Head to head

Polygraf AI vs Spark Hire

Same facts, side by side: starting price, free tier, MCP, API and what each one is actually built for.

Polygraf AI

Sales-quoted

AI security suite that also flags interview cheating from tools such as Cluely. Hiring detection is sales-quoted.

Where Polygraf AI fits

TA teams fighting AI-coached live interviews
Security teams that want on-prem AI policy enforcement
Employers hiring into sensitive or government roles
Companies that need deepfake and synthetic-voice checks

Spark Hire

$249/mo

One-way and live video interviews, with a separate ATS. Video starts at $249/mo billed annually.

Where Spark Hire fits

TA teams replacing live first rounds with one-way video
SMBs that want video without an enterprise HireVue contract
Companies that may grow into Spark Hire's ATS
Desks on Greenhouse or Lever that only need the video layer

At a glance

Detail	Polygraf AI	Spark Hire
Starting price	Sales-quoted	$249/mo
Free tier	–No	–No
MCP server	–No	–No
Public API	✓Yes	✓Yes
Listed under	Candidate fraud & AI detection, Interviewing	Interviewing
Capterra	Not enough reviews	4.7 from 109 reviews

Where they pull apart

Polygraf AI

Stands out: Transcribes interviews and scores AI-coached answers in under 2 seconds, aimed at Cluely, Yoodli, InterviewCoder, and Pickle.

Watch out: The hiring detector is demo-sold. Retail AI-detector plans exist for writing, but those are a different SKU from interview fraud.

Not the right fit for

Teams that want a self-serve interview SKU with a rate card
Buyers who only need a cheap writing detector

Spark Hire

Stands out: Unlimited video interviews at a public $249/month annual start, then a full ATS if you want sourcing and workflows in the same vendor.

Watch out: The ATS (Recruit Pro) starts at $335/month billed annually, not $249. AI resume review and notetaker hours are metered by ATS plan. No free trial is advertised.

Not the right fit for

Enterprises standardised on HireVue
Buyers who thought $249 included the ATS
Teams that cannot ask candidates to record video

Pros and cons

Polygraf AI

Interview cheating detector for live audio
On-prem deploy option for sensitive employers
Flags named coaching tools in real time

Hiring SKU is sales-quoted
No self-serve checkout for interviews
Writing-detector prices are a different product

Spark Hire

Public $249/mo annual start for unlimited video
One-way and live in the same product
Optional ATS if you want one vendor

ATS starts at $335/mo annual, not $249
No advertised free trial
AI notetaker hours are capped on ATS plans

What each one costs

Polygraf AI

Sales-quoted

Sales-quoted. The Interview Cheating AI Detector is sold on a demo. Retail writing-detector plans are a different SKU. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Spark Hire

$249/mo

Video interviewing from $249/mo billed annually. The applicant tracking system is a separate plan from $335/mo. Confirm current terms on the vendor site.

Checked 18 Sep 2026

Common questions

Can you try Polygraf AI or Spark Hire for free?

Neither carries a free tier on our listing.

Not the pair you wanted?

All Polygraf AI alternatives All Spark Hire alternatives Every Candidate fraud & AI detection tool

Editorial listings, never paid rankings. Prices checked 19 Sep 2026. Confirm current terms on the vendor site. Spot an error?