No, the homepage says systemd is a "suite of software" which "provides a system ...

tomjakubowski on Jan 25, 2017 | parent | context | favorite | on: Thoughts on the Systemd Root Exploit

No, the homepage says systemd is a "suite of software" which "provides a system and service manager that runs as PID 1". The "system and service manager that runs as PID 1" is the init system. The systemd suite provides this init system.