Ceyu is two things that usually come as separate subscriptions: an infinite whiteboard for visual work, and a planning suite for the work around it. They share one project, so the plan and the material it describes never drift apart.
Whiteboard is the canvas. Reference images, animation clips, multi-page PDFs and 3D models sit on one surface next to frames, sticky notes, shapes and connectors. It is where a look is worked out.
Flowtask is the planning side: projects, tasks, dependencies, Gantt charts, capacity, tracked hours and expenses. It is where the work is committed to and paid for.
The join between them is the point. Any object on a board can be sent to Flowtask as a task, and a task carries a reference back to the frame it came from. Nobody has to keep a second tool in sync by hand.
Which plan gives you what
Basic and Pro upwards include both modules. Plus deliberately includes only one — pick the whiteboard or the planning side — which is why it is cheaper. The full breakdown is on the pricing page.
Ceyu writes to your own disk first and reads from it first. The application is fully usable with no connection: you can create, edit, import and export while offline, and nothing is queued behind a spinner waiting for a server.
Cloud sync is something you switch on, not something you opt out of. When it is on, board content is encrypted on your device before it is uploaded, using a key that never leaves your devices. What sits on the server is ciphertext.
An organisation admin can go further and set a workspace-wide local-only policy, which disables cloud sync for everyone rather than trusting each person to leave it off. Studios working under NDA usually want that. See Storage, sync & encryption.
A board created on one is openable on the others. The desktop applications add the things a browser cannot do well: direct file-system access, clipboard watching and keeping the window above your other software.