The ledger engine for modern financial infrastructure
Double-entry accounting, multi-currency support, real-time reporting, and tamper-evident audit trails. Deploy in minutes via REST API.
Everything you need
A complete double-entry ledger engine, purpose-built for platforms that move money.
Double-Entry Engine
Strict balance enforcement at the transaction level. Every posting must balance.
Multi-Currency
Unified registry for fiat (ISO 4217), crypto (ISO 24165), stablecoins, and commodities.
Real-Time Reports
Trial balance, P&L, and balance sheet generated in milliseconds.
Tamper-Evident Audit
SHA-256 hash chain across all journal entries. Detect any tampering instantly.
API-First Design
RESTful API with OpenAPI spec. Integrate in hours, not months.
Config-Driven Rules
Add new transaction types through API configuration. Zero code changes.
How it works
Get from zero to production-grade accounting in three steps.
Create your account
Sign up free, generate an API key, and connect your platform in minutes.
Post financial events
Send transaction data via REST API. GL System handles the double-entry accounting.
Query & report
Generate trial balances, P&L, and balance sheets. Export in CSV, PDF, or Excel.
See it in action
Post a financial event with a single API call. GL System creates the journal entries, updates balances, and extends the hash chain automatically.
- Idempotent event ingestion with unique event keys
- Automatic double-entry posting from config-driven rules
- Real-time balance updates across all affected accounts
- SHA-256 hash chain extended with every journal entry
curl -X POST https://api.glsystem.io/api/v2/gl/events \
-H "Authorization: Bearer glk_live_..." \
-H "Content-Type: application/json" \
-d '{
"eventKey": "INV-2026-001",
"eventType": "ORDER_PAYMENT",
"amount": "1250.00",
"currencyCode": "USD",
"variables": {
"entity_account": "ACCOUNTS_RECEIVABLE"
}
}'Why GL System?
Compare GL System against the alternatives.
| Feature | GL System | Legacy ERPs | Custom Built | Spreadsheets |
|---|---|---|---|---|
| API-first | ||||
| Multi-currency | ||||
| Real-time balances | ||||
| Hash chain audit | ||||
| Config-driven rules | ||||
| Time to integrate | Hours | Months | Weeks | N/A |
| Rebuild from events |
Simple, transparent pricing
Start free and scale as you grow. No hidden fees.
Growth
- 500,000 events/month
- 600 req/min API rate limit
- Priority support
- Webhook delivery
Enterprise
- Unlimited events/month
- 6,000 req/min API rate limit
- Dedicated SLA
- Webhook delivery
- Custom data retention
Ready to modernize your ledger?
Join teams building the next generation of financial infrastructure. Get started in minutes with our free tier.