Comparison
SuperDoc is very good at what it set out to do: Word-grade DOCX fidelity in the browser. Stesura deliberately makes the opposite trade — we support DOCX import and export and minimise round-trip losses, but we refused to chain our document model to Word's XML. What you get in exchange is a model that is easier to assemble, interact with, and customise.
In short
Perfect round-tripping vs. a clean, extensible model.
SuperDoc shines on Word fidelity: DOCX in, DOCX out, losslessly. That comes with trade-offs — a schema carrying a lot of Word XML, a feature set narrower than the format it preserves, and, as we understand it, less room for custom nodes and renderers.
We optimised for the other end: a clean schema, flexibility, and extensibility, with DOCX as a format we translate rather than the format we think in. If round-tripping outranks everything else, pick SuperDoc. If you want the more advanced processor you can actually extend, pick us.
SuperDoc is a browser-based document editor whose defining goal is Microsoft Word compatibility: DOCX is treated as the native format, and round-tripping documents through Word with minimal drift is the core promise. That focus makes it a strong choice when your users' world is Word files. The flip side of binding the model to OOXML is that the editor inherits Word's structural constraints — custom document semantics, programmatic assembly, and schema-level extension all have to fit inside what Word's XML can express.
Best suited for
SuperDoc's strongest suit — DOCX (OOXML) is effectively its native document model. Stesura imports and exports DOCX and works hard to minimise losses, but deliberately does not mirror OOXML internally.
This is the strategic fork in the road. Binding to OOXML buys fidelity; decoupling from it buys a model that is easier to assemble, validate, and extend programmatically.
Both render true paginated pages in the browser.
Stesura exposes the full ProseMirror schema system; anything you add participates in validation, collaboration, and export. A Word-native model constrains what custom structure can exist, because everything must survive as OOXML.
SuperDoc is CRDT-based; Stesura is server-authoritative, on infrastructure you host.
Stesura ships tab autocomplete, document chat with tools, and text actions; you bring your own model endpoint.
SuperDoc has an open-source core (AGPL) with commercial licensing. Stesura is commercial.
If your requirement is “a Word document goes in, gets edited, and comes out with as little drift as possible, forever”, SuperDoc's approach — adopting OOXML as the internal model — is the right tool, and we'll tell you so.
We took a different strategic decision. Stesura's model is a clean ProseMirror schema designed for programmatic assembly, validation, and extension: generate documents from data, add your own node types, enforce structure, and interact with content through a typed API. DOCX stays a first-class import/export format whose losses we actively minimise — but it is a format we translate, not the format we think in. Products that treat documents as structured data, not as Word files, are who we built this for.
Choose SuperDoc when
Choose Stesura when
This comparison is based on publicly available information and reflects our honest understanding of SuperDoc. If something is out of date or inaccurate, we'd genuinely like to fix it — email us at info@innovars.eu.