Autumn

Billing layer on top of Stripe

Free tier + paidPayments & billinguseautumn.com

What it is

Open-source billing layer that sits between your app and Stripe. It moves pricing from code into config and handles subscription state, usage metering, credits, entitlements and upgrade or downgrade proration, returning Stripe Checkout URLs. Stripe remains the processor, so Autumn is not a merchant of record.

Why it earns a slot

Kills the worst part of a Stripe integration — webhook handling and feature gating — behind calls like check and track, so usage-based AI pricing takes an afternoon instead of a sprint.

Know before you commit

Not an MoR: Stripe fees and your own global tax obligations still apply on top. The hosted free tier stops around $8k processed per month and the next step is a steep $375/mo, though Apache-2.0 self-hosting is an escape hatch.

Getting started

npm i autumn-js

Field notes

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Pricing snapshot

Free to ~$8k/mo processed · $375/mo to $50k · self-host free (Apache-2.0)

Snapshots move fast — verify at checkout, and post a field note if it changed.

Drop into your Lovable chat

Evaluate Autumn (https://useautumn.com) for this project, then use it only if it fits what we are already building.
Context: Billing layer on top of Stripe. Open-source billing layer that sits between your app and Stripe. It moves pricing from code into config and handles subscription state, usage metering, credits, entitlements and upgrade or downgrade proration, returning Stripe Checkout URLs. Stripe remains the processor, so Autumn is not a merchant of record.
Reviewer notes (general, not written for this codebase): Kills the worst part of a Stripe integration — webhook handling and feature gating — behind calls like check and track, so usage-based AI pricing takes an afternoon instead of a sprint.
Watch out for: Not an MoR: Stripe fees and your own global tax obligations still apply on top. The hosted free tier stops around $8k processed per month and the next step is a steep $375/mo, though Apache-2.0 self-hosting is an escape hatch.
Pricing: Free to ~$8k/mo processed · $375/mo to $50k · self-host free (Apache-2.0)
Setup: npm i autumn-js
Rules: treat the notes above as background only. Do not assume a theme, style, layout or feature that is not already in this project — inspect the existing code first and ask me before changing visual direction.

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Neighbourhood

How Autumn sits against the rest of the atlas — swaps, companions and the tools builders actually save alongside it.