We used to be huge fans of Coda for internal documentation and shared customer documentation. When it first came out, it was competing with Google Docs, and it was just better on every single front. And to that end, it still is.
We mainly used it as more of a collaborative project manager mixed with knowledge base solution, to where we'd spin one up when beginning work with a new customer, and it'd be the sole place we'd communicate and document.
The friction point grew over time as documents increasingly felt separate from one another. Jumping between internal documentation and customer documentation was like moving in and out of folders in Google Drive, and quickly searching across all of this was just too much.
That and the team at Coda decided they were going to double-down more on the no-code and database functionality of Coda and less on the knowledge base/documentation side of things.
I must admit, they did an exceptional job at this—in terms of re-thinking Google Docs and turning it into something that's just better in all ways, they accomplished that and more. It's just also with that, they began strutting the line of an all-in-one tool, to which if you've read enough on the site, you'd see that this is a category we see poised with issues.