📘 Overview of Thesys
👉 Summary
The rise of AI agents has exposed a major limitation: these systems communicate almost exclusively through plain text, even when data deserves a richer visual presentation. Thesys addresses this directly with C1, its Generative UI API. This technology allows developers to build AI agents that respond with real user interfaces — tables, charts, forms — rather than simple strings, fundamentally transforming the user experience of conversational applications.
💡 What is Thesys?
C1 by Thesys is an LLM API endpoint compatible with the OpenAI standard, designed to return structured UI components instead of text. When an agent uses C1, its responses are automatically transformed into React components rendered via the official SDK. The tool connects to external data via standard tool calls — databases, documents, REST APIs — ensuring interfaces are always powered by fresh, relevant data. A no-code Agent Builder allows teams to prototype agents visually.
🧩 Key features
C1 provides several key capabilities. Dynamic UI component generation includes interactive forms, data tables, analytical charts, and complex layouts produced in real time. The OpenAI-compatible endpoint enables fast migration from existing LLM integrations. The C1 React SDK simplifies client-side rendering of generated components. The C1 Artifacts API enables the creation of full slides and reports embedded in applications. The no-code Agent Builder allows creating and testing agents visually. Finally, the platform works with all major LLMs on the market.
🚀 Use cases
Thesys applies to many scenarios. Internal analytics tools can display dashboards generated dynamically based on user questions. AI CRMs can present enriched customer profiles in response to sales team queries. Educational platforms can generate interactive exercises on the fly. Reporting tools can automatically create presentations from raw data, dramatically reducing preparation time.
🤝 Benefits
Thesys's primary benefit is dramatically improving the user experience of AI applications: instead of reading a paragraph of text, users interact with data presented visually. For developers, integration is minimal thanks to OpenAI compatibility. The pay-as-you-go model avoids high fixed costs during startup phases, and the 100 free artifact pages per month allow moderate usage at no cost.
💰 Pricing
Thesys offers an Essentials plan at $0 with $10 in credits included at sign-up, no credit card required. The C1 Artifacts API provides 100 free pages per month, then $0.01 per page operation. Billing is entirely usage-based with no mandatory monthly subscription. An Enterprise plan with private deployment, enterprise SLA, SOC2/GDPR/ISO 27001 compliance, and a dedicated solutions engineer is available on request.
📌 Conclusion
Thesys is a promising building block for developers who want to evolve their AI agents toward rich conversational interfaces. Its accessible freemium onboarding, universal LLM compatibility, and React SDK make it a compelling option for any project looking to move beyond the text-only chatbot model.
