Littlebird runs as an always-on Mac assistant that observes your work across meetings, emails, and documents, then surfaces that context when you need it — without manual tagging or note-taking. Ask it what was decided in Tuesday's call, and it answers from what it actually heard. Draft an email and it pulls relevant background without you prompting it to. The ceiling appears when you move off Mac: there is no Windows client, no API, and no self-hosted option, so teams with mixed operating systems or strict data-residency requirements hit a wall immediately. Teams that need cross-platform coverage or want to pipe the context layer into their own tooling look elsewhere.