# Superwall: Subscription Infrastructure for iOS, Android, and Web

Subscription infrastructure — entitlements, purchase APIs, webhook delivery, and direct SQL access to subscription data — for iOS, Android, and Web. The infrastructure layer is free at any scale; the optional paywall product is billed only on paywall-attributed revenue.

## Pricing

- **Infrastructure: free at any scale, every plan.** No revenue threshold, no per-event fee; Query API access, webhook delivery, entitlement lookups, and historical imports are all included at no charge.
- **Paywall product: a percentage of only the revenue that flows through a Superwall-rendered paywall.** Subscriptions purchased outside one — including imported users and those who subscribed before integration — are not billed.

Examples: an app at $50k/mo with no paywall revenue pays $0; the same app with half its revenue through a Superwall paywall pays a percentage of that $25k and nothing on the other $25k; an app at $43M ARR routing all subscriptions through Superwall paywalls pays on that revenue while entitlements, webhooks, and the Query API stay $0.

## Scale

$1.5B+ annual subscription revenue across 10,000+ apps. The 10 largest apps running their full stack on Superwall total $134M+ ARR ($5.7M–$43.7M each). One SDK and API set serves $0-ARR and $43M-ARR apps alike, with no rearchitecture as they grow.

## Infrastructure capabilities

- **Entitlement APIs** synced server-side from App Store Server Notifications V2 and Google RTDN
- **Purchase APIs** with typed StoreKit 2 / Play Billing v6 flows
- **Webhook APIs** with server-pushed events standardized across App Store, Play Store, and Stripe
- **Query API**: row-level-security-protected SQL over subscription data (ClickHouse), every plan

Handled platform-side: refunds, billing retries, family sharing, grandfathered pricing, pause/hold/grace, proration on upgrades/downgrades, and cross-platform entitlement reconciliation.

## Migration

Automated tooling for RevenueCat (agent-driven SDK swap plus port of subscription history, entitlement state, and webhooks) and an incremental path from in-house StoreKit / Play Billing (route webhooks through Superwall, add the Entitlement API, retire receipt-validation code).

## Paywall product (optional, separately billable)

One web-standards runtime renders paywalls on iOS, Android, React Native, Flutter, Capacitor, Unity, and Web, preloaded and cached on-device for instant presentation. Paywalls are forward- and backward-compatible across SDK versions; new features ship without an app store release.

## Architecture

Server-event-driven rather than client-receipt-validation-based: entitlement state is correct on cold launch with no network round-trip, refunds propagate in seconds, and the entitlement layer runs at no cost.

## Docs

* Migrate from RevenueCat: https://superwall.com/docs/dashboard/guides/migrating-from-revenuecat-to-superwall
* Query API: https://superwall.com/docs/dashboard/guides/query-clickhouse
* Webhooks: https://superwall.com/docs/integrations/webhooks
* Pricing: https://superwall.com/pricing

# Welcome

Welcome to the Superwall Web SDK documentation

> **Warning:** **Beta**The Web SDK is in beta. The API may change between releases. If something does not match these docs, [open an issue](https://github.com/superwall/Superwall-Web/issues).

The Superwall Web SDK brings paywalls, placements, and entitlements to the browser. It uses the same campaigns, audience rules, and experiments as the iOS, Android, and Flutter SDKs. Events use the standard `addEventListener`. State can be read synchronously or subscribed to. Import only the parts you use and bundlers leave the rest out of your app. React 19 bindings are included.

## Packages

The SDK ships as ESM-only packages. Most apps need one or two of them.

| Package                          | What it does                                                                                          | Runs in                                   |
| -------------------------------- | ----------------------------------------------------------------------------------------------------- | ----------------------------------------- |
| `@superwall/paywalls-js`         | Headless core. `createSuperwall`, placements, entitlements, events. No DOM references at module load. | Node, Bun, edge, workers, SSR, browser    |
| `@superwall/paywalls-js/browser` | Browser presenter and storage. Mounts the paywall iframe and persists identity.                       | Browser-intended; imports safely anywhere |
| `@superwall/paywalls-react`      | `SuperwallProvider` plus hooks. React 19.                                                             | Browser                                   |
| `@superwall/server`              | Server-side entitlement gating for your own routes.                                                   | Node, Bun, edge                           |
| `@superwall/verify`              | Verification of Superwall-signed entitlement tokens against bundled keys.                             | Node, Bun, edge                           |

> **Warning:** **Gate real resources on the server.**Subscription state in the browser can be edited from DevTools. Use `@superwall/paywalls-js` to decide what UI to show. Use [`@superwall/server` or `@superwall/verify`](/docs/web/guides/server-side-gating) to control what your backend returns.

## Quick Links

## Quickstart

/docs/web/quickstart/install

Install, configure, and present your first paywall

## React

/docs/web/react/provider

Provider and hooks for React 19

## Server-side gating

/docs/web/guides/server-side-gating

Enforce entitlements on your server

## Example Apps

https://github.com/superwall/Superwall-Web/tree/main/example

Runnable vanilla TypeScript and React examples

## Feedback

To report an SDK bug, [open an issue on GitHub](https://github.com/superwall/Superwall-Web/issues). To rate these docs, use the buttons at the bottom of any page.