Tettra

Tettra is the company wiki and knowledge management platform Nelson Joyce and Andy Cook bootstrapped from Boston in 2015. Its core differentiator is deep Slack integration: instead of requiring employees to leave Slack to look up information, Tettra lets users ask questions directly in Slack (type a question, Tettra searches the wiki and returns the answer as a Slack message), request documentation from a colleague, and get notified when articles they're responsible for need updating. The company grew to $2M+ ARR with a small team by targeting 50-500 person companies whose biggest knowledge problem was tribal knowledge locked in employees' heads — not structured enough for Confluence, too distributed for Notion. Tettra's "verified answers" concept (subject matter experts mark answers as verified, so new employees know they can trust the information) addressed a common wiki problem: outdated information that erodes trust in the entire system. The Slack-first approach meant adoption came naturally in organizations where Slack was already the communication hub.