Collaborative platform to build immersive roleplay worlds with AI characters
Stage
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Startup
Founded
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Based in
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Pricing model
Freemium
Freemium
Pricing
Free plan available. hark pro² at $20/month with 2× more usage. hark pro³ at $100/month with 10× more usage. All features available in all plans; upgrading increases usage capacity.
Free: $0/month with unlimited characters and messages using free AI models. Plus: $10/month including everything in Free, unlimited public and private worlds, $10 model credits monthly, more detailed personas, more slots, and priority support.
Key features
Persistent memory to tailor responses based on shared context
Computer use agent for browsing, research, and web tasks
End-to-end encryption for data security
Action Buttons for prioritized task completion
Email management and sorting
Flight booking and travel planning
Food ordering integration
Appointment booking and healthcare search
Expense auditing and savings recommendations
World editor with visual interface for characters, backstory, and locations
Characters know each other and develop memories
Auto-vector embedding for content retrieval in chat
Advanced prompt customization for system prompts and LLM parameters
GitHub-like collaboration with world forking and change proposals
What makes it different
Operates its own secure computer with full browser for independent task execution
End-to-end encryption vault for sensitive data protection
User approval required before performing sensitive actions
All features available across free and paid tiers
Prevents AI hallucinations through interconnected world lore and character context
Complete control over prompt engineering and AI behavior customization
Private roleplay data not used for AI model training
Hark
OpenRP