Ledger API
Event-sourcing billing API with immutable audit trail
Ledger API provides an event-sourced billing backend where every charge, credit, refund, and adjustment is stored as an immutable event. Reconstruct any account balance at any point in time, generate auditor-ready financial reports, and integrate with Stripe or any payment gateway via clean webhooks.
MRR
$14,320
+12% this month
Active
487
+23 this month
Churn
1.8%
-0.4% this month
$14K/mo
Verified revenue
73%
Choose annual
98.7%
Uptime SLA
<2min
Setup time
The Problem
Sound familiar?
Billing bugs that silently miscalculate charges are invisible until a customer complains
Auditors require a traceable history of every financial change — rebuilding this from mutable records is expensive
Custom billing logic (usage-based, tiered, seat-based) is underpowered in off-the-shelf payment tools
The Solution
Ledger API fixes this.
Immutable Event Log
Every financial event (charge, credit, discount, refund, upgrade, downgrade) is appended to an immutable ledger. The current balance is always derivable from the event sequence.
Temporal Queries
Query any account's balance or transaction history as of any past timestamp. Invaluable for dispute resolution, audits, and debugging billing anomalies.
Flexible Billing Models
Supports flat-rate, per-seat, usage-metered, tiered, pay-as-you-go, and hybrid models. Rules are defined as JSON schemas, not code.
How It Works
Set up in under 2 minutes. No complex configuration.
Immutable Event Log
Every financial event (charge, credit, discount, refund, upgrade, downgrade) is appended to an immutable ledger. The current balance is always derivable from the event sequence.
Temporal Queries
Query any account's balance or transaction history as of any past timestamp. Invaluable for dispute resolution, audits, and debugging billing anomalies.
Flexible Billing Models
Supports flat-rate, per-seat, usage-metered, tiered, pay-as-you-go, and hybrid models. Rules are defined as JSON schemas, not code.
Gateway Agnostic
Integrates with Stripe, Braintree, PayPal, and custom payment processors. Ledger API is the billing logic layer — you keep your existing payment infrastructure.
Why not the alternatives?
Same result. A fraction of the price.
| Product | Price | Core feature |
|---|---|---|
| Ledger API | $25/mo | Event-sourcing billing API with immutable audit trail |
| Enterprise tool | $149/mo | Overkill for most teams |
| DIY approach | 40+ hrs dev | High maintenance burden |
Integrates with your stack
Simple, Transparent Pricing
No per-user fees. No hidden costs. Cancel anytime.
Developer
- 10,000 events/month
- All billing models
- Stripe integration
- 12-month event retention
Business
- 100,000 events/month
- All billing models
- Multi-gateway support
- Unlimited event retention
- Audit export (CSV/PDF)
- Webhook retries
- Priority support
Frequently Asked Questions
Is this a replacement for Stripe?
No. Ledger API is the billing logic and audit layer that sits above your payment gateway. Stripe (or your current processor) still handles actual card transactions.
How does event sourcing prevent billing errors?
Because the balance is always recomputed from events, there is no "out of sync" state. Any discrepancy is immediately detectable by replaying the event stream.
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