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Canvas by Thesys

Quickly design AI interactions with a visual canvas

www.thesys.dev

Product Development User Experience Design AI Conversations Flow Mapping Visual Design Tools

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Key Topics

Generative UI OpenUI Cloud C1 API

Project Review

FAQ 3

Intro

Thesys provides a Generative UI foundation for teams building AI products that go beyond text. The platform positions OpenUI Cloud (formerly the C1 API) as a production-ready API for AI-native products and documents the ability to stream production-ready UI components directly from LLM responses. The site references developer examples for Node.js and Python, API keys and documentation, and an Agent Builder for creating AI-driven interfaces.

Key Features

UI primitives for dashboards, forms, charts, slides, reports and cards.
OpenUI Cloud (formerly C1 API): a production-focused API with docs and developer examples (Node.js, Python).
Streaming of production-ready UI components from LLM responses to speed integration.
Agent Builder to assemble AI-driven interfaces or agents.
Pricing notes: select models are offered free with “zero LLM costs,” limited to roughly 100 calls/day (~3K/month). Annual billing can save up to 20% and there is a limited-time pricing offer.
Privacy note: data submitted to free models may be used for training, which is a consideration for sensitive data.

Who this is for

This is practical infrastructure for engineering and product teams building AI-native interfaces — teams that need UI components generated from models rather than plain text. It is aimed at groups evaluating a production-ready API (OpenUI Cloud/C1 API) and teams using the Agent Builder. Review the free-tier limits (~100 calls/day) and the training use notice for free models before routing sensitive data through free endpoints. The public material does not include detailed per-tier paid pricing, SLAs, security certifications, or complete data-retention and deletion policies, so plan to request those details if they are material to procurement or compliance decisions.

Frequently Asked Questions

What does Thesys/OpenUI Cloud provide?

Thesys provides a Generative UI foundation with support for dashboards, forms, charts, slides, reports and cards. OpenUI Cloud (formerly the C1 API) is described as a production-ready API that can stream UI components directly from LLM responses and includes developer examples for Node.js and Python, plus an Agent Builder.

Is there a free tier and what are its limits?

Yes. The site lists select models available for free with “zero LLM costs,” but free usage is limited to approximately 100 calls per day (about 3,000 per month). There is also a limited-time pricing offer and an annual billing option that can save up to 20%.

Are there privacy or data-use considerations?

The documentation notes that data submitted to free models may be used for training. That represents a potential privacy risk for sensitive data; the public materials do not fully document data-retention, deletion policies, or paid-tier privacy practices, so you should confirm those details before sending sensitive information.

Thesys OpenUI Cloud (C1 API) — Generative UI for AI Products

Thesys provides a Generative UI foundation. OpenUI Cloud (formerly C1 API) streams production-ready UI components from LLMs, offers an Agent Builder, and a free model tier with limits.

Editorial Notice

This is an independent third-party profile of Canvas by Thesys and is not officially affiliated with the project.

This review is based on publicly available website information and may contain errors or outdated details. Please verify critical details on the official website.

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