redfl!ag — manipulation signals AI detector
Try it
The truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehood
The truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehoodThe truth is that no technology is capable of determining truth and falsehood

Manipulation Signals AI Detector

See what
words hide.
Spot the signal.

RedFlag AI is a speech and video analysis tool that listens to voice, watches facial expressions, and observes gestures — then flags the moments when they don't align.

No signup · Works with public YouTube linksOpen full analyzer
Detect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have fun
Detect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have funDetect the signals — have fun

Live analyzer · Demo

Watch the signals light up.

A quick look at the analyzer in motion. Ready for the real thing? Paste a YouTube URL below — or open the full workspace.

Analyzing00:00 / 00:33
Demo · live signals
Unsure
www.redfl.ag

Beta notice

This is the beta version of our solution. The more you use it, the smarter it becomes over time.

Currently, it supports only a single speaker in the frame. We're actively working to remove this limitation.

How it works

5 steps.

  1. 01Paste the video link
  2. 02Allow RedFlag to access the tab so the video can load on the screen
  3. 03Press play
  4. 04When signals slightly diverge, the screen turns yellow; when the mismatch is strong, it turns red. That's your Red Flag — the rest is up to you.
  5. 05Download the processed RedFlagged video and share it with friends. Let them have fun too 🙂

About RedFlag

RedFlag is not a lie detector.

It is a cognitive assistant designed to help you notice moments of potential manipulation.

There is no technology capable of objectively determining truth or falsehood. Human communication is complex, contextual, and deeply situational. Even the most advanced tools — from polygraphs to behavioral analysis — cannot replace human judgment.

What is possible, however, is identifying inconsistencies between different layers of communication. RedFlag analyzes verbal, paraverbal, and non-verbal signals during speech and highlights moments where these signals diverge. Such mismatches may indicate uncertainty, internal conflict, or low confidence in one's own words.

RedFlag does not draw conclusions for you. It simply surfaces "red flags" — moments that may warrant closer attention. The interpretation is always yours.

Science

Grounded in decades of interdisciplinary research.

Across psychology, linguistics, and behavioral science, studies consistently show that deception and manipulation are not expressed through a single universal signal. Instead, they emerge through patterns and contradictions across multiple channels of communication.

Nonverbal behavior

Facial expressions, micro-movements, eye activity.

Paralinguistics

Tone, pitch, rhythm, pauses, speech rate.

Cognitive load theory

Links mental strain to behavioral leakage.

Confidence research

How internal belief shapes outward expression.

There are no "sure signs" of lying — only probabilistic indicators. RedFlag follows this principle strictly. It highlights signal divergence, not "truth" or "lies."

Technology

RedFlag analyzes the following signals.

  • Blink rate
  • Gaze stability
  • Head stability
  • Brow furrow
  • Jaw tension
  • Smile authenticity
  • Voice volume
  • Pitch frequency
  • Verbal stability
  • Vocal activity
  • Speaking rate
  • Filler ratio
  • Filler count

It detects deviations, identifies inconsistencies, and summarizes the data into simple, intuitive markers.

Ready to spot the signals?

Try Detector Free