Blog | Betty Blocks

Introducing a Wasm-based Action Builder by Betty Blocks: Where code power meets low-code speed

Written by Lisanne Steenis | 7/8/25 8:49 AM

Not enough code developers. Even more demand. Your backlog keeps growing, and the need for openness, control, and flexibility is more pressing than ever. Sound familiar?

Across industries, enterprise development teams are stretched thin. The demand for complex applications is skyrocketing, but engineering capacity can't keep up. Business-critical logic is often locked inside code silos, and legacy systems continue to slow innovation.

At Betty Blocks, we believe there's a better way. Introducing Betty Blocks Open.

Betty Blocks Open is our answer to the growing demand from enterprises for openness, control, and long-term flexibility in software development. While most low-code platforms rely on proprietary technology and introduce vendor lock-in, Betty Blocks Open takes a different path. It enables teams to build applications using Betty Blocks while retaining full ownership of their code and architecture. With Betty Blocks Open, the page builder outputs real React applications, and backend logic is powered by WebAssembly (Wasm), allowing developers to write in the language of their choice, not just JavaScript. 

This approach eliminates reliance on closed ecosystems, making the resulting applications portable and future-proof. For enterprise architects, senior IT leaders, and developers concerned about lock-in or hesitant about traditional low-code, Betty Blocks Open offers a way to reduce silos, lower total cost of ownership, and accelerate delivery, without compromising standards or developer autonomy.

 

A new chapter in low-code: powered by WebAssembly

A groundbreaking tool that bridges code flexibility with low-code speed is our Wasm-based Action Builder, using the power of WebAssembly (Wasm).

The Wasm-based Action Builder introduces WebAssembly (Wasm) to the heart of the Betty Blocks platform. With the Wasm-based Action Builder, code developers can build advanced, performance-critical components in any WebAssembly-supported language, such as Rust, C#, or Python. These components are then brought into the platform as visual, reusable building blocks. Low-code developers can configure and orchestrate them using familiar drag-and-drop tooling, without writing a single line of code.

This isn’t just another low-code feature. It’s a foundation for a truly open, collaborative development model, one where code and low-code finally meet in the same place.

One of the most powerful aspects of the Wasm-based Action Builder is how it transforms the dynamics between low-code and code teams. Traditionally, these groups work in separate tools, with different workflows and expectations. Betty Blocks breaks that barrier by creating a shared space where both profiles can contribute meaningfully, without compromise.

Whether your project starts as a low-code prototype or a code system integration, the Betty Blocks platform adapts to your needs. Add code logic to low-code apps, or extend code projects with low-code components. This flexibility opens the door to true collaboration, where visual builders and experienced engineers work side by side on the same application, in the same environment.

The result? Faster development, better software, and more unified teams. 

 

Ready to try it out?

The Wasm-based Action Builder is soon available behind a feature flag for early access. If you're ready to explore the next evolution of low-code development and bring your own code components into the mix, get in touch with me (lisanne@bettyblocks.com).