HR case study: +82 hires/mo on the same ad spend | PrimexAI
B2B ยท HR ยท AI voice agent

HR: +82 hires a month from the same traffic

A high-volume staffing agency was losing candidates between the application and their first day on the job. An AI sales agent closed the gap โ€” with zero increase in ad spend.

+82
hires per month
โˆ’25%
cost per hire
9.4%
application-to-hire rate (was 7.1%)
+40%
candidate contacts

The situation

High-volume staffing ยท Logistics + retail ยท US staffing agency

The agency pulled a heavy stream of applicants from Indeed, ZipRecruiter, LinkedIn, its own site and text/chat channels. The flow was mixed: qualified candidates, mass apply-to-everything submissions, delayed starts 2โ€“4 weeks out, and no-answers. The money was lost not on lead gen, but inside the funnel.

Problems before deployment
  • Many candidates never picked up โ€” no systematic call-back attempts
  • "Not now / later" leads fell out of the funnel with no follow-up
  • Candidates never made it to the interview โ€” lost along the way
  • Weak first-pass screening: irrelevant applicants handled the same as target ones
  • Old database and delayed demand weren't worked systematically
  • A large share of applications never turned into hires
Before / After
BEFORE ยท Reached the candidate
50.1% (1,746 of 3,482)

AFTER ยท Reached the candidate
70.0% (2,463 of 3,517) +717

BEFORE ยท Started the job
247 hires/mo (7.1%)

AFTER ยท Started the job
329 hires/mo (9.4%) +82

BEFORE ยท Cost per hire
Baseline

AFTER ยท Cost per hire
โˆ’25% vs baseline

Before vs After, stage by stage

Funnel stage Before AI sales agent After AI sales agent Gain
Applicants / mo 3,482 ($5.24 CPA) 3,517 ($5.20 CPA) โ‰ˆ same budget
Reached the candidate 1,746 (50.1%) 2,463 (70.0%) +717
Passed first-pass screening 924 (26.5%) 1,238 (35.2%) +314
Made it to the interview 611 (17.5%) 903 (25.7%) +292
Started the job 247 (7.1%) 329 (9.4%) +82

What the AI sales agent took over

1

Systematic call-back attempts

Candidate didn't pick up? The AI agent calls back automatically after 2, 4 and 24 hours. Reach across the candidate pool went from 50% to 70% โ€” with no recruiter lifting a finger.

2

First-pass screening on a script

The voice agent runs the qualifying questions: experience, availability, shift type, pay expectations. Irrelevant applicants get filtered out on the spot โ€” recruiters only ever see candidates worth their time.

3

Working "not now / later" leads

Candidate says "in two weeks"? The system books the task and calls back at the right moment. Delayed demand no longer slips out of the funnel.

4

No-show reminders and interview confirmation

The day before, the AI agent reminds the candidate of the time and location by call and Twilio SMS, answers their questions and confirms attendance. The "passed screening โ†’ showed up to interview" rate climbed from 66% to 73%.

Business impact

+82
Extra hires per month from the same traffic โ€” the AI sales agent strengthened the middle of the funnel, not lead gen
โˆ’25%
Lower cost per hire โ€” more starts on the same ad spend and cost-per-applicant
+717
Extra candidate contacts per month โ€” reach across the applicant pool went from 50% to 70%
+314
More candidates clear first-pass screening every month โ€” funnel quality rose thanks to automated qualification

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