Building Human Resilience for Deepfake-Driven Phishing | Julius Muth | Cyber Security District Podcast

In this episode of Cyber Security District, we sit down with Julius Muth, co-founder of Revel8, a fast-growing startup tackling one of the most urgent threats in modern cybersecurity: deepfake-powered social engineering.

Julius flew in from Berlin to join us in the Amsterdam studio and breaks down how attackers are already cloning voices, abusing call centers, and using multi-channel manipulation (email, WhatsApp, LinkedIn, video calls) to bypass technical defenses and target employees at scale.

We also get into how Revel8 scaled from early MVPs to large enterprise rollouts, the team’s operator DNA from Celonis, and their goal to build “10 million human firewalls.”

In this episode, we dive into:

• Why deepfake voice phishing is exploding via service desks and call centers
• The real-world deepfake fraud case that changed everything (25M USD)
• How Revel8 personalizes awareness with role-based “playlist” simulations
• Why time-to-first-report beats click rate as a security KPI
• How Revel8 scaled fast: funding, enterprise rollouts, and culture

Key Takeaways:

• Deepfakes turn trust signals (voice, video) into attack surfaces
• Context-rich phishing is far more effective than generic campaigns
• Awareness works best in short, relevant, continuous moments
• Measure reporting behavior and speed, not “gotcha” click rates
• Modern threats require modern training across every channel

Timestamps: 00:00 – Introduction 00:15 – Meet Julius Muth and Revel8’s mission 01:20 – Why deepfakes are a serious enterprise risk 02:30 – Voice phishing through service desks and call centers 04:00 – A real incident example and why it’s “hot” right now 04:45 – Founders’ background and the Celonis operator mindset 05:40 – Validating the market (100 handwritten letters) 07:10 – The deepfake fraud case: 25M USD and what it proved 09:20 – Social engineering is leveling up (multi-channel trust) 12:00 – The “podcast vote” scam and impersonation patterns 14:20 – From MVPs to enterprise: what changed after hiring a senior CTO 19:00 – Why traditional awareness training fails 23:40 – The “Spotify playlist” model: personalized learning journeys 26:00 – Turning real attacks into simulations 28:40 – Better KPIs: time-to-first-report and workforce sensors 31:10 – Modern payloads and “make the victim execute” tactics 34:40 – Scaling growth: team, cold-calling “Champions League,” and GTM 41:40 – Advisors, credibility, and enterprise access 45:00 – The goal of “10 million human firewalls” 46:10 – Why the name Revel8 (and the naming story) 48:40 – Hiring profile and what they look for 51:40 – Munich office move and what’s next 52:35 – Final message to CISOs

Connect with the guest: Julius Muth: https://www.linkedin.com/in/julius-muth/

Revel8: https://www.revel8.ai/

Follow Cyber Security District: Laurens Jagt on LinkedIn: https://www.linkedin.com/in/laurensjagt/ Website: https://www.cybersecuritydistrict.com/ All channels & newsletter: https://beacons.ai/cybersecuritydistrict