diffusion, FLUX, Nano Banana, Veo, and Sora. Community galleries, in-app generation, and a prompt-engineering Academy.
Pricing: Free to browse; paid Pro plans on site.
Prompt manager for saving and organizing ChatGPT and Midjourney prompts in folders with fill-in variables. Includes a Chrome extension for use inside ChatGPT and a browsable feed of trending community prompts.
Pricing: Free; see site for paid options.
Community marketplace for AI prompts, image prompts, and automations across ChatGPT, Claude, Gemini, and Midjourney. Browse by topic, save to a personal library, and sell prompts as a creator.
Pricing: Free to browse; paid prompts and plans on site.
Platform for creating, organizing, and enhancing prompts to improve AI interactions. Includes prompt library management, AI-powered prompt enhancement, and community sharing features.
Pricing: Free tier with unlimited prompts, Enterprise plan available for organizations
Fill-in-the-blank prompt templates and agent skills that produce expert results without prompt tinkering. Run the same prompt across OpenAI, Claude, Gemini, Grok, and other models side by side.
Pricing: Free sign-up; paid plans on site.
Personal prompt and context library that stores reusable blocks such as frameworks, mental models, and strategy templates. Clone community blocks from a gallery and reuse them across AI tools.
Pricing: Free tier; paid plans on site.
Team-focused prompt management platform for marketing and GTM teams. Features centralized prompt repository, quality scoring, prompt variables, and cross-platform accessibility via browser extension. Includes built-in prompt quality improver and team-wide consistency tools.
Pricing: Free plan available, paid plans start at $29/month
Prompt generator that turns a rough idea into a structured, model-ready prompt tuned for Claude, ChatGPT, Gemini, or Grok. Adds role, task, and constraints automatically, with a saved library and templates.
Pricing: Free: 25 prompts/month; paid plans on site.
Community store of prompts and AI characters for ChatGPT-style models. Browse trending prompts and bots by category, chat with them in the web client, and publish your own with leaderboards and bounties.
Pricing: Free plan; paid memberships on site.
Prompt library with 7,100+ engineered prompts for ChatGPT, Claude, Gemini, and Grok, plus custom GPTs, automation templates, and guides. Organized across 18 categories for marketing, business, and creative work.
Pricing: One-time lifetime access; see site for pricing.
Stanford open-source framework for programming LM pipelines instead of hand-writing prompts. Declarative signatures and modules are compiled by optimizers such as MIPROv2 and GEPA into better prompts and fine-tuned weights.
Pricing: Open source; free on GitHub and PyPI.
AI prompt management platform for teams. Git-based versioning, community library, prompt discovery and testing, deployment tools. Used by WSJ, Shopify, Stanford, Adobe, Visa, Accenture. Public and private prompt hosting.
Pricing: Free tier. Paid plans available.
Chrome extension for prompt management across ChatGPT, Claude, Gemini, and Midjourney. Save, organize, and share prompts with folders, tags, and custom variables. Team collaboration features. 2,000+ users, 4.8/5 rating.
Pricing: Free. Team $5/user/month. Business $10/user/month.
Goal-based prompt generator that turns a described outcome into a structured prompt with role, context, constraints, and output format. Works across ChatGPT, Claude, Gemini, and Midjourney, with a saved library and NEO assistant.
Pricing: Free tier; paid plans on site.
IDE-style workspace for engineering LLM prompts with measurement and comparison across models. Supports systematic iteration, evaluation metrics, and prompt variants so teams can refine instructions before shipping to production.
Pricing: Free tier; paid plans for advanced use; see site for current pricing.
Prompt library and marketplace for saving, organizing, and reusing prompts. Keep a personal library, fork community templates, and publish public prompts as a creator.
Pricing: Free individual use; team pricing on site.
Prompt marketplace for discovering, buying, and selling verified prompts across major text, image, video, audio, and 3D AI models. Focuses on creator storefronts, prompt discovery, and monetization workflows for prompt engineers and AI creators.
Pricing: Free to browse with paid prompt purchases and creator selling options.
Prompt database and tooling hub featuring curated prompt collections, prompt optimization utilities, and AI workflow helpers for multiple language and image models. Designed for users who want a single place to discover prompts and improve prompt performance.
Pricing: Free and paid plans available, with premium access to expanded tools and usage.
Prompt marketplace for trading prompts and AI workflows with community ratings and quality review mechanisms. Emphasizes curated discovery, governance, and creator monetization for prompt-focused AI users.
Pricing: Free to explore with paid prompt purchases and creator submission options.
Large free prompt library with categorized packs for content, design, productivity, coding, and growth workflows. Ready-to-use prompt systems for ChatGPT, Claude, Midjourney, and similar tools without building from scratch.
Pricing: Free access with optional paid plans.
Business prompt library and AI execution infrastructure with 20,000+ assets across 13 functions and 30+ industries. Governance workflows, version control, approval trails, and adoption analytics for teams scaling ChatGPT, Claude, Gemini, and Perplexity use.
Pricing: Free library browse; paid team and enterprise plans.
Prompt workspace and marketplace for creating, organizing, forking, and selling AI prompts. Personal library with version control and team collaboration plus community marketplace with ratings and creator monetization.
Pricing: Free workspace; marketplace purchases vary.
Community prompt library formerly Awesome ChatGPT Prompts. Discover, collect, and share prompts for ChatGPT, Claude, Gemini, and more; free and open source with optional self-host for organizations.
Pricing: Free and open source.
AI prompt generator that turns plain-English goals into structured expert prompts for ChatGPT, Claude, Gemini, Midjourney, and other models. Free generator focused on reusable prompt quality rather than a marketplace.
Pricing: Free generator; see site for any paid plans.
DAIR.AI open guide to prompting techniques, papers, and examples across chat and completion models. Covers zero-shot, few-shot, chain-of-thought, RAG-oriented prompting, and risk topics. Canonical free educational reference for learning prompt engineering.
Pricing: Free.
Prompt engineering workbench for versioning, testing, and shipping production prompts and Agent Skills. Multi-provider playground with BYOK economics, in-editor critique and rewrite, Behavioral Eval suites, and Humanloop `.prompt` import. REST API and SDK for teams replacing sunset Humanloop workflows.
Pricing: Free tier (250 AI calls/mo). Solo: $49/month. Team: $99/seat/month (3-15 seats). Enterprise: contact.
Web UI to test and compare prompts across OpenAI, Claude, Gemini, DeepSeek, and more side-by-side. Tracks cost and latency without a CLI-first eval stack.
Pricing: Free tier; paid plans on promptster.dev.
Open-source visual programming environment for prompt engineering. Compare prompts and models side-by-side, run parametrized tests, and evaluate robustness beyond anecdotal examples—in the browser or via pip install.
Pricing: Open source; free web playground at chainforge.ai/play.
Programming language for LLM interaction from ETH Zurich's SRI Lab. Write prompts with constraints, typed variables, and control flow so generation stays structured and portable across model backends.
Pricing: Open source; see LMQL docs and GitHub.
Public prompt-engineering curriculum with 60+ modules, translated into nine languages. Free lessons from fundamentals through agents, RAG, and applied workflows, plus certifications and team plans.
Pricing: Free courses; paid certifications and team plans on site.