Build a Billing SaaS That Automates Revenue with AI

Create your billing SaaS in minutes with AI. Send invoices, manage subscriptions, collect payments, and recover failed charges without coding.

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Build your billing SaaS in four steps

Tell Emergent, plainly: your plans, usage metering, proration rules and dunning sequence.

Put Your Idea Into Words

Tell Emergent, plainly: your plans, usage metering, proration rules and dunning sequence.

From Prompt to Working billing SaaS

Stripe and your accounting tool connect, so revenue and invoices reconcile.

Refine by Prompting

Add a usage metric, change proration or extend the dunning sequence.

Launch and Share

Upgrade a customer mid cycle and check the proration is what you intended.

Emergent Key Features for Building a Billing SaaS

Billing is not invoicing. It is proration, mid cycle changes, usage that arrives late and revenue that has to be recognised correctly.

Mid Cycle Changes Calculated Correctly

Upgrades, downgrades and quantity changes prorate against the period consumed. This is the single most common source of billing disputes and manual credit notes.

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Usage Rated Even When It Arrives Late

Metered events are rated against the plan in force at the time they occurred, not when they were received, which matters whenever a customer changed plan that month.

Dunning That Recovers Rather Than Churns

Failed payments follow a retry and communication sequence tuned by failure reason, with access degrading in stages rather than a customer being cut off on a Sunday.

Entitlements Follow Billing State

What an account can do reflects what it currently pays for, including during trials, grace periods and after downgrade, so access and revenue never drift apart.

Revenue Recognised Separately from Cash

Recognised revenue, deferred balances and their release schedule are held apart from what was invoiced, which is what your accountant and any investor will ask for.

Every Change Explained on the Invoice

Prorated lines, credits and adjustments are itemised in plain terms, because an invoice a customer cannot understand becomes a support ticket every single time.

Billing SaaS Use Cases You Can Build in Minutes

Subscription Billing

Handle the Eleventh of the Month

Plans with prorated upgrades and downgrades, quantity changes mid cycle, trials converting cleanly, scheduled changes taking effect at renewal, and every adjustment itemised on the invoice.

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window.awbMockup = { subscriptionBilling: "Build a subscription billing engine handling plan upgrades and downgrades with correct proration against the period consumed, quantity changes mid cycle, trials converting cleanly, scheduled changes taking effect at renewal, and every adjustment itemised in plain language on the invoice.", usageBilling: "Build usage based billing where metered events are rated against the plan that was in force when the event occurred rather than when it was received, supporting tiered and volume pricing, showing customers their accruing spend before the invoice arrives, and applying caps where agreed.", paymentRecovery: "Build a dunning system where failed payments are retried on a schedule tuned to the decline reason, communication escalates while staying helpful, account access degrades in stages rather than stopping outright, and recovered revenue is reported against what was attempted.", revenueReporting: "Build a revenue reporting app showing recurring revenue movement split into new business, expansion, contraction and churn each month, deferred revenue balances with their release schedule, recognised revenue separated from invoiced, and the retention metrics an investor will check."};

Usage Billing

Meter It Without Surprising Anyone

Metered events rated against the plan in force when they occurred, tiered and volume pricing, spend visible to the customer before the invoice arrives, and caps or alerts where they ask for them.

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Payment Recovery

A Failed Card Should Not Mean a Lost Customer

Retries scheduled by failure reason, escalating communication that stays helpful, access degrading in stages rather than stopping, and recovered revenue reported against attempts.

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Revenue Reporting

The Numbers Finance Actually Needs

Recurring revenue movement split into new, expansion, contraction and churn, deferred balances with release schedules, recognised against invoiced, and the metrics an investor will check.

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Every integration your
SaaS needs from day one

Email and calendar

Inbox and calendar sync both ways, so every reply, meeting and no-show lands on the contact record without anyone logging it.

Messaging and support

Conversations from chat, WhatsApp and your helpdesk attach to the right contact, so sales and support see the same history.

Payments and billing

Invoices, subscriptions and payment status flow back into the deal, so revenue and pipeline stay in one place.

If it has an API, your CRM can connect to it.

Emergent builds the connection against the API itself, including internal tools your team made. No closed ecosystem, no approved-partner list, no waiting for a connector to ship.

Why choose Emergent?

Most tools give you a demo you have to rebuild. Emergent gives you a product that is ready to run.

ComparisonOther Tools
Built forDemos and MVPsProducts you keep growing
What you getFront end shell onlyFull stack, wired end to end
Backend and databaseSet it up yourselfBuilt and connected for you
CustomizationSurface level stylingDeep workflow control
Integrations and APIsManual glue workConnected from a prompt
Code ownershipLocked to the platformClean code you can export
Time to launchWeeks of patching and setupLive the same day

Pick the Pricing Plan That Works for You

Choose the plan that fits your building ambitions. From weekend projects to enterprise applications, we've got you covered.

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Build web & mobile apps
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Purchase extra credits as needed
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Frequently Asked Questions

Your Questions, Answered

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