By Rajni Bansal 
An applicant tracking system, or ATS, is software that manages candidates through your hiring pipeline. It stores resumes, tracks stages, and logs every touchpoint with a candidate. It’s not the same as a CRM. A CRM manages relationships with clients and candidates over time. An ATS manages the active hiring process itself.
This glossary defines 11 ATS terms you’ll run into while researching software for your agency. Each one gets a short, plain definition. No jargon, no fluff, no filler.
Quick-reference table
| Term | In one line |
|---|---|
| Applicant tracking system | Software that manages candidates through your hiring pipeline |
| What is an applicant tracking system | The core question this whole glossary answers |
| Applicant tracking system for recruiters | An ATS built around a recruiter’s daily workflow |
| Applicant tracking system for staffing agencies | An ATS built for multi-client, multi-job-order recruiting |
| AI ATS | An ATS with AI built into its screening and matching |
| AI ATS system | Same meaning as AI ATS |
| ATS software | The product itself, free or paid |
| Staffing agency ATS | An ATS designed around agency workflows specifically |
| Resume parsing | Software pulling structured data out of a resume |
| Candidate pipeline (ATS sense) | Candidates moving through your hiring stages |
| Requisition / job order | A specific role you’re actively hiring for |
Applicant Tracking System
An applicant tracking system is the system of record for your hiring pipeline. It stores every resume, application, and note in one place. It tracks each candidate’s stage, from sourced to placed. Most agencies can’t run high volume without one. Spreadsheets simply break down past a handful of open roles.
What is an applicant tracking system?
An applicant tracking system is software that organizes and moves candidates through hiring. Think of it as the database plus the workflow engine together. It replaces spreadsheets, inbox folders, and sticky notes. Every recruiter on your team sees the same candidate history.
Applicant Tracking System for Recruiters
An applicant tracking system for recruiters is built around a recruiter’s daily tasks. That means fast resume review, quick status updates, and easy client submissions. It’s different from an ATS built mainly for HR compliance tracking. Recruiter-first tools prioritize speed over paperwork.
Applicant Tracking System for Staffing Agencies
An applicant tracking system for staffing agencies handles many clients and job orders at once. One candidate might be considered for three different clients. The ATS needs to track each submission separately. Generic ATS tools built for a single employer often can’t do this well.
AI ATS
An AI ATS is an applicant tracking system with AI built into its core workflow. It can parse resumes, score candidates, and rank matches automatically. That’s different from an older ATS with AI features bolted on later. Ask a vendor whether AI is native or added on top.
AI ATS System
AI ATS system means the same thing as AI ATS. Vendors use both phrasings on product pages and in ads. The features and the underlying software don’t change based on the wording.
ATS Software
A staffing agency ATS is an ATS designed specifically around agency workflows. It handles job orders per client, not just one internal hiring plan. It supports fast, repeated candidate submissions to different companies. A generic corporate ATS usually can’t flex this way.
Resume Parsing
Resume parsing is software pulling structured data out of a raw resume. It extracts name, skills, experience, and contact details automatically. That data then populates the candidate’s profile inside your ATS. Good parsing saves recruiters from manual data entry on every application.
Candidate Pipeline (ATS Sense)
A candidate pipeline in an ATS tracks people moving through your hiring stages. Sourced, screened, submitted, interviewed, placed, each stage is visible at a glance. That’s different from a CRM pipeline, which tracks client deals instead. Staffing agencies rely on both pipelines, watched separately, every day.
Requisition / Job Order
A requisition, or job order, is a specific role you’re actively hiring for. It holds the client’s requirements, headcount, and target timeline. Every candidate in your ATS gets linked back to one or more requisitions. Agencies often juggle dozens of open job orders at once.
The Bottom Line for Staffing Agencies
Most of these 11 terms describe small variations on one core system. The one distinction that actually matters is ATS versus CRM. An ATS manages your active hiring pipeline. A CRM manages ongoing client and candidate relationships. Staffing agencies need both, working together, not as two disconnected tools.
Hirin runs AI-native ATS, CRM, and candidate engagement in one platform. See it for yourself.
