Reviewers provide very little direct user feedback, but the founder-side comments are clear on one point: ProseMirror is widely respected as core editor infrastructure. The maker of
Tiptap, the strongest and most specific founder source here, explicitly calls it the building block that made Tiptap possible and says they continue to support its open-source work. Beyond that, the rest of the founder reviews are positive but offer no concrete detail, so the available evidence mainly supports a narrow summary of strong ecosystem trust rather than specific praise or criticism.
Timestripe
Missive
Simpla
Webflow
Simpla
We've used ProseMirror for our components at simpla.io since it was in alpha, because it was the only framework that was low-level and flexible enough to achieve what we wanted (semantic output, inline editing, custom doc model). Since then it's only gotten more powerful and stable. In my opinion it is the best richtext editing framework currently available, without exception.
Pros:Powerful, low-level API; Not tied to a context (React, etc); Very flexible and modular; Rock solid output;
Cons:Bit of a steep learning curve, docs could be better