Guru vs Tettra
Knowledge suggestions inside your tools versus a simple internal wiki.
Verdict
Guru surfaces answers inside Slack and the browser, and enforces verification cycles. Tettra is a cheaper, simpler wiki that gets a small team documented quickly.
Choose Guru if
You want answers pushed to people where they already work.
Choose Tettra if
You want a low-cost, low-maintenance wiki.
Consider LemPlates if
Your knowledge needs to become steps someone ticks off, not pages someone searches.