Your data tells
the whole story.
CRUD applications capture what happened, but they often lose the reason why. Alvyn records the full narrative of your business logic as an immutable stream of events. Stop settling for static records; start building on the truth of your history.
Experience the Paradigm Shift
Click the library actions below to see why Traditional CRUD loses data and how Alvyn builds an AI-ready domain journey narrative.
Live Domain Simulator
Simulate a member book-borrowing journey. Compare Traditional CRUD against Alvyn Event Sourcing.
Database is empty.
Start the simulation by clicking "Borrow Book".
No events emitted yet.
Alvyn is ready to stream immutable timeline facts.
AI System Intelligence
Model Capacity MultiplierClick an action above to begin simulating real member library activity.
The database shouldn't
dictate your domain.
Traditional CRUD architectures collapse complex business logic into generic operations. A single “Update” might represent upgrading a subscription, correcting a billing error, or adjusting a delivery window. When these are flattened into a table row, the context is lost forever.
In an era where data is the ultimate competitive advantage, discarding meaning is a strategic risk. You can always derive state from events, but you can never reconstruct the original intent from a modified row.
Alvyn ensures that every business action is preserved with its full context, creating a high-fidelity record that serves your users today and your AI models tomorrow.
Code that speaks
your business language.
When your codebase uses the same vocabulary as your domain experts, complexity disappears. Instead of generic functions, Alvyn encourages verbs that mean something: onboardCustomer, approveClaim, or suspendAccess.
Naming isn't just about style; it's about system integrity. By capturing the language of the business directly in your events, you eliminate the translation layer that causes most software failures.
Event Sourcing with Alvyn turns your audit log into a living document that any stakeholder can understand, ensuring your architecture stays aligned with reality as you scale.
Event streams as simple as standard DB queries.
No complex external message brokers or distributed consensus clusters. Alvyn runs directly inside your existing PostgreSQL database with total compile-time safety.
Engineers as domain experts
Define event payloads explicitly using standard TypeScript types. Your codebase represents business reality without translation-loss.
1// Define type-safe event payload contracts2export type CartEvents = {3 CartCreated: { cartId: string; userId: string };4 ItemAdded: { sku: string; price: number; name: string };5 CouponApplied: { code: string; discount: number };6 CheckoutCompleted: { paymentId: string; totalPaid: number };7};Everything you need for enterprise-grade streams.
Preserve Business Intent
Every state transition is stored as an immutable, append-only historical fact. Never lose the 'why' behind a change again.
Native PostgreSQL
No heavy Kafka or EventStoreDB setups. Uses native Postgres advisory locks, optimistic concurrency, and Outbox patterns in your current DB.
GDPR Crypto-Shredding
Built-in AES-256-GCM event encryption. Instantly shred a cryptographic tenant key to make PII irrecoverable—even in historical logs.
Schema Evolution
Real-world business logic shifts. Out-of-the-box support for Event Upcasting and version mappings ensures history evolves gracefully.
Type-Safe Aggregates
Strict TypeScript compilation guarantees. Event mapping inference and strict aggregate state definitions.
High-Fidelity History
An absolute record of every business decision and user action. The foundational core for auditable systems and AI-ready datasets.
“The event log is not a side effect.
It is your system.”
Stop treating your data like a draft. Every action in your system is a permanent piece of your business history. By recording the truth of how your application evolves, you build a foundation that empowers your logic, your auditors, and your AI future.