Flawless

Flawless is an execution engine designed for durable computation, ensuring that your code runs to completion even amidst hardware or software failures. It is particularly advantageous for developers aiming to create complex user interfaces and maintain persistent state without relying heavily on databases. This tool allows the modeling of persistent state using just code and local variables, simplifying the expression of complex behaviors within applications.

Workflows in Flawless are written as regular Rust functions, which are then compiled to WebAssembly and executed in a deterministic environment. This setup requires explicit handling of nondeterministic operations, such as HTTP requests or random number generation, which are logged to persist their effects. If a workflow is interrupted, it can be re-executed to reach the same state without re-performing the side effects, minimizing the amount of data that needs to be persisted.

The deterministic nature of Flawless makes the system fully observable, allowing developers to analyze the exact execution path of any workflow, whether finished or still running. This transparency eliminates the issue of hard-to-reproduce bugs. By offloading the burden of state persistence, Flawless ensures that business logic runs to completion, even after server restarts for maintenance, seamlessly continuing from where it left off.

Developers interested in early access to Flawless can join the private alpha waitlist, while companies can reach out directly to tailor the tool to their specific needs.