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Behavioral Signals - Team

What We Do

We are bridging the communication gap between humans and machines by introducing emotional intelligence, from speech, into conversations with AI. We have created the fastest evolving and most robust emotion AI, enabling everyone to add emotion and behavioral recognition to their own software solutions, through the Oliver API. Whether it’s for a virtual assistant on a mobile phone, on the web, in a car, on a smart speaker, or for a social robot, an interactive child’s toy, a robotic carer, companies, developers or DIY enthusiasts can now design and build engaging interactions which can seamlessly benefit from our internationally acclaimed speech emotion recognition technology. Our production-level Oliver ΑPI, offers a rich variety of emotional and behavioral metrics and allows both real-time and batch audio processing, and can readily support heavy-duty applications.

Our Founders

Driven by a passion to bring our ground-breaking patented speech-to-emotion and speech-to-behaviors technologies to market, CTO, Alex Potamianos and Chief Scientist, Shri Narayanan founded Behavioral Signals in 2016. With the goal of enhancing and forever changing the world of business, technology is at the core of what we do. Our algorithms analyze human emotions and behaviors, transform data into usable information, and lead to making better business decisions and increasing profits. Until now, human emotion has been considered impossible to quantify, and impossible to measure. With our patented analytics engine, we use science to measure and interpret the “how” part of human interactions.

The Team


Rana Gujral

An exceptional forward looking visionary, Rana joined the Behavioral Signals’ family this year as its new CEO. He’s spent his career working as an investor, executive and entrepreneur with extensive experience in enterprise software, product development, strategy, business-building and emerging markets.
Prior to Behavioral Signals, Rana founded and was the CEO of TiZE, a leading machine learning SaaS startup. He raised the initial round and led TiZE through its formative traction. Prior to TiZE, Rana affected the turnaround of Cricut’s EBITDA position to profitability within a span of 2 years. Previously, Rana held leadership positions at Logitech S.A. and Kronos Inc., where he was responsible for the development of best-in-class products. Rana was awarded the ‘Entrepreneur of the Month’ by CIO Magazine and the ‘US-China Pioneer’ Award by IEIE. Rana was also listed among Top 10 Entrepreneurs to follow in 2017 by Huffington Post.

“Artificial intelligence is helping businesses create experiences that naturally integrate with consumers’ everyday lives. Human communication is a complex process that depends on the words being spoken, as well as the way they are being expressed. We understand not only what is being said but how it is being said, the emotions, intentions, state-of-mind and behaviors of each person. I’m extremely optimistic about our potential.”

CTO & Co-founder

Alex Potamianos

A rare mix of scientist and businessman, Alex is a well-regarded innovator in the field of speech and natural language processing, interactive voice response systems and behavioral informatics. He has over 20 years of leadership experience both in the corporate and entrepreneurial sides of business. His background includes working at AT&T Labs-Research, Bell Labs and Lucent Technologies and is a co-founder of Alesman.

“Technology has become ubiquitous in our society as algorithmic capabilities expand and increasingly disruptive ideas are brought forth. Businesses, now more than ever, can take advantage of this technology in order to be increasingly efficient, improve quality, and reduce costs. Our products accomplish that and more

Alex Potamianos

His academic achievements have gone hand in hand with his extensive research work, receiving his M.Sc. and Ph.D. degrees in Engineering Sciences from Harvard University and later his MBA from the Stern School of Business, NYU.

Alex lives in Los Angeles where he enjoys kayaking and sailing.

Chief Scientist & Co-founder

Shri Narayanan

There is a lot that we can say about Shri, our Chief Scientist. In fact, there is an entire wikipedia page about his many accomplishments. He is a pioneer in human-centered information processing and communication technologies, with a special emphasis on behavioral signal processing and informatics.

Shri brings his vision to the team, encouraging new ways of thinking. He informs and inspires us to reach beyond what is possible today, setting new standards for tomorrow.

Granted, Shri is a very busy person, but in his leisure time he enjoys playing the citar.

He is a graduate, with an M.S. Engineering and Ph.D. degrees in Electrical Engineering, of the University of California Los Angeles (UCLA) and is an Andrew J. Viterbi Professor of Engineering at the University of Southern California (USC). Shri holds appointments as Professor of Electrical Engineering, Computer Science, Linguistics, Psychology, Neuroscience and Pediatrics and is the founding director of the Ming Hsieh Institute. Prior to USC, Shri was with AT&T Bell Labs and AT&T Research from 1995 to 2000. At USC, he founded and currently directs the Signal Analysis and Interpretation Laboratory (SAIL).


