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Free to startAI artwork
Prompt Hunt creates AI artwork using its Chroma model and selectable styles. Users can combine style choices, save reusable templates and share them with others. Paid plans provide daily generation allowances that differ by model, making it a practical option for experimenting with a consistent visual direction.
Free tier unknownImages
Prompt Llama is a prompt library and comparison site for text-to-image models. It lets visitors gather high-quality prompts and test how the same prompt performs across many listed models, artists, and SREF codes.
Free to startAssistant
Prompt Octopus is a VS Code extension for side-by-side prompt engineering across 40+ LLMs. Developers highlight a prompt in code, pick models, compare responses, and optionally route calls through Prompt Octopus servers or their own API keys stored locally.
Free planAssistant
Prompt Selected is a free Chrome extension that runs custom ChatGPT prompts on text you select in the browser. It supports grammar fixes, summaries, translations, explanations, and other rewrite tasks using your own OpenAI API key.
Free planWriting
Prompt Sloth is a Chrome extension that improves rough drafts into structured prompts inside ChatGPT, Claude, Gemini, and 20+ AI tools. It adds one-click prompt optimization, template shortcuts, history, and optional Pro upgrades for unlimited improvements.
No free planAssistant
Prompt Studio is an alpha desktop workbench where coding agents can host custom tools with shared search, notifications, and themes. It targets teams using Claude Code, Codex, and OpenCode who need a common shell for agent-built utilities.
Free tier unknownAssistant
prompt.cafe is a lightweight web toy for mixing ingredient-style prompts to brainstorm app ideas quickly. Users combine stacks, styles, and project cues, then copy or build from generated prompt recipes.
Free tier unknownImages
Prompt.fun connects users with human prompt experts who help craft effective prompts for AI tools through real-time chat and file sharing. The platform also lets experienced prompt engineers apply to earn flexible hourly income while managing prompts on the service.
Free trialResearch
PromptArmor delivers continuous AI risk intelligence for third-party and internal AI assets. Security teams ingest vendor applications, enrich them with AI-specific risk scores, monitor scope and permission changes, and integrate findings with existing GRC workflows.
Free tier unknownAssistant
PromptBox is hosted at promptbox.ai as a client-rendered web application.
Free to startAssistant
Prompt Builder is an AI prompt engineering platform for generating, optimizing, and organizing prompts for ChatGPT, Claude, and Gemini. It offers a prompt library, improver workflows, and credit-based paid tiers for heavier usage.
Free tier unknownVoice
Promptcast.app is a pre-launch site showing a Launching Soon message with an email signup form. The page invites visitors to contact the team and subscribe for updates about the upcoming product.
Free planImages
Promptchan AI combines uncensored AI image generation, AI girlfriend chat, and video tools with a community gallery. Users start with daily free Gems, then can upgrade for higher quality, more styles and poses, AI video, and custom characters.
Free planAssistant
PromptDen is a community for discovering, sharing, and selling AI prompts across text, image, and video models. Members browse ChatGPT, Gemini, Claude, Midjourney, and video prompts, upload their own, and use a browser extension inside major chat apps.
Free planCode
Prompteams is a prompt management platform for teams to version, test, and deploy LLM prompts with playgrounds, criteria, repositories, and auto-generated APIs. It targets collaborative prompt iteration with real-time testing hooks.
Free tier unknownAssistant
Promptech runs hands-on AI adoption programs, workshops, and hackathons for organizations in New Zealand, Australia, and online worldwide. The company helps teams learn practical AI skills through facilitated sessions rather than a self-serve prompt SaaS.
Free planAssistant
PrompTessor is an AI prompt workspace for generating, analyzing, optimizing, refining, and reverse-engineering prompts across text, image, and video models. It adds libraries, history, multi-language support, and optional Pro access with higher monthly usage.
Free planCode
Prompteus is an AI orchestration platform for routing LLM requests, coordinating agents, and monitoring usage. Its Command product targets developers with caching, neuron-based metering, and team-ready Advanced plans for production workflows.
No free planVideo
PromptFlix lets groups cast themselves into Hollywood-style short films by uploading face photos and optional voice clips, picking genre templates, and generating shareable movies starring friends. Subscriptions grant monthly credits for generations.
Free planAssistant
PromptFolder is an AI prompt manager for saving, organizing, and running prompts for ChatGPT, Midjourney, and other tools. It offers a web editor, trending prompt browser, Chrome extension for ChatGPT, and free account signup.
Free planAssistant
Promptfoo provides open-source and enterprise tooling to evaluate prompts, models, and RAG pipelines while red-teaming LLM applications. Teams run scans locally or self-hosted, with optional cloud Enterprise features for monitoring, collaboration, and API access.
Free planAssistant
Prompt Hackers maintains a free library of ChatGPT, Claude, Gemini, Midjourney, and specialty prompts sorted by use case. Visitors copy vetted prompts, browse model-specific collections, and use generators such as the ChatGPT prompt builder without a paywall.
Free planImages
PromptHero is a prompt search and inspiration community for Midjourney, Stable Diffusion, Sora, FLUX, and other generative models. Creators publish prompts, explore trending media, and upgrade for private generations, credits, and faster queues.
Free planAssistant
Prompthub is a Dutch AI writing platform with prompts, templates, chat-based AI coworkers, and brand-voice tooling for marketing and ecommerce content. During its open beta the vendor offers only a free tier while gathering user feedback.
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