Looking through the code:
1. They removed the MIT License and added AGPL.
2. It's not a fork, they purposefully copied the code and did a find/replace to swap out Zerox for their name.
3. There is no attribution or mention of the original library.
4. They are trying to market this as a competitive product.
If you inspect the source code, it's a verbatim copy. They literally just renamed the `ZeroxOutput` to `DocumindOutput` [2][3]. I recognize that plenty of people are using Zerox within commercial products, but to copy to copy the code and pitch it as your own open source product is pretty fraudulent. Especially slapping a copyleft license on it.
[0] https://news.ycombinator.com/item?id=42171311
[1] https://github.com/getomni-ai/zerox
[2] https://github.com/DocumindHQ/documind/blob/main/core/src/types.ts#L25
[3] https://github.com/getomni-ai/zerox/blob/main/node-zerox/src/types.ts#L35