TailorKit
The SDK for AI-customizable SaaS.
TailorKit lets SaaS companies support AI-built customer customizations safely: sandboxed code, native UI, and backend primitives for data, functions, and integrations.
Example
A customer-built app inside an existing CRM
A user adds small apps to the product they already use. The CRM keeps its routes, data, auth, and design system; TailorKit gives the custom apps a safe place to run.
Demo
TailorKit vs iframe
The left pane runs app logic in a Web Worker but renders UI through the host app. The iframe pane is fully isolated, so every mount must load its own React app and UI bundle.
Why this matters
TailorKit apps can use your existing design system because only the app logic is sandboxed. The UI is proxied into the host React tree.
Iframes cannot directly use your React components. You ship and maintain a separate component package or bridge, then fetch it on mount.
Architecture
How it works
Apps run in an isolated sandbox. Their UI is serialized and rendered natively in the host. Server infrastructure — functions, databases, email, integrations — lives alongside the sandbox so apps can build real features without leaving your platform.
What we're building
The complete platform for extensible SaaS.
Customers want to add workflows, dashboards, automations, internal tools, and integrations that product teams will never prioritize. TailorKit lets SaaS companies expose that surface safely, without turning every extension into a slow iframe and webhook project.