about deepcalls
DeepCalls was founded by Lara Hemstede, cybersecurity specialist with 10 years of experience.
She saw how easily employees share confidential information over the phone - often with the best of intentions, but with major privacy and security implications.
With realistic mystery calls, we test how resilient organisations are against voice phishing: attacks that use pressure, authority or empathy to extract information.
The results are often confrontational: in 60-80 % of conversations, sensitive data is shared.
Mystery calls reveal whether policies and human behaviour really work in practice.
- Stay GDPR-compliant
- Prevent data breaches
Why organisations work with us
Years of experience in cyber security
Lectures & training on digital security
Employees trained in security awareness
our mission
At DeepCalls, our mission is to make organisations permanently resilient against social engineering and telephone data breaches - by structurally strengthening people, processes and awareness.
Awareness
We raise employee awareness about social engineering , privacy, security and telephone data breaches.
Review
We identify where processes and people are vulnerable through realistic voice-phishing simulations and scenarios.
Improvement
We translate findings into concrete advice, practical areas for improvement and targeted training.
Confidentiality
We process all data carefully, anonymously and GDPR-compliant. Privacy is always paramount.
Process enhancement
We help organisations improve their internal procedures and verification steps so that people and process together form a strong line of defence.
Resilience
We ensure that security is not a snapshot, but a continuous process, so that your organisation remains permanently protected against social engineering.
About us team
lara hemstede
Founder DeepCalls
Lara is responsible for the overall management and strategic direction of DeepCalls, as well as the execution and quality assurance of the voice-phishing simulations.
Jerrian van Slochteren
Sales & Marketing
Jerrian leads strategy, engineering, sales and marketing, ensuring DeepCalls continues to grow with strong, consistent and high-quality services.
Bianca Coster
Operations coordinator
Bianca is responsible for including contract management, quote preparation, invoicing and general administration, ensuring internal processes run smoothly and professionally.
Testimonials
Lara works for a variety of organisations and government bodies as a speaker, trainer and cyber security consultant. Here’s what they say about working with her.
Meral Aktan
CISO Municipality of Amstelveen Aalsmeer
Lara gave an interesting and impressive lecture at the municipality of Amstelveen during the Week of Safety. The audience was very enthusiastic about her way of speaking as well as her knowledge and expertise on the subject.
Trienke Hammink
Policy officer awareness Municipality of Utrecht
What an excellent speaker Lara is! Her lecture on cybercrime is engaging and inspiring. She explains complex topics clearly, interacts naturally with her audience, and provides concrete, actionable tips. Her professional and flexible attitude also makes her a real pleasure to work with.
Roseanne de Kloe
Sr advisor awareness Rijkswaterstaat
Lara gave an inspiring lecture on cybersecurity at Rijkswaterstaat. Lara had immersed herself well in our target group, making it a good fit. With her personal story and practical knowledge, she managed to captivate employees.
How well do your employees recognise deception?
Just one phone call can lead to a data breach. Test how well your organisation is protected against human error and AVG risks.
Frequently asked questions
Below you will find answers to the most frequently asked questions. Is your question not among them? Feel free to contact with us.
DeepCalls conducts all mystery calls within the framework of the GDPR. We never more personal data than strictly necessary and process all findings anonymous and confidential. No unauthorised recordings are made and all data is stored and processed securely.
All the information we collect during a test is used exclusively for reporting. Data are not shared with third parties, recorded anonymously and securely deleted after completion of the project. Confidentiality is always paramount at DeepCalls.
We determine this together. Typically, we perform 4 to 10 calls per assessment, with the option to run the programme 4 or 6 times a year, or to scale up to larger call volumes for broader insight.
Costs depend on the number of calls, the complexity of the scenarios and any follow-up services such as training or consultancy. During a no-obligation introductory meeting, you will receive a clear, tailor-made offer..
You usually receive the report within 5 working days after the last mystery call. This contains summaries of the calls, concrete findings, areas for improvement and recommendations.
Yes. In addition to voice-phishing simulations, we provide targeted training, awareness sessions, and advisory support to strengthen employees’ understanding of social engineering and to help design GDPR-proof processes. This way, we work together towards a structurally resilient organisation.