Each major shift in computing has come from a better way to interact with machines.

Hardware gave us the foundation. Operating systems made machines programmable. Graphical interfaces made them usable.

Today's interfaces weren't built for intelligence. They can't adapt, anticipate, or understand real context.

The next leap isn't just about better models. It's about a new kind of interface that works the way you think.

AI is advancing fast, but the interface hasn't kept up.

The most powerful models are still stuck behind static UIs and prompt boxes, while real work lives across tabs, tools, and passing thoughts.

Every context switch breaks focus. Every restart slows you down.

The browser has become a bottleneck. UI adds friction. Apps forget everything about your workflow. AI tools are still being launched in silos — locked in chats, dashboards, or closed ecosystems.

We think that's backwards.

Dex is the intelligence layer for AI-native work.

Our first product is a browser-native copilot that embeds directly into your workflows. It sees what you do, understands your intent, and helps you move with speed and clarity — without leaving your tools.

Dex works with you, not around you. It enhances the tools you already use and becomes a bridge between thought and action.

ThirdLayer is where research meets product design.

We're an applied research and product lab backed by Y Combinator and leading investors in deep tech, HCI, and consumer tech.

Our team comes from — or passed on — OpenAI, FAANG, top quant firms, and elite academic labs and PhD programs. We're advised by research and design mentors from MIT Media Lab, Sakana AI, DeepMind, and Eleven Labs.

If you're exploring adjacent questions in HCI, tool calling, multimodal context capture, or secure agent architectures, we'd love to connect.

📩 hiring@thirdlayer.inc