VP of Engineering

Nassos Katsamanis

Nassos is our tech lead and is based in Athens, Greece where he works with our global team of engineers. He is devoted to building cutting edge technologies into the company’s products and turn them into profitable real world solutions for our clients.

Nassos has conducted extensive research in behavioral signal understanding, working on his postdoc with Shri Narayanan at USC, LA. He is also an entrepreneur, having co-founded, the first voice-controlled apiculture application, and as its CTO, he brought the speech-enabled apiculture platform to market. Before that, he received the Diploma in ECE (with highest honors) and Ph.D. degree from the National Technical University of Athens (NTUA) in Greece. After his postdoc at USC, and 3 years thereafter, he was a Research Scientist at the Robotic Perception and Interaction Unit of Athena RC in Greece, working on (distant) speech recognition, gesture recognition, deep learning, audio saliency estimation and multimodal signal processing.

In his leisure time, he enjoys hiking, painting, and playing on a local soccer team.

Marketing Lead

Vicki Kolovou

Vicki is Marketing Lead at Behavioral Signals. Born in Australia but living between the UK and  Greece, Vicki is an expert in brand identity and digital marketing strategy, working with companies across many industries including tech, tourism, ehealth, food processing, fashion and furniture.
As a business woman, producer and active supporter of the startup ecosystem, Vicki has co-founded several successful ventures, including Tech Talks Central, a web radio platform that interviews technologists, scientists and researchers, broadcasting live from within tech events.

She loves meeting and talking with people from all over the world, and has a strong belief that you learn at every stage of the development process. Even from failures!

Director of Machine Learning

Theodoros Giannakopoulos

Theodoros is Director of Machine Learning at Behavioral Signal Technologies. Based in Greece, Dr. Giannakopoulos has multiple degrees, including a Ph.D in the department of Informatics and Telecommunications, University of Athens.

In addition to his work with Behavioral Signals, he is also a Research Associate in the IIT, NCSR.  He is the co-author of more than 70 publications in journals and conferences, and also co-author of the book “Introduction to Audio Analysis: A MATLAB Approach”.

His accolades include winning two best-paper awards at MMSP2007 and ICMLA2010, and being ranked in the top 0.5% of Python users according to He is an enthusiastic and active member of the open source community.

Senior Platform Engineer

Spyros Georgiladakis

Spiros is a Senior Platform Engineer at Behavioral Signal Technologies. Based in Greece, Spiros has a M.Sc. in Electronic and Computer Engineering from the Technical University of Crete. In addition to developing the Behavioral Signals platform, he is the Founder of web design and development company, Websphere.

His background includes working as a software engineer for Behavioral Informatix, and as a research assistant for the Technical University of Crete and the Athena Research and Innovation Center.

He also speaks Greek, English and Spanish!

Business Development Analyst

Maria-Anna Niforos

Maria-Anna is the Business Development Analyst at Behavioral Signals. She has worked in business, education and even translated an Academy of Athens’ award-winning historical book. Prior to her role in Behavioral Signals, Maria-Anna worked in the R&D and Project Management teams at Bloomberg LP in New York City and received her PMP certification while working there. On the education front, she has taught English and Science at various levels, including a stint as Undergraduate Lecturer of Biological Sciences Laboratory at Columbia University. She is a graduate of Columbia University (BA, MSc) and holds an MBA degree from the Athens Laboratory of Business Administration (ALBA).

Maria-Anna has a love for languages: she is fluent in English and Greek, speaks Spanish and basic French. She has also worked as a business coach and has a stellar 100% success rate of employment!

Senior Platform Architect

Spiros Dimopoulos

Spiros is a Senior Platform Architect at Behavioral Signal Technologies. Based in Greece, Spiros has over 10 years of IT experience and has worked in research projects funded by the EU and NSF in the roles of software developer and machine learning engineer. Prior to his position at Behavioral Signals he worked as an IT consultant to the University of Patras and the Aristotle University of Thessaloniki, as well as various private businesses.

