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Rendel vs CopilotKit: a hosted in-app assistant, or an open-source copilot framework

CopilotKit facts read on 12 October 2026 from CopilotKit’s own pages, rechecked every 90 days

Choose CopilotKit if your team wants an open-source framework to build its own in-app copilot on React-family stacks, with your own agent. Choose Rendel if you want the assistant, its confirmation and audit, and a console for your team, ready on Flutter and the web.

Side by side

What it is
RendelA hosted SDK, API and console
CopilotKitAn open-source framework that connects your app to AI agents (MIT) (github.com)
Platforms
RendelFlutter apps on iOS and Android, and any website. Native iOS, native Android and React Native are planned, not shipped.
CopilotKitReact, Angular, Vue, React Native, Slack and Microsoft Teams (github.com)
Generative UI
RendelAnswers are pages of your app's own native components (cards, forms, charts, maps, receipts), in your brand.
CopilotKitAgents render UI in the client; controlled, declarative and open-ended patterns (github.com)
Approving actions
RendelCalls your API as the signed-in user. Anything that changes data waits on a confirmation card our server builds.
CopilotKitHuman-in-the-loop hooks for approval and edit gates, wired by the developer (docs.copilotkit.ai)
Pricing
RendelPilot free; Starter $199 and Growth $799 a month with usage credit included; Enterprise by contract.
CopilotKitDeveloper free; Pro $39 a month; Team $100 a seat a month; Enterprise custom (copilotkit.ai)

Where CopilotKit is the better choice

  • Open source under MIT, so you can read and change everything.
  • Bring your own agent framework (AG-UI protocol).
  • Wider web framework coverage: Angular and Vue as well as React.

Where Rendel fits

  • Your app is in Flutter.
  • You want confirmation cards, an action log and governance included, not built.
  • Your product team should run the assistant from a console, without code changes.

Sources

  • CopilotKit is an open-source framework that connects apps to AI agents, under the MIT License. github.com
  • It supports React, Angular, Vue, React Native, Slack and Microsoft Teams. github.com
  • Hosted plans run from free to $100 a seat a month, Enterprise custom. copilotkit.ai

Questions

Is Rendel open source?

No. The Flutter SDK's source is public under MIT, but the service behind it is hosted.

Book a demo or try the demo apps.