A smart lock is a standalone device that controls entry for a single door and comes in a lot of different flavors.  For your business, finding smart locks that are rated for commercial usage will ensure they will meet the quality and durability needed from higher traffic levels.  Additionally, commercial smart locks will offer software designed for your business – multiple user roles, access privilege times and levels, remote management, notifications, reporting, and more.
Access control systems are more robust systems for businesses of any size.  They offer centralized control can work with multiple device types and access hardware brands.  They are designed for spaces that have many users and may require different access levels – for instance, employees in the office five days per week versus contractors who only need access for a weeklong stretch. Or a secured room that only a select group of team members need access.