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19 tools for “Prompt Testing”

Promptfoo
Open-source CLI for testing prompts and red-teaming AI apps
FreemiumModels & APIsMade in United States
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PromptHubNew
Prompt versioning, testing and deployment for teams
Freemium · $12/moModels & APIs
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LangtailNew
Prompt management and testing for product teams
Freemium · $99/moModels & APIs
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PromptGroundNew
Prompt versioning, testing and one API key for many models
FreemiumModels & APIs
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PromptPointNew
Design, test and deploy prompts with automated testing
Freemium · $20/moModels & APIs
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Promptmetheus
Prompt engineering IDE for testing prompts across 150+ LLMs
FreemiumModels & APIs
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OptiMonk
AI agent that designs and runs website popups for online stores
Freemium · $29/moMarketingMade in Hungary
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Braintrust
Evaluation and observability platform for shipping reliable AI apps
Freemium · $249/moModels & APIsMade in United States
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LangWatchNew
Tracing, evals and testing for LLM agents in production
FreemiumModels & APIs
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UGCad AINew
Make creator-style video ads from a product link or prompt
Freemium · $29/moVideo
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PromptLayer
Prompt management and evals for teams where non-engineers edit prompts
Freemium · $49/moModels & APIsMade in United States
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Momentic
AI QA engineer that writes and repairs end-to-end tests
Freemium · $125/moCodingMade in United States
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AI Clothes Changer
Swap the outfit in a photo using a clothing reference or a text prompt
FreemiumImage
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Google AI Studio
Free playground and API keys for Google's Gemini and Gemma models
FreemiumModels & APIsMade in United States
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LangSmith
Tracing, evaluation and deployment platform for LLM agents
Freemium · $39/moModels & APIsMade in United States
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Mistral Studio
Mistral's developer platform for its open and commercial models
FreemiumModels & APIsMade in France
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Emergent
Agentic vibe-coding platform for web and mobile apps
Freemium · $20/moCoding1 views1 clicks to the website
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Giskard
Red teaming, evaluation and guardrails for LLM agents
FreemiumModels & APIsMade in France
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Cogent
AI study platform for flashcards, practice exams and file chat
FreemiumEducation
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