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Milkie

milkie.dev

Free plan Web
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Spec score 7.6 #15 of 30 in Paywall Software

What it is

Milkie is a paywall SDK for Next.js apps, provided free and licensed under MIT. Developers use its PaywallGate component to protect whole sections or selected components, so a page can contain both free and subscription-only material. A metered setup can grant visitors a limited amount of free access each month. For content that requires sign-in but not a subscription, Milkie describes an AuthGate component. It works with Stripe: users go to Stripe's hosted checkout, and webhooks update subscription status in real time. The maker's README lists support for NextAuth, Clerk, Lucia, Supabase, and other authentication providers, as well as customization of paywall interfaces, messages, and styling. Listed protections include callback URL validation, idempotency keys, PII sanitization, webhook signature verification, and email normalization. Setup calls for three API routes covering subscription status, checkout, and Stripe webhooks. Multi-tenancy, a developer dashboard, a webhook relay, and multiple subscription tiers are roadmap items.

Spec sheet

Product
Milkie is a drop-in paywall SDK for monetizing Next.js apps.Read 4 Oct 2026 · milkie.dev
Security
The README lists callback URL validation, idempotency keys, PII sanitization, Stripe webhook signature verification, and email normalization as built-in protections.Read 4 Oct 2026 · github.com
Authentication gating
The README describes an AuthGate component for content that requires sign-in without a subscription.Read 4 Oct 2026 · github.com
Authentication integrations
The maker's GitHub README says Milkie works with NextAuth, Clerk, Lucia, Supabase, and other auth providers.Read 4 Oct 2026 · github.com
Backend setup
The quick start instructs developers to create three API routes for subscription status, checkout, and Stripe webhooks.Read 4 Oct 2026 · github.com
Checkout
Users are redirected to Stripe's hosted checkout page.Read 4 Oct 2026 · milkie.dev
Component gating
It can mix free and premium content on the same page.Read 4 Oct 2026 · milkie.dev
Customization
The README describes customizable paywall interfaces, messaging, and styling.Read 4 Oct 2026 · github.com
Integration
Developers protect pages, sections, or individual components with the PaywallGate component.Read 4 Oct 2026 · milkie.dev
Layout gating
It can protect entire sections at the layout level.Read 4 Oct 2026 · milkie.dev
Metered access
Its metered paywall example gives users limited free access per month.Read 4 Oct 2026 · milkie.dev
Open source
Milkie states that it is open source and MIT licensed.Read 4 Oct 2026 · milkie.dev
Project status
The README lists multi-tenancy support, a developer dashboard, a webhook relay service, and multiple subscription tiers as roadmap items.Read 4 Oct 2026 · github.com
Subscription updates
Webhooks update subscription status in real time for immediate access.Read 4 Oct 2026 · milkie.dev

Plans and prices

Milkie Free Open source · MIT licensed Read 4 Oct 2026 · milkie.dev

Every Milkie plan and price →

Strong points and limits

Strong points

  • Free and MIT licensed.
  • Can gate layouts, sections, or individual components.
  • Metered setup can offer limited monthly free access.
  • Works with several listed authentication providers.
  • Lists protections for callbacks, PII, and webhooks.

Limits

  • Requires three API routes for setup.
  • One-time payments are not supported.
  • Multiple subscription tiers are listed as roadmap work.
  • Uses Stripe hosted checkout.

Who it suits

Milkie suits developers building Next.js apps that need subscription gates, metered access, or sign-in-only content. It is a web product and uses Stripe for payments.

Verdict

Milkie covers several paywall patterns and spells out its Stripe flow and security protections. Its roadmap items and three-route setup are worth weighing before integrating it.

Where Specifiction places it

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