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Head-to-head · Emotion AI Software

Realeyes vs Behavioral Signals API

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Realeyes #3 in Emotion AI Software 8.6/10 Pricing on request ✓ 2 of 3 features Visit Realeyes
Behavioral Signals API #4 in Emotion AI Software 8.4/10 Free plan Free plan✓ 2 of 3 features Visit site

Realeyes leads on 0 checks, Behavioral Signals API on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreRealeyes · 8.6/10
  • Free planonly Behavioral Signals API

Realeyes scores higher on our rubric for emotion ai software: 8.6 against 8.4 out of 10; our editors rank them #3 and #4.

On deployment, Behavioral Signals API gives you Api where Realeyes offers Cloud.

Realeyes is the better fit for researchers measuring ad and audience response. Behavioral Signals API is the better fit for developers analyzing emotion and behavior in audio.

  • Realeyes fits best

    Researchers measuring ad and audience response

  • Behavioral Signals API fits best

    Developers analyzing emotion and behavior in audio

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Side by side

Feature Realeyes 8.6/10 Visit ↗ Behavioral Signals API 8.4/10 Visit ↗
At a glance
Editor score 8.6 8.4
Ranking #3 in Emotion AI Software #4 in Emotion AI Software
Best for Researchers measuring ad and audience response Developers analyzing emotion and behavior in audio
Pricing model Paid Free plan + paid
Starting price Pricing on request —
Free plan Not checked yet ✓ (best)
Free trial — —
Deployment Cloud Cloud, Self-hosted
Platforms Web Web, Android, iOS
Compliance SOC 2, GDPR GDPR
Built for Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Realeyes 2/3 · Behavioral Signals API 2/3
Real-time analysis ✓ ✓
API access ✓ ✓
Data retention control Not checked yet Not checked yet
Specs
Input modalities face, video audio, video
Deployment Cloud Api
Supported languages Not checked yet Not checked yet
Our review
Pros
  • Tracks attention and facial-expression responses while viewers watch creative
  • Shows frame-level focus heatmaps and second-by-second response traces
  • Compares creative versions with benchmarks and optional brand-lift surveys
  • Supports real-time and batch audio analysis with diarization and ASR
  • Reports interaction metrics such as speaking rate and tone variety
  • Offers SDKs for JavaScript, Android, Swift, Python, and Java
Cons
  • Pricing requires contacting sales
  • The documented Emotion & Attention API is scheduled for retirement on September 30, 2026
  • Its focus on creative response may not suit broader emotion-analysis needs
  • Core analysis focuses on audio rather than broad multimodal inputs
  • On-premises deployment is offered for custom projects
  • Some plan options focus specifically on deepfake detection
Our verdict

Realeyes offers Human Measurement for advertisers and brands evaluating video and other creative. It combines audience-attention measurement with facial-expression analysis to show how viewers respond, making it a fit for research teams…

Read the review →

Behavioral Signals API analyzes audio for emotion, behavioral predictions, and interaction metrics, aimed at developers adding those capabilities to third-party applications. Outputs include emotion labels such as anger, happiness,…

Read the review →
  1. RealeyesEmotion AI Software 8.6Pricing on request
  2. Behavioral Signals APIEmotion AI Software 8.4Free plan

Strengths and trade-offs

  • Realeyes — where it wins

    • Tracks attention and facial-expression responses while viewers watch creative
    • Shows frame-level focus heatmaps and second-by-second response traces
    • Compares creative versions with benchmarks and optional brand-lift surveys

    Where it doesn't

    • Pricing requires contacting sales
    • The documented Emotion & Attention API is scheduled for retirement on September 30, 2026
    • Its focus on creative response may not suit broader emotion-analysis needs

  • Behavioral Signals API — where it wins

    • Supports real-time and batch audio analysis with diarization and ASR
    • Reports interaction metrics such as speaking rate and tone variety
    • Offers SDKs for JavaScript, Android, Swift, Python, and Java

    Where it doesn't

    • Core analysis focuses on audio rather than broad multimodal inputs
    • On-premises deployment is offered for custom projects
    • Some plan options focus specifically on deepfake detection
  • Realeyes8.6/10 · Pricing on request

    Creative testing pairs facial-response measures with time-based analysis and optional surveys.

    Visit RealeyesFull verdict →
  • Behavioral Signals API8.4/10 · Free plan

    Audio analysis API for emotion, behavior, interaction metrics, and voice deepfake detection.

    Visit siteFull verdict →

More comparisons

All emotion AI software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update