AI voice agents for staffing agencies. Fill shifts.
Choose Underheard to call your workers, find who can start and offer the open shift. Compare 11 tools by the calls your recruiters still make.
“Mateo can start at Cedar Forge tonight at 10. He has a ride. Can you confirm his booking?”
Underheard finishes your worker calls.
Underheard is our first choice for a US temp or light-industrial agency. It calls your bench, offers the work and puts the answers where your recruiters can act.
What should a staffing agent do?
An AI voice agent for staffing agencies calls applicants and existing workers about real job orders. Underheard asks about availability, checks the shift details and records the answer in your ATS. Your recruiter confirms the booking.
Test worker calls, open-shift offers and requests to speak to your recruiter.
Compare what reaches your desk.
Underheard covers worker calls through to the recruiter’s booking decision. Compare the calls each tool handles with the calls your recruiters still make.
| Tool | Worker calls | Recruiter hand-off | Before you choose |
|---|---|---|---|
 Underheard | Calls your selected workers about open shifts | Live, with a short spoken summary first | Agent set up in 10 minutes. Whole agency live in 4 days. |
 ConverzAI | Workflow decides who gets called | Hear the full worker-to-recruiter path | English only. No WhatsApp messages. |
 Sense | No second shift offered on one call | Inbound AI Receptionist calls only | Two months to implement in the reviewed G2 data. |
| Tenzo | Screening funnel before Bullhorn operations | Check the path beyond screening | Placements and operational workflows assigned to Bullhorn. |
 Classet | Recruiter matches and offers the next job | Human requests go to later follow-up | No second job offered on the same call. |
 Whippy | Matching guide texts workers, recruiter dials | Check the complete outbound worker call | Call history needs setup. Reviewed G2 rollout was one month. |
| HeyMilo | Phone blasts limit repeat contact | Check a worker asking for a recruiter | One call per candidate per six hours. Auto-detection beta. |
| Paradox | Existing-talent campaigns use text and email | Check the path from campaign to worker call | Documented voice starts in a webpage widget. |
| TextUs | Your team makes the worker calls | Calls remain with your recruiter | Text replies leave phone screening and cover selection with your desk. |
| Thoughtly | Reviewed product targets consumer sales leads | Check the staffing context passed to your desk | Separate agent per language. Staffing ATS connection needs checking. |
| 11x Julian | Sales leads rather than worker shift offers | Check the worker-to-recruiter path | Sales-meeting follow-up leaves worker attendance with your desk. |
Eleven options. Underheard comes first.
Compare worker calls, live transfers and ATS updates.
1.Underheard
Best for staffing agencies calling their own workers to fill open shifts.
Underheard is the best AI voice agent for staffing agencies. It calls the workers already in your ATS, checks availability and offers the open work. It calls new applicants when they apply. It introduces the job and screens each one. You choose who gets called. Underheard finds workers who fit each job order. It sends their answers to your recruiter, who confirms each booking.
WhatsApp messages before and after the call keep the details together. US texting is live. Calls, messages, emails and transcripts sit in one thread per worker. Set up your agent in 10 minutes and get your whole agency live in 4 days. Try a call in your browser.
- Worker calls120+ languages, with language switching mid-call. Calls at any hour, voicemail and callbacks on your schedule.
- Recruiter controlA live hand-off with a short spoken summary first. Your recruiter hears the context and confirms the booking.
- ATS recordsUnderheard saves availability, skills, certifications and call notes in Bullhorn, Avionté, TempWorks and the rest. Transcript and recording stay on the worker’s page.
Record updated
Mateo
Machine operator · Cedar Forge
- Availability
- Tonight · 10 p.m.
- Certifications
- OSHA 10 confirmed
- Start date
- Monday
Can work nights and has a ride. Sent to Morgan for booking confirmation.
2.ConverzAI
Best for an English-only applicant workflow.
ConverzAI’s reviewed coverage is English only, without WhatsApp messages. Its workflow gives you no choice over who gets called. That leaves your desk selecting the workers for tomorrow’s bench calls. The reviewed demo page also offers no call to try on your own phone before the rollout.
