Slack—Slack contributed multiple open source projects including Nebula, PanModal, and open-sourced its CLI

Jan 1, 2020

Slack has published numerous open source projects on GitHub including Nebula (scalable overlay networking tool), PanModal (iOS presentation API), and Kaldb (observability data storage). The company actively contributes to core frameworks including Electron, Webpack, and Vitess. In 2024, Slack open-sourced its CLI tool. Slack also sponsors Kotlin Lang Slack and contributes to projects like Anvil and Insetter.

Scoring Impact

Topic	Direction	Relevance	Contribution
Open Source	+toward	primary	+1.00
Overall incident score =			+0.590

Score = avg(topic contributions) × significance (medium ×1) × confidence (0.59)

Evidence (1 signal)

Confirms product_decision Jan 1, 2020 verified

Slack engineering blog documented open source strategy and contributions to Electron, Webpack, Vitess

Slack's engineering blog detailed the company's open source strategy, including publishing projects like Nebula and contributing to core frameworks. The Slack CLI was open-sourced in 2024.

Slack Engineering,GitHub

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