Born from the community spirit of Spring I/O, Wasm I/O has become the annual pulse check for the WebAssembly (Wasm) community. The conference, hosted every year in beautiful Barcelona, is the place where the theoretical meets the practical, and the experimental meets the enterprise.
Wasm I/O 2026: The details
When: March 19–20, 2026
- The vibe: A broad balance from the edge to the browser, and from language creators to platform engineers
Sponsored by Akamai
We are thrilled to announce that Akamai is officially a sponsor of Wasm I/O 2026. Our team will be on the ground, sharing how Spin provides the best-in-class developer experience for building WebAssembly applications that can be executed on different runtimes. We’ll also share how we are using Wasm to power high-performance, secure computing across the world’s most distributed network.
Why 2026 is an important year for Wasm
This year is shaping up to be pivotal to WebAssembly — outside the browser, in particular. With the imminent release of WASIp3, WASI and the Component Model are gaining powerful new abilities, such as first-class support for asynchronous programming across languages and enhanced composability.
Later this year, the Component Model will gain support for the final big missing piece: The ability to run applications using multiple threads.
2026 is also the year in which the community around the Component Model and WASI is shifting gears to work toward a 1.0 release of the Component Model to provide a stable platform for decades. Details of these plans are going to be broadly announced at Wasm I/O 2026.
Additionally, we’re now starting to realize some of the more novel advances described in the original Bytecode Alliance announcement. In Spin, we’re working on support for handling dependencies that fully isolates them from one another, mitigating the impact of both accidental mishandling and malicious extraction of sensitive data.
Why you should join us
Wasm I/O is unique because of its "unlikely collisions." It’s a place where a developer who builds graphics for the web might share a lunch table with an engineer who works on Wasm-powered robotics or a platform architect who runs a global CDN. This intersection is where the next big breakthrough often starts.
Whether you're looking to dive into the latest WASIp3 specs or want to see how global leaders are handling billions of requests using Wasm, this is the event for you.
🌴 Barcelona pro tip: The Calçotada
If you’re joining us in March, you are arriving at the tail end of one of Catalonia’s best culinary traditions: the Calçotada.
March is the prime time for calçots — long, sweet onions that are charred over open flames, wrapped in newspaper to steam, and served with a rich romesco sauce. It’s a messy, communal, and delicious experience that defines local life at this time of year.
Find a traditional masia (farmhouse restaurant) or a local bistro in the Gràcia district to try them before the season ends.
Ready to join us?
Ready to join the community? Grab your ticket and come say hi to the Akamai team in the expo hall.
No heavy Docker containers or local Kubernetes clusters are required.
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