Private beta · Join the waitlist

The authorization layer for monetized software

The authorization layer for monetized software

Your billing changed. Your access logic shouldn’t. One stable question. Kerne resolves the rest.

Your billing changed. Your access logic shouldn’t. One stable question. Kerne resolves the rest.

See the SDK flow

THE PROBLEM · ONE PRIMITIVE

Commercial rules leak into your code.

Commercial rules leak into your code.

Kerne resolves them behind one call.

Your product only asks: is this allowed?

Entitlements · Pro 2026.2 · 12 capabilities

Usage policy

1,842 of 2,000 credits · resets in 8 days

Maya Chen · Pro annual

Allowed · export_pdf

WHY NOT JUST STRIPE, CLERK, OR KINDE?

They solve adjacent layers. Kerne owns the access decision between them.

They solve adjacent layers. Kerne owns the access decision between them.

They solve adjacent layers. Kerne owns the access decision between them.

CAPABILITY

CAPABILITY

Kerne

Kerne

Stripe Entitlements

Stripe Entitlements

Clerk

Clerk

Kinde

Kinde

Usage accumulation

Usage accumulation

Real-time enforcement

Real-time enforcement

Per-customer overrides

Per-customer overrides

Auth-provider neutral

Auth-provider neutral

Payment-provider neutral

Payment-provider neutral

DATA INTEGRITY

No subscription lost.
Ever.

Sync your provider’s subscriptions anytime.

Kerne handles duplicates, out-of-order events, and late webhooks.

Webhook integrity

evt_92A1 · duplicate

STRIPE DELIVERS

Events arrive late, twice, or out of order.

Events arrive late, twice, or out of order.

incoming stream

invoice.paid · 10:42:08

customer.updated · 10:41:53

Docs

KERNE NORMALIZES

Deduplicate · event ID recorded

Order · stale state rejected

Reconcile · latest billing state

Commit · one canonical update

YOUR PRODUCT ONLY SEES

the

current

truth

Access preserved

A delayed webhook cannot revoke a paying customer’s access.

Identity that fits the stage you’re in.

Magic-link or password auth.

Custom registration. Simple sessions.

Open registration

Invite-only · Waitlist · Closed

Stripe

Polar

EU VAT handled

Billing you choose for tax and compliance.

Access stays portable across providers.

Grandfathering is the default, not a migration project.

A subscription pins its active pack at signup. Publishing Pro 2026.2 leaves customers on Pro 2025.4 until you explicitly move them.

Usage, credits, and customer exceptions.

Consume quotas atomically, grant one-shot credits or debits, and apply a specific override without rewriting the underlying entitlement model.

What Kerne owns in your stack today.

What Kerne owns in your stack today.

Identity. Entitlements. Usage. Exceptions. One place instead of four.

Identity that fits the stage you’re in.

Magic-link or password auth.

Custom registration. Simple sessions.

Open registration

Invite-only · Waitlist · Closed

Stripe

Polar

EU VAT handled

Billing you choose for tax and compliance.

Access stays portable across providers.

Grandfathering is the default, not a migration project.

A subscription pins its active pack at signup. Publishing Pro 2026.2 leaves customers on Pro 2025.4 until you explicitly move them.

Usage, credits, and customer exceptions.

Consume quotas atomically, grant one-shot credits or debits, and apply a specific override without rewriting the underlying entitlement model.

Identity that fits the stage you’re in.

Magic-link or password auth.

Custom registration. Simple sessions.

Open registration

Invite-only · Waitlist · Closed

Stripe

Polar

EU VAT handled

Billing you choose for tax and compliance.

Access stays portable across providers.

Pro 2026.2

2026.2

2025.4 preserved

Grandfathering is the default.

Change a plan without silently changing what existing customers paid for.

Versioning guide

1,842 / 2,000

No override

Usage, credits, and customer exceptions.

Consume atomically. Override when needed. No rewrite required.

PRIVATE BETA · AVAILABLE TODAY

Ship the commercial access layer your product needs now.

Ship the commercial access layer your product needs now.

Available today. User-scoped decisions. Versioned packs. Quotas. Overrides. Documented & ready in the SDK.

WHAT YOU CAN SHIP

Feature gates with allows() · Atomic quota consumption · Boolean, quota, and static entitlements · Versioned packs · Per-user overrides · Usage corrections

EXPLICITLY NOT YET

Organizations and team scopes · Custom roles and full RBAC · Overage charging · And way more to come…

Join Kerne private beta.

Join Kerne private beta.

Request access and help shape the production roadmap with the founding team.

Request access and help shape the production roadmap with the founding team.

Join the private beta

Private beta · Limited founder cohort

© 2026 Kerne · Authorization service