When Spiros isn’t tinkering with small hardware/software integration projects using mobile electronics and sensors, he loves to do watersports, travel and post-process his photos of beautiful scenery!

Senior Machine Learning Engineer

Dogan Can

Dogan is a Senior Machine Learning Engineer at Behavioral Signals. Based in Los Angeles, he leads the automatic speech recognition research and development efforts in the company. He completed his PhD in Computer Science at the University of Southern California. His research interests include weighted finite-state automata, structured prediction models and neural networks, particularly in the context of speech and language processing.

Dogan is an avid coder and a big proponent of open source software. He is among the core developers of the open source Kaldi speech recognition toolkit and the creator/maintainer of PyKaldi, a Python scripting layer for Kaldi.

In his spare time, he enjoys traveling, hiking and playing board games.

Social Media Manager

Lila Stavropoulou

Lila is Behavioral Signals’ Social Media Manager. Based in Turkey, Lila is a Top50 Global Health Tech Influencer of 2017, and is a committee member of the European Health Parliament. Lila’s background includes working as a Global Business Intelligence Analyst for Genesis Pharma S.A. and as a Corporate Communication Consultant for Design Brothers, offering communication support for digital health startups.

She is a proud ambassador for the World Health Innovation Summit, an international platform set up to support health services while creating community value. 

Lila is a mentor and has devoted a lot of time to volunteering for worthy programs, events and organizations throughout her career.

Machine Learning Engineer

George Paraskevopoulos

George is Machine Learning Engineer at Behavioral Signals. He’s experienced in the cloud telecommunications domain and in machine learning. He’s also a PhD candidate on Multimodal Semantics using Deep Learning at the National Technology University in Athens.

When George is not working on his computer he loves to read, play his guitar or go hiking.

R&D Software Developer

Ledion Sotiri

Ledion is an R&D Software Developer at Behavioral Signals with an extensive knowledge of system analysis and software engineering for networks, including mobile communications. He’s also prolific in image and video processing. With a strong mathematical background, he excels in analytical thinking and probabilities analysis.

When Ledion is not tinkering away with writing code he loves to read about philosophy and psychology, interpreting human behaviors, while also looking up towards the stars in his spare time.

Machine Learning Engineer

Aggelina Chatziagapi

Aggelina is a Machine Learning Engineer at Behavioral Signals. She received her degree in Electrical and Computer Engineering at the National Technical University of Athens, Greece. The subject of her thesis was “Speaker Adaptation for Speech Emotion Recognition” under the supervision of Professor Alexandros Potamianos.

In addition to Machine Learning and Speech Processing, she also has experience and knowledge in Image Processing and Computer Vision.

Her hobbies are dance, both classical and contemporary, and she also likes photography and traveling.

R&D Software Engineer

Dimitris Mastrogiannopoulos

Dimitris is an R&D Software Engineer at Behavioral Signals with a strong set of skills software engineering,
embedded programming and audio signal processing engineering. When he’s not coding Dimitris plays his guitar or saxophone while often dwelling into audio processing with Pure Data and Max/MSP and photography.

VP of Analytics

Manolis Tsangaris

Manolis is based in Athens, Greece where he leads our product development and business analytics teams. He works directly with clients to understand their pains, workflow and iterate solutions with our engineering team based on our core technology. We call Manolis, our unconventional thinker., because he is not tied to mainstream thinking in order to create a solution.

His long time experience includes Chief Technology Officer & Architect at Sinartia Technologies and he holds a Ph.D. and a Master’s in Sciences in Computer Sciences from the University of Wisconsin-Madison and an Engineering Degree in Electrical and Electronics Engineering from the National Technical University of Athens. He has participated in two Silicon Valley Startups as a multiprocessing expert and Senior Architect, and two Boston based startups, as a technical leader and operations director. He has also contributed his technical leadership in two EU funded projects with the University of Athens, Greece. He has worked with  AT&T/Lucent Bell Labs from 1995 through 2001.

He holds two US patents in distributed multi processing for Electronic Design Automation and cell phone micro-location sensing.

Manolis loves to preserve traditional Greek music from his island home of Karpathos through recording, archiving and production.

UX Designer

Manos Kalaitzoglou

Manos has been working as a UX designer since 2006 creating solutions for clients like Microsoft, Facebook, the European Union and