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Milkie
What it is
Milkie is a free paywall SDK for monetizing Next.js apps. Developers use its PaywallGate component to restrict an entire section or selected components, so a page can include both free and premium content. Its metered option can give visitors a limited amount of free access each month. For content requiring sign-in but not a subscription, the README describes a separate AuthGate component. Milkie uses Stripe: users go to Stripe's hosted checkout to subscribe, and webhooks update subscription status so access can change in real time. The maker says Milkie is open source and MIT licensed. It works with NextAuth, Clerk, Lucia, Supabase, and other authentication providers. Developers can customize the paywall interface, messaging, and styling. Listed protections include callback URL validation, idempotency keys, PII sanitization, webhook signature verification, and email normalization. Setup involves creating three API routes for subscription status, checkout, and Stripe webhooks. Multi-tenancy, a developer dashboard, webhook relay, and multiple subscription tiers are listed as roadmap items.
For and against
For
- PaywallGate can restrict sections or individual components.
- Metered access can allow limited free use each month.
- Supports NextAuth, Clerk, Lucia, and Supabase.
- Open source under the MIT license.
Against
- Requires three API routes for its setup.
- Uses Stripe hosted checkout for subscriptions.
- One-time payments are not supported.
- Several listed capabilities remain roadmap items.
The verdict
Milkie provides configurable access gates for Next.js content, with Stripe handling subscriptions and webhooks updating access status. Developers should account for its three-route setup and note that several features are still on the roadmap.
Who it suits
Milkie is for developers building Next.js apps who want subscription, metered, or sign-in gates for content.
Plans and prices
Milkie
Open source · MIT licensed
Read 4 Oct 2026 · milkie.dev
On the record
- Authentication gating
- The README describes an AuthGate component for content that requires sign-in without a subscription.github.com · read 4 Oct 2026
- Authentication integrations
- The maker's GitHub README says Milkie works with NextAuth, Clerk, Lucia, Supabase, and other auth providers.github.com · read 4 Oct 2026
- Backend setup
- The quick start instructs developers to create three API routes for subscription status, checkout, and Stripe webhooks.github.com · read 4 Oct 2026
- Checkout
- Users are redirected to Stripe's hosted checkout page.milkie.dev · read 4 Oct 2026
- Component gating
- It can mix free and premium content on the same page.milkie.dev · read 4 Oct 2026
- Customization
- The README describes customizable paywall interfaces, messaging, and styling.github.com · read 4 Oct 2026
- Integration
- Developers protect pages, sections, or individual components with the PaywallGate component.milkie.dev · read 4 Oct 2026
- Layout gating
- It can protect entire sections at the layout level.milkie.dev · read 4 Oct 2026
- Metered access
- Its metered paywall example gives users limited free access per month.milkie.dev · read 4 Oct 2026
- Open source
- Milkie states that it is open source and MIT licensed.milkie.dev · read 4 Oct 2026
- Product
- Milkie is a drop-in paywall SDK for monetizing Next.js apps.milkie.dev · read 4 Oct 2026
- Project status
- The README lists multi-tenancy support, a developer dashboard, a webhook relay service, and multiple subscription tiers as roadmap items.github.com · read 4 Oct 2026
- Security
- The README lists callback URL validation, idempotency keys, PII sanitization, Stripe webhook signature verification, and email normalization as built-in protections.github.com · read 4 Oct 2026
- Subscription updates
- Webhooks update subscription status in real time for immediate access.milkie.dev · read 4 Oct 2026
