Matter, a new smart home standard, has gained momentum with several devices and accessories now compatible. Devices using proprietary bridges, such as Philips Hue bulbs or SwitchBot door locks, can be "bridged" into Matter for control in a Matter smart home platform. However, users may lose features if they bridge their devices through Matter rather than existing integrations.
A Matter controller is required to onboard devices, manage communications and automations, and facilitate remote access. Major smart home platforms have updated their hubs and speakers to become Matter controllers, with some also serving as Thread border routers for added convenience.
Source: https://www.theverge.com/23568091/matter-compatible-devices-accessories-apple-amazon-google-samsung