Comparison
Seylo vs Fabric
Both keep the work you make with AI, and both hand it back to Claude, ChatGPT and Cursor. They disagree about one thing: what an assistant is allowed to settle on its own.
Choose Fabric if you want one app instead of five
Fabric is the larger product and it is not close. An infinite canvas, meeting and voice notes, tasks and Kanban, publishing to clients, annotations, a handwriting scanner. Apps for iOS, Android, desktop and a CLI. Search by colour and by image, not only by words. Several AI models under one subscription.
If what you want is a workspace that replaces a pile of other tools, that is their argument, and it is a good one. Seylo does not compete with it. Seylo has no canvas, no meetings, no mobile app, and is built by one person.
Choose Seylo if your project has facts that must not drift
Fabric’s assistant searches what you saved, summarises it, and shows you where it came from. Ask it to compare five documents and it will point out where they disagree. That is a reading tool, and a good one.
What it does not keep is a single answer. Ask what the look of the campaign is and you get what the documents say, including the two directions you abandoned in March, because nothing ever demoted them.
Seylo keeps one current value per fact, and the database enforces it rather than the habit of whoever typed last. A new value does not delete the old one; it retires it. Every AI you connect is handed the current one, and told it outranks anything else in the project.
Nobody types any of this. There is no form to keep up to date, the thing everyone abandons by week three. You approve a piece of work, Seylo offers to record its conclusion, and the fact goes on reading that document afterwards. Edit the decision and what your AI is told changes with it.
An assistant can propose what is true. It cannot decide it.
Fabric lets you require confirmation before an agent takes an action you consider sensitive, such as deleting a file or moving content. The gate is on the action, you configure it, and it is about objects.
Seylo gates something else, and does not ask you to turn it on. When an assistant records a value that contradicts one the project already holds, nothing changes. You get this:
Colour grade
In force
Natural light, muted. No HDR.
Claude suggested
High contrast, crushed blacks
Until you answer, the muted grade is still what every tool is handed, including the assistant that raised it. Which is the difference between noticing on the next image and noticing on the fortieth.
A price is the obvious example and the least interesting one. The facts that drift are a character’s hair, the voice a brand writes in, the framework you decided against in week two: the things nobody writes down because everybody present already knows them. Only a contradiction stops to ask; anything the project did not already know is simply recorded.
Side by side
| Fabric | Seylo | |
|---|---|---|
| What it is | A workspace that replaces several apps | A control layer for what your AI treats as true |
| Current value of a fact | No such concept: sources are cited, not ranked | One per label, enforced by the database |
| Contradictions | Highlighted when you ask, while reading | Caught when written, and routed to you |
| What an approval gate covers | Actions on objects: delete, move. You configure it | Contradicting a recorded fact. Always on |
| History of a decision | Documents keep versions | Values supersede each other in a chain you can read |
| Breadth | Canvas, meetings, tasks, publishing, mobile, CLI | Projects, assets, state, browser extension, MCP |
Try it against your own project
Connect Claude, record something your project treats as settled, then have it say the opposite. That is the whole difference, and it takes about a minute to see.
Fabric is a trademark of its owner and is not affiliated with Seylo. Everything above describes Fabric as documented on fabric.so on 25 August 2026, and quotes their own wording where it matters. Pricing is deliberately left out: theirs changes and ours is on the pricing section. If anything here has gone out of date, tell us and it gets corrected.