> ## Documentation Index
> Fetch the complete documentation index at: https://docs.corbado.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Choose an SDK

> Choose Corbado Observe for authentication telemetry or Corbado Connect for passkey integration, on web, iOS or Android.

Choose the integration for your product and platform. For **Observe on web**, start with Autocapture and the lightweight loader supplied for your enterprise project through the Management Console. Use SDK methods when you need custom events.

| Product             | Purpose                                       | Web                                       | iOS                        | Android                         |
| ------------------- | --------------------------------------------- | ----------------------------------------- | -------------------------- | ------------------------------- |
| **Corbado Observe** | Measure authentication journeys               | [Web integration](/sdks/observe/web)      | [Swift](/sdks/observe/ios) | [Kotlin](/sdks/observe/android) |
| **Corbado Connect** | Add passkeys to your existing identity system | [JavaScript and React](/sdks/connect/web) | [Swift](/sdks/connect/ios) | [Kotlin](/sdks/connect/android) |

Authentication implemented natively on iOS or Android uses the corresponding Observe SDK. Web-based login components can use [Autocapture](/corbado-observe/get-started/autocapture).

Connect SDKs handle passkey enrollment, login and management. Your existing identity system continues to own accounts and application sessions.

## Server-side integrations

Use the [Observe API](/api-reference/observe/overview) to query journeys, download exports, handle per-user data requests or send server-side events. Use the [Connect Backend API](/api-reference/connect/overview) to create Connect tokens and verify passkey login results. Server API keys belong on your backend.