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.
Not given
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
1006 agent catalog entries with step-through simulations
1032 prompt templates and engineering methods
Architecture diagrams and vibe coding pipelines
Agent builder generating prompt and architecture blueprint
Glossary of 100+ AI and agent terms
Moderated community for discussing agents and prompts
Prompt library with full source attribution
Learning guides on LLM foundations and agent fundamentals
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
Interactive simulations showing real agent loops before building
Completely free with no paid tier
No live model execution, only conceptual demonstrations
Curated by staff with moderation and full source attribution
Community submissions reviewed before appearing publicly
Hark
Vibe Code Pipeline