ContextOS differs from Notion, Obsidian, Linear, Asana, and Todoist by focusing on one job: preserving project memory — sessions, decisions, resources, and next actions — so builders can resume work without reconstructing context.
ContextOS isn't trying to replace your task manager or notes app. It covers the part they all skip: what happened in a project, why decisions were made, and where you left off. Here's the honest split.
Use Notion if you need a customizable team workspace for docs, wikis, and databases; use ContextOS if you need to resume individual projects without rebuilding context.
Use Obsidian if you want a local-first personal knowledge graph of linked notes; use ContextOS if you want structured per-project memory with an AI resume briefing, no folder upkeep.
Use Linear if your team ships from a sprint backlog and needs fast issue tracking; use ContextOS if you juggle multiple solo projects and need to reload context on return.
Use Asana if you coordinate a team's tasks, assignments, and timelines; use ContextOS if you're a solo builder who needs to remember what happened in each project.
Use Todoist if you want quick capture and a clean daily to-do list; use ContextOS if you want to know exactly where a project stands weeks later, and why.