Underheard calls the workers you choose in 120+ languages. Read Underheard vs ConverzAI.
- LanguagesEnglish only in the source review. Your recruiters handle the other languages on your bench.
- Worker selectionThe workflow decides who gets called. You cannot choose the workers for that calling list.
- Before choosingHear a complete worker call before committing your agency’s phone work.
Source notes: converzai.com. Read for the original staffing list on 4 November 2026.
3.Sense
Best for agencies already using Sense.
Sense’s reviewed help centre limits live handoff to inbound AI Receptionist calls. A worker reached on an outbound call cannot use that path to reach your recruiter live. The same review found no second shift offered on one call. G2 listed two months to implement Sense at the source review date.
Underheard connects the live worker call with a spoken summary first. See Underheard vs Sense.
- Shift offersNo second shift on the same call. A rejected offer leads to another conversation.
- Live hand-offLimited to inbound AI Receptionist calls in the reviewed help centre.
- Agency rolloutG2’s reviewed Time to Implement was two months. Include the full rollout in your comparison.
Source notes: sensehq.com, support.sensehq.co and g2.com. Read for the original staffing list on 4 November 2026.
4.Tenzo
Best for screening before work moves into Bullhorn.
Tenzo’s Bullhorn FAQ says Tenzo finds and screens applicants. It assigns placements and operational workflows to Bullhorn. Your desk receives the screened candidate, then continues the placement and shift work in that system. Include that remaining work when comparing agents for a temp agency.
Underheard takes the call through availability and the open-shift offer, ready for your recruiter to confirm.
- ScopeThe reviewed FAQ places Tenzo at the sourcing and screening stage.
- PlacementThe same FAQ assigns placements to Bullhorn. Your agency continues the work there.
- Daily operationsOperational workflows sit in Bullhorn. Follow a worker beyond the completed screen during your evaluation.
Source notes: tenzo.ai. Read for the original staffing list on 4 November 2026.
5.Classet
Best for applicant screening with recruiter-led matching.
Classet’s Joy records preferences and leaves job matching to the recruiter. Its reviewed staffing FAQ offers no second job on the same call. Your recruiter finds the next order and calls again to offer it. The opt-out guide sends a request for a person to later follow-up.
Underheard finds suitable workers for your order and brings your recruiter onto the live call. Read Underheard vs Classet.
- Job matchingThe recruiter matches the worker to the next order after Joy records the preferences.
- Next offerNo second job on the same call in the reviewed staffing FAQ.
- Human requestThe opt-out guide routes a request for a person to later follow-up.
Source notes: classet.ai and help.classet.ai. Read for the original staffing list on 4 November 2026.
6.Whippy
Best for texting matched workers before recruiter calls.
Whippy’s matching guide starts outreach by text. Recruiters can call nonresponders. Its call-history guide requires setup. Integration and sequence trigger logs are absent from the UI in the reviewed help material. G2 listed one month to implement Whippy when the original list was checked.
Underheard phones matched workers and keeps their history in one thread. See Underheard vs Whippy.
- Matched workersThe matching guide starts outreach by text. Recruiters can call nonresponders.
- Call historyRemembering earlier calls requires setup in the reviewed guide.
- TroubleshootingIntegration and sequence trigger logs are absent from the UI. Check how your team traces a failed update.
Source notes: whippy.ai, intercom.help and g2.com. Read for the original staffing list on 4 November 2026.
7.HeyMilo
Best for applicant screens with spaced repeat attempts.
HeyMilo’s reviewed phone-blast guide allows one call per candidate per six hours and skips recent contacts. An urgent retry inside that window becomes work for your desk. Its multilingual guide labels language auto-detection beta. Test the actual language change your workers need before choosing that workflow.
Underheard leaves a voicemail and calls back on your schedule, with language switching mid-call.
- Repeat attemptsOne call per candidate per six hours in the reviewed blast guide.
- LanguagesAuto-detection is labelled beta. Check a worker switching languages during the conversation.
