Outline

Outline is a US-incorporated open-source-style knowledge-base and wiki product, operated by **General Outline, Inc.** in **New York City** and originally founded by **Tom Moor**. The product positions itself as a fast, beautiful, real-time-collaborative knowledge base for teams — feature-comparable to Notion and Confluence but with a leaner UX and an open-source codebase on GitHub (outline/outline). The product targets fast-growing software teams, has built a strong following in the developer-tools community, and supports 20+ languages with RTL support, dark mode, Slack and Figma integrations. For an EU-sovereignty audit Outline is the canonical "open-source license ≠ EU-controlled" case alongside Cal.com. The licence is the **Business Source License (BSL)** — open-source in spirit but with a competitor-hosting prohibition that excludes Outline from the OSI-approved open-source definition. The BSL contract specifies that the codebase reverts to **Apache 2.0** four years after publication date, so v0.62.0 (and earlier) became Apache 2.0 in March 2026. This means **buyers can fully self-host the licence-converted Apache 2.0 versions on EU infrastructure** (Hetzner, OVHcloud, Scaleway, IONOS, STACKIT) with no licence-restriction concerns and achieve effective 5/5 / none CLOUD Act posture for that path. The **hosted Outline cloud, by contrast, is operated from the US by General Outline, Inc., which is `us_owned` and subject to US extraterritorial law by default — `direct` CLOUD Act exposure**. Score 3/5 in this directory reflects exactly that split: the self-host path on EU infrastructure is procurement-grade-friendly, but the managed cloud should not be the first choice for EU buyers when category alternatives like **HumHub (DE, AGPLv3, German GmbH)**, **Nuclino (DE)**, **Cryptpad (FR, E2E-encrypted)**, **OnlyOffice (LV)**, **BookStack (UK, MIT-licensed self-host)**, or **Wiki.js (open source self-host)** offer structurally cleaner EU-controlled ownership. Best fit: EU developer teams who specifically want Outline's UX and are willing to self-host on EU infrastructure under the converted Apache 2.0 versions.