Both tools are great for visual thinking. The difference is usually in how your team plans repeatedly, not in one-off diagramming sessions.
Fast hand-drawn sketching and familiar collaborative canvas behavior make it a favorite for ideation sessions.
tldraw gives a polished canvas experience and flexible interactions, especially for teams prioritizing custom canvas flows.
If your bottleneck is repeating architecture and product planning diagrams, template-first planning in Zenvias can help teams reuse proven structures with less setup overhead.