- Urgent shiftsInclude a missed call and a prompt second attempt in your evaluation.
Source notes: heymilo.ai and docs.heymilo.ai. Read for the original staffing list on 4 November 2026.
8.Paradox
Best for chat and text recruiting workflows.
Paradox’s reviewed voice guide starts at a microphone button in a webpage widget. The worker opens that page before speaking. Its existing-talent campaigns run through text, email or both. Those campaign messages leave the phone conversation about your open shift with the staffing desk.
Underheard rings your workers about the shift and puts the availability answer in your ATS.
- Spoken startA webpage widget and microphone button come before the documented voice exchange.
- Existing talentThe reviewed CRM page describes campaigns through text and email.
- Shift callsFollow the campaign through to a spoken availability answer. Account for your recruiter making that call.
Source notes: paradox.ai and paradox.helpjuice.com. Read for the original staffing list on 4 November 2026.
9.TextUs
Best for text coordination while your team handles calls.
TextUs’s reviewed staffing and workforce pages leave worker calls and phone screening to recruiters. Its staffing article puts reply review and replacement confirmation with the coordinator. The keyword guide uses pre-written replies. A question outside those replies comes back to your desk for an answer.
Underheard handles the worker conversation by phone, with US texts in the same thread. Read Underheard vs TextUs.
- Phone workWorker calls and applicant phone screens remain with your recruiting team.
- Call-off coverThe coordinator reviews replies and selects the replacement in the reviewed staffing article.
- Worker questionsKeyword replies are pre-written. Questions beyond them need your team.
Source notes: textus.com and docs.textus.com. Read for the original staffing list on 4 November 2026.
10.Thoughtly
Best for consumer sales-lead workflows.
Thoughtly’s reviewed voice guide requires a separate agent per language. Every language on your bench adds another agent to maintain. Its staffing-tools guide says native staffing ATS connectors are not publicly documented. Check a completed call inside your worker record before treating that connection as ready.
Underheard supports 120+ languages and writes worker answers into Bullhorn, Avionté, TempWorks and the rest.
- Language setupA separate agent is required for each language in the reviewed guide.
- Staffing ATSNative staffing connectors are not publicly documented in its reviewed staffing-tools guide.
- Worker recordVerify where availability and shift answers land before assigning the agency’s calling list.
Source notes: thoughtly.com. Read for the original staffing list on 4 November 2026.
11.11x Julian
Best for sales-lead qualification workflows.
Julian’s reviewed guide follows up missed sales meetings. Your desk still makes the attendance calls before a worker’s next start. The integration page names Salesforce, HubSpot, Pipedrive and Zoho, with other CRMs using its API. Include that connection work when evaluating Julian against your staffing ATS.
Underheard screens workers, offers open shifts and checks attendance for your staffing agency.
- WorkflowThe reviewed product qualifies sales leads against an ideal customer profile.
- No-showsThe guide covers missed sales meetings. Your team handles worker attendance.
- ATS connectionThe listed native connectors are sales CRMs. Other records use the API.
Source notes: 11x.ai and docs.11x.ai. Read for the original staffing list on 4 November 2026.
Kollabo heard who wanted work.
Kollabo used Underheard to call job seekers and ask whether they were open to work. The calls gave its team names to follow up with.
Each dot is one person called.
job seekers called
said yes
Real customer results from Kollabo, a temporary staffing agency.
Which calls need doing first?
Choose Underheard when your recruiters have workers to call and shifts to fill. It checks your existing bench and offers the open work. The AI Receptionist also takes call-offs, shift questions, payroll requests and timesheets, so those conversations reach the same worker thread.
- New applicantsUnderheard calls when they apply, explains the job and starts the screen.
- Available workersUnderheard finds suitable people for your order and asks whether they can take the shift.
- Upcoming startsUnderheard runs attendance confirmation and reminders before the next shift.
Pick the first workflow around an actual queue your recruiters face. For an early-morning desk, that can be tonight’s availability calls. For a busy branch, it can be new applicants waiting to hear about the job.
