Quick answer
FakeYou was tested against VoiceCheck and blocked within its recommended configuration. Its clones only crossed the 60 test threshold on low landline audio, scoring 66 at best, well below the 79 to 89 range genuine users reach and referred to a Help Desk in production. On laptop and cell phone audio FakeYou did not pass, and it failed to pronounce some names accurately.
Verdict
Blocked, with Help Desk check
Laptop (best 50) and cell phone (best 22) clones stayed below the pass line of 60. Low-quality landline (best 66) passes go to a Help Desk, not straight in.
AI voice cloning tools like FakeYou can copy a voice from seconds of audio, so a fair question follows: can a FakeYou clone slip past VoiceVantage? To answer it with evidence, the Institute for Cyber Security and Resilient Systems at Ontario Tech University (UOIT) tested VoiceCheck against the five most popular deepfake tools, including FakeYou. This page shows FakeYou's results in full.
FakeYou vs VoiceCheck: the scores
FakeYou's highest deepfake score against VoiceCheck, by audio channel
Pass threshold set to 60 for single-factor testing. Genuine users typically score 79 to 89. Scores from independent UOIT testing.
50
Laptop microphone (high quality)
best deepfake score: 50 / 100
Blocked (below pass)
22
Cell phone (medium quality)
best deepfake score: 22 / 100
Blocked (below pass)
66
Landline 8kHz (low quality)
best deepfake score: 66 / 100
Help Desk referral in production
FakeYou deepfake score Pass threshold (60) Genuine user range (79 to 89)
What these results mean
The pattern is clear. FakeYou only approached the pass line at the lowest audio quality, a landline call, where its best clone scored 66. That sits far below the 79 to 89 band genuine users reach, and in a live deployment any score in that range is referred to a Help Desk. On laptop and cell phone audio, FakeYou clones did not pass.
FakeYou also struggled with accuracy. In testing it failed to pronounce some participant names correctly, which drove several attempts to zero. That makes it one of the weaker threats among the five tools, despite its large library of voices.
Summary by audio channel
| Audio channel | FakeYou best score | Genuine user range | Outcome |
|---|---|---|---|
| Laptop microphone | 50 | 79 to 89 | Blocked |
| Cell phone | 22 | 79 to 89 | Blocked |
| Landline (8kHz) | 66 | 79 to 89 | Help Desk referral |
About FakeYou
FakeYou is a user-friendly platform that offers text-to-speech and voice-to-voice cloning along with a large library of voice packs. Clone quality depends on how much training audio is provided.
Why VoiceVantage blocks FakeYou deepfakes
VoiceVantage validates a voice in as little as 1.4 milliseconds and is built on many years of signal-processing research. Its recommended configuration pairs the score threshold with a Help Desk referral for low scores, so the small residue of low landline passes seen in testing is caught before it reaches an account. Across all five leading deepfake tools, including FakeYou, VoiceVantage stayed secure within its recommended configuration.
Compare VoiceVantage with the other tools
Frequently asked questions
Can FakeYou voice clones bypass VoiceVantage?
In independent UOIT testing, FakeYou was blocked within VoiceCheck's recommended configuration. Its clones only crossed the 60 test threshold on low landline audio, scoring 66 at best, below the 79 to 89 range genuine users reach and referred to a Help Desk in production.
What was FakeYou's highest score against VoiceVantage?
66, on a low-quality landline attempt. On laptop and cell phone audio FakeYou clones did not pass, and the tool failed to pronounce some names accurately.
Is VoiceVantage safe against AI voice cloning?
Yes, within its recommended configuration. Across 533 independent attempts using all five leading deepfake tools, the pass rate was very low, and passing scores were confined to low landline quality and referred to a Help Desk.
How was this tested?
By the Institute for Cyber Security and Resilient Systems at Ontario Tech University (UOIT), using FakeYou to generate deepfake voice clones and attempting to authenticate against VoiceCheck across laptop, cell phone, and landline channels.
See VoiceVantage block deepfakes for your organization
Independently tested against the five leading AI voice-cloning tools.
Source: VoiceVantage VoiceCheck Verification Capability Analysis using five top deepfake apps, Ontario Tech University (UOIT), 2025. Read the announcement: VoiceVantage blocks the top five deepfake voice products across 533 independent tests.