Free MIT core · Aurora Meter Pro from $99/mo per app

Aurora Meter

Real-time credits, quotas and usage billing for Phoenix, on the Stripe billing you already have.

Charging for LLM tokens? Sell prepaid credits that burn down as each call settles, with Stripe top-ups and auto-recharge when a balance runs low. Running B2B SaaS? Gate plans with quotas and usage limits, and report overage to Stripe Billing Meters. Count, gate, and bill on the BEAM: an ETS hot path that flushes to Postgres and adds up across every node in your cluster.

See pricing View the free core

Free MIT core · track/2 lib/my_app/reports.ex Live

# count usage: an ETS increment, flushed to Postgres
AuroraMeter.track(org, :ai_generations)

# read it back, live, for the UI
AuroraMeter.usage(org, :ai_generations)
#=> %{used: 7_420, limit: 10_000}

Usage this period

org_acme · plan :pro

AI generations 7,420 / 10,000

API calls 128,900 / 250,000

Exports 47 / 50

# gate + run + meter, atomically
AuroraMeter.with_quota(org, :ai_generations, fn ->
  generate_report()
end)

org_acme ai_generations ✓ 9,998 / 10,000
org_acme ai_generations ✓ 9,999 / 10,000
org_acme ai_generations ✓ 10,000 / 10,000
org_acme ai_generations ✕ {:error, :limit_exceeded}
org_acme upgrade_prompt → shown · plan :pro → :scale

Metered events

12:04:31 Acme Corp ai_generations +3
12:04:29 Globex api_calls +128
12:04:27 Initech exports +1
12:04:24 Umbrella ai_generations +7

stripe Billing Meters

Synced with Stripe

1,240,318

events reported this period

ai_generations ✓ meter_event
api_calls ✓ meter_event
exports ✓ meter_event

MRR

$19,072

▲ +11% this month

Metered revenue

$4,210

▲ +23% overage

Invoices paid

312

Stripe, this period

Metered usage by month

Feb

Mar

Apr

May

Jun

Jul

Invoice paid · Acme Corp · $412.00

ETS hot pathPersisted to PostgresCluster-wide totalsMIT core

Counting: In ETS
Flushed to Postgres: On your interval
Across your cluster: Totals converge
Core licence: MIT

Built on

Phoenix
Elixir
LVLiveView
PostgreSQL
Stripe
Tailwind

How it works

From `mix.exs` to billed in four steps.

The free core counts and gates, persists to Postgres and sums across nodes. Add Aurora Meter Pro when you want Stripe to charge for it.

01

Add the dependency

Pull in the free MIT core from Hex. Pro is a drop-in add-on when you need billing.
step 01
```
def deps do
  [
    {:aurora_meter, "~> 1.0"}
  ]
end
```

Declare your plans

A compile-time DSL, validated at compile time. Hard caps, metered overage, and boolean capabilities all live in one place.

step 02

defmodule MyApp.Plans do
  use AuroraMeter.Plans

  plan :free do
    limit :ai_calls, 100, :hard
  end

  plan :pro do
    metered :ai_calls, included: 10_000, unit_price: 1
    feature :priority_support, true
  end
end

Start it in your tree

One child. It validates config at boot and starts the metering runtime.

step 03

children = [
  MyApp.Repo,
  {Phoenix.PubSub, name: MyApp.PubSub},
  AuroraMeter,
  MyAppWeb.Endpoint
]

04

Count, gate and bill

Three calls. `track` counts, `with_quota` gates-runs-meters atomically, and the LiveView components render live usage. `org` is your tenant: any string or id for the customer, or your own struct via a small `AuroraMeter.Tenant` module.
step 04
```
# count usage
AuroraMeter.track(org, :ai_calls)

# gate + run + meter in one atomic step
AuroraMeter.with_quota(org, :ai_calls, fn ->
  generate_report()
end)
```

step 01 · Add the dependency

def deps do
  [
    {:aurora_meter, "~> 1.0"}
  ]
end

step 02 · Declare your plans

defmodule MyApp.Plans do
  use AuroraMeter.Plans

  plan :free do
    limit :ai_calls, 100, :hard
  end

  plan :pro do
    metered :ai_calls, included: 10_000, unit_price: 1
    feature :priority_support, true
  end
end

step 03 · Start it in your tree

children = [
  MyApp.Repo,
  {Phoenix.PubSub, name: MyApp.PubSub},
  AuroraMeter,
  MyAppWeb.Endpoint
]

step 04 · Count, gate and bill

# count usage
AuroraMeter.track(org, :ai_calls)

# gate + run + meter in one atomic step
AuroraMeter.with_quota(org, :ai_calls, fn ->
  generate_report()
end)

Build the whole thing, step by step Everything the core does Read the docs

Aurora Meter Pro

From counters to invoices.

The free core counts, gates and holds prepaid credit. Pro is the revenue and operations layer on top: prepaid credit sold through Stripe with top-ups and auto-recharge, metered usage reported to Stripe Billing Meters, Stripe billing sync, self-hosted LiveView dashboards showing balance and spend, historical rollups, quota alerts and reconciliation.

See everything in Pro Pricing

Prepaid credits: Stripe top-ups + auto-recharge
Metered usage → Stripe Billing Meters
Stripe Checkout + webhook sync
Subscription-aligned billing periods
Historical rollups + CSV export
Self-hosted LiveView dashboards
Quota alerts + reconciliation
Email support, 2 business days

Aurora Meter Free · MIT: $0 forever
Aurora Meter Pro per app: $99/mo or $990/yr
Aurora Meter Pro Unlimited any number of apps: $2490/yr · Pays for itself at 3 apps

14-day refund on your first invoice, no questions asked · cancel anytime · Licence terms · Terms

Choose your plan

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Then ship the rest of the product.

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$399

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$279

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$179

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PHX AI Document Starter

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Builder Pass · one payment

Every template, present and future, for life.

The whole catalogue plus everything we release next, with lifetime updates and commercial use on unlimited projects. Downloads land in your account instantly.

Lifetime access

$749

Template pricing

Free · MIT

Aurora UI, the component kit we build with.

15 accessible, themeable Phoenix LiveView component families with complete interaction states. Never behind an email gate.

$ {:aurora_ui, "~> 0.1"}

Explore the components GitHub

Start metering this afternoon.

The free core installs in one dependency. Pro starts with a 14-day trial and bills through Stripe when you are ready. Need the rest of the app too? Start from a template.

Start a 14-day free trial Browse templates

Real-time credits, quotas and usage billing for Phoenix, on the Stripe billing you already have.

From mix.exs to billed in four steps.

Add the dependency

Declare your plans

Start it in your tree

Count, gate and bill

From counters to invoices.

Then ship the rest of the product.

Aurora Commerce

Developer Portfolio

Phoenix Blog Template

PHX Data Agent Starter

PHX SaaS Starter

PHX AI Document Starter

Every template, present and future, for life.

Aurora UI, the component kit we build with.

Start metering this afternoon.

From `mix.exs` to billed in four steps.