21st.dev
Build and deploy AI solutions with 21st.dev developer tools
Recommended for
- Solo / Indie
- Idea-Stage
- Pre-Seed
- Seed
21st.dev is a cutting-edge platform in the ai-and-llms category, offering a freemium model for developers to leverage machine-learning capabilities. The platform features an open AI agent registry, allowing users to discover and integrate ready-to-use agent configurations for various applications. With 21st.dev, developers can copy and implement React UI components, streamlining their development process. The Agents SDK provides a comprehensive toolkit for building custom AI-powered products, making 21st.dev an essential resource for businesses and individuals alike. By utilizing 21st.dev's suite of developer tools, users can accelerate their AI solution deployment and drive innovation in the agentic internet space.
SSIE
Stage Fit Recommendations
Following data shows why 21st.dev is recommended for listed teams. The Fit Score represents the percentage fit of 21st.dev to each company stages, as calculated by the SSIE.
Stage
Fit Score
Fit Reasons
Solo / Indie
$0–$2,000 MRR
77- Entry pricing sized for this stage
- Free tier available, no upfront cost
- Open-source codebase, independently reviewable
- Multiple support channels (chat, email)
Idea-Stage
$0
78- Pre-built third-party integrations
Pre-Seed
$0–$10k MRR
71- Free tier available, no upfront cost
Seed
$10k–$100k MRR
59- Pre-built third-party integrations
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