Digital Services Act (DSA) applies EU-wide; most transparency duties exempt micro/small enterprises
Any business offering an online intermediary service to users in the EU: hosting user content, running a marketplace or listings feature, an app store, a search engine, a social network. A micro or small enterprise (fewer than 50 staff, turnover/balance sheet under EUR 10M) is exempt from the Section 3 transparency, recommender-system and advertising duties, and keeps that exemption for a further 12 months after it stops qualifying. A company that only sells its own goods or services online, without hosting third-party content or listings (a typical single-vendor e-commerce store or a SaaS product), is generally not itself an 'intermediary service' under the DSA at all.