Compare/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.

Starting price

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

DetailPolygraf AISpark Hire
Starting priceSales-quoted$249/mo
Free tier–No–No
MCP server–No–No
Public API✓Yes✓Yes
Listed underCandidate fraud & AI detection, InterviewingInterviewing
CapterraNot enough reviews4.7 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 4 Nov 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 4 Nov 2026

Common questions

Can you try Polygraf AI or Spark Hire for free?
Neither carries a free tier on our listing.

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Editorial listings, never paid rankings. Prices checked 4 Nov 2026. Confirm current terms on the vendor site. Spot an error?