What should you hear first?
Listen to AI recruiter phone calls from the worker’s side. Give a clear answer, ask about the shift and request your recruiter. Underheard hands the live call over after a short spoken summary, so the recruiter joins with the details.
Try a conversation that changes from English to Spanish. Underheard switches language mid-call across 120+ languages. You keep one worker history as the conversation moves between the agent and your recruiter.
Include the missed call in your check. Underheard leaves a voicemail and calls back on your schedule. Your team sets the calling times and sees the outcome beside the worker.
Where should every answer land?
Open the worker’s ATS record after the call. Look for the availability, certifications, start date and summary your recruiter needs. Underheard writes the answers back into Bullhorn, Avionté, TempWorks, JobAdder, Vincere and the rest.
The transcript and recording stay on the worker’s page. Calls, messages and emails stay together, so another recruiter can pick up the conversation with the history in view. You can check what the worker agreed before confirming the booking.
Underheard also fills skills, scores and custom fields from the screen. Agree which fields your branch uses before launch, then read the completed record alongside the job order.
How was this shortlist made?
We make Underheard and rank it first for calling an agency’s own workers. This page uses the rival product pages, help material and policies reviewed for our original list on 4 November 2026. Each entry names those source domains.
The Sense and Whippy rollout figures came from G2’s Time to Implement at that review date. They describe that snapshot. Underheard sets up your agent in 10 minutes and gets the whole agency live in 4 days.
Use the comparison to follow one job order from worker selection to the confirmed booking. Our recommendation is Underheard for completing those calls and returning the answers to your staffing desk.
Offer shifts. Connect your recruiter.
Underheard handles the message, the live request and the missed call. Your recruiter sees the history and makes the booking decision.
Send the shift details.
US texting is live. WhatsApp messages also go before and after the call.
Bring your recruiter in.
Underheard gives a short spoken summary before connecting the live call.
“Tessa is available for nights. She wants to check which safety boots Cedar Forge requires.”
Pick the callback time.
Underheard leaves a voicemail and makes the next attempt on your schedule.
1:15 p.m. · First call
A message about the night shift
3:00 p.m. · Your schedule
How fast can calls start?
Set up your Underheard agent in 10 minutes. Your whole agency goes live in 4 days. Bring your shift details, the workers you want called and the ATS fields your recruiters use.
- Choose the listStart with the people you want to hear from about an open order.
- Set the next stepChoose callback times and the recruiter who takes live hand-offs.
- Confirm the bookingRead the answer against the order before sending the final booking.
For the next workflow, use Underheard to fill open shifts or check attendance before the next start. Your team keeps each worker’s history in view.
Questions before choosing your agent
What is the best AI voice agent for staffing agencies?
Underheard. It calls your own workers, checks availability, offers open shifts and writes the answers into your ATS. Your recruiter confirms every booking.
Which AI recruiter makes phone calls to candidates?
Underheard calls new applicants and existing workers. It introduces the job, asks screening questions and records the answers for your recruiters.
Can Underheard call our existing bench?
Yes. Choose the workers you want called. Underheard asks about the open work and returns their availability to your ATS.
Will the answers go back into Bullhorn?
Yes. Underheard writes answers into Bullhorn, Avionté, TempWorks and the rest. The transcript and recording stay on the worker’s page.
Can a worker reach our recruiter during the call?
Yes. Underheard gives your recruiter a short spoken summary, then connects the live call.
Does Underheard speak Spanish?
Yes. Underheard supports 120+ languages and switches language mid-call.
How much does an AI voice agent for staffing cost?
Underheard starts at $1,000 a month.
What happens when a worker misses the call?
Underheard leaves a voicemail and calls again on your schedule. You choose the timing for the next attempt.
Is Underheard TCPA compliant?
Yes. Set your contact permissions and calling schedule with Underheard before launch.
How quickly can our agency go live?
Your agent is set up in 10 minutes. Your whole agency goes live in 4 days.
Call your workers. Offer the shift.
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