Non-invasive neurotech startups, like Neurovalens, are gaining investor interest due to lower costs and risks compared to invasive brain implant technologies like Neuralink. Neurovalens has raised $30.4 million to develop wearable brain-stimulating devices targeting mental health and metabolic conditions, aiming for FDA approval and market expansion. The neurotech market, currently valued at $13-14 billion, is projected to grow to $40 billion by 2030, driven by the potential of non-invasive treatments to reach more patients.