Lark is an all-in-one collaboration suite (messaging, video meetings, docs, calendar, and workplace apps) built by ByteDance — the same parent company as TikTok — and operated internationally through Singapore-based Lark Technologies Pte. Ltd. Lark holds real compliance certifications (SOC 2 Type II, ISO 27001) and strong review scores, but its ByteDance ownership carries genuine, well-documented data-security and governance scrutiny relevant to enterprise and government buyers.