Usually three different types of softwares are being employed.

ATS: Applicant tracking software. It accompanies the entire hiring process and keeps track of all important information. This includes application status and candidate's qualifications, and it aids the search and filter process needed to keep track of this data.

Recruiting CRM Softwares help to track, manage and develop relations between candidates and the company. It keeps track of marketing tools, talent pools, campaigns and sources.

An interviewing software is used to support ATS systems during interview processes. With these softwares, interviews can be scheduled  and carried out. Be it video, phone or in person interviews, interview softwares supports all these processes.