Turn user intent into revenue—automatically

Fourbyfour detects when a user is about to convert, drop, or expand—and triggers the right action to maximize revenue.

Recover failed payments. Convert more trials. Expand high-intent users.

Start your first workflowSee it in action
Developer-first

One API call. Revenue workflows start running.

app.ts
fourbyfour.startWorkflow({
  userId: "user_123",
  intent: "PAYMENT_FAILED",
  signals: {
    plan: "pro",
    mrr: 49,
    attempts: 2
  }
})
Workflow running

That's it.

You send signals. We decide and act.

  • When to act
  • What action to take
  • Which channel to use
  • What performs best

No dashboards required. No manual flows.

A decision engine between your product and your users

Simple workflow, powerful results

1

You send an intent

Trial started. Payment failed. Usage dropped.

2

We evaluate signals

Behavior, value, timing, history.

3

We decide the next best action

Email, in-app, offer, retry, delay.

4

We execute and learn

Outcomes improve over time.

More conversions. Less churn. Higher LTV.

Pre-built workflows

Built-in workflows for your most important revenue moments

Recover failed payments

Adaptive retries based on user value and failure patterns.

Escalates only when needed. Reduces unnecessary churn.

Convert trial users

Triggers nudges based on real usage—not arbitrary timelines.

Avoids spam. Improves conversion timing.

Expand high-intent users

Detects upgrade signals early.

Surfaces the right offer at the right moment.

Prevent churn

Identifies drop-off patterns.

Intervenes before users disengage.

Start any workflow with one call

Not rules. Not campaigns. Decisions.

The difference is everything

Most tools

  • require manual workflows
  • treat users the same
  • rely on guesswork

Fourbyfour

  • adapts per user
  • updates continuously
  • improves outcomes automatically
Static rules→
Dynamic decisions

You stay in control

Define the what. We handle the how.

You define

Your business logic

  • intents

    What triggers a workflow

  • signals

    Data that informs decisions

  • workflows

    Actions to take

We handle

Powered by AI

  • decisioning

    Which action to take

  • timing

    When to act

  • execution

    Running the workflow

  • optimization

    Improving over time

No black boxes. Just better decisions.

If every user should get the same flow, you don't need Fourbyfour.

But if timing, behavior, and intent matter—you do.

Interactive playground

See revenue decisions in action—before you integrate

Simulate real usersWatch workflows adaptSee what would happen in production
PAYMENT_FAILED

Payment Recovery

Recover failed payments.

SUBSCRIPTION_CANCELLED

Win-back Campaign

Re-engage cancelled subscribers.

SUBSCRIPTION_DOWNGRADED

Downgrade Follow-up

Follow up with users who downgraded.

SUBSCRIPTION_ENDING

Renewal Reminder

Remind users before subscription ends.

Try the playground

Built for product teams that ship fast

Developer experience that doesn't get in the way

SDK-first
Event-driven
Type-safe signals
Idempotent workflows
Works with your existing stack

Start simple. Scale as needed.

Get started in minutes

Start your first revenue workflow

One integration. Immediate impact.

Get started
Free to startNo credit card requiredSetup in under 5 minutes

Fourbyfour is a revenue decision engine for PLG products

Not analytics. Not CRM. Not marketing automation.