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I'm a little bit confused is it the opensource that searches also in jira, wiki, slack, ..? https://github.com/facebookincubator/glean ?

I'm also confused, the link you shared is more akin to a sourcegraph alternative; but the parent is talking as if it's an LLM.

I'm going to guess that there are to completely unrelated products that share a name.

glean.com and your link (glean.software).