🔥 The #1 tool for simulating AI conversations

Simulate AI Conversations based on your System Prompts

⚡️ Optimize and Validate your Conversational System Prompts quickly with thousands of real customer responses.

Start Simulations 25% OFF

Get 100 free credits to start.

All the leading AI providers

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Unlimited Customer Behaviors

Customer behaviors from angry customers to interested ones, technical users to casual inquirers.

Run simulations
in bulk

Generate and Review hundreds of AI conversations to identify patterns and edge cases quickly.

Evaluate tons of
results

Evaluate conversations with detailed metrics and get actionable insights to improve your prompts.

Share results with
your team or clients

Collaborate with your team by sharing test results and insights to improve prompt performance together.

Generate Multiple AI Conversations With Just One Click 💬

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How It Works.

Spoiler: It's easy.

1

Input Your Instructions

Enter your system prompt and define the customer personas you want to test with.

2

Generate Conversations

Our AI will simulate multiple conversations using different customer behaviors and scenarios.

3

Evaluate Results

Review the generated conversations and analytics to optimize your prompt performance.

What our clients say about PromptKing

"We reduced prompt engineering time by 60% using PromptKing's simulation feature. Now we can identify edge cases before they become problems in production."

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Sarah Johnson

AI Product Manager

"The batch testing feature saved us from a major issue. We discovered our system prompt had a vulnerability when faced with specific user behaviors that we hadn't considered."

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Michael Chen

Prompt Engineer

"PromptKing's analytics helped us identify patterns in how different customer personas interact with our AI. We've improved our prompt success rate by 42% after just two weeks."

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Emily Rodriguez

AI Research Lead

"Before PromptKing, we were manually testing prompts. Now we simulate thousands of conversations overnight and identify problematic scenarios automatically. It's transformed our workflow."

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David Kim

CTO, AI Solutions

"The range of user personas that PromptKing can simulate is impressive. We've found edge cases with 'difficult' customers that would have been a nightmare to discover in production."

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James Wilson

AI Operations Manager

"Being able to share simulation results with stakeholders has been a game-changer. Now our non-technical team members can understand why certain prompt changes are necessary."

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Sophie Martin

Lead Developer

Simple, Credit-Based Pricing

Pay only for what you use - transparent pricing for AI conversation simulations

Starter Plan

€37

/mo €49

Billed annually €444

25% discount

1,000 Credits Included Monthly

  • 1,000 credits monthly
  • All AI models available
  • Up to 10 conversation turns
  • Export results (XLSX, CSV, JSON)
  • Email support

100 free credits • No credit card required

Most Popular

Professional Plan

€112

/mo €149

Billed annually €1,344

25% discount

3,500 Credits Included Monthly

  • 3,500 credits monthly
  • All AI models available
  • Up to 15 conversation turns
  • Export results (XLSX, CSV, JSON)
  • Conversation analytics & insights
  • Priority support

Estimated Credits per Conversation

Based on a typical conversation example: 50k tokens total (40k input tokens, 10k output tokens)

• Gemini 1.5 Flash ~1 credit/conversation
• Gemini 2.0 Flash ~2 credits/conversation
• GPT-4o Mini ~2 credits/conversation
• Claude 3.5 Haiku ~13 credits/conversation
• Gemini 1.5 Pro ~19 credits/conversation
• GPT-4o ~37 credits/conversation
• Claude 4/3.7 Sonnet ~50 credits/conversation

Example with 3,500 credits: You could run approximately 3,500 conversations with Gemini Flash or about 182 conversations with Gemini Pro, based on the example conversation length above

Need more? Add credits at €0.06 each for Professional plan

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Frequently Asked Questions

Find answers to common questions about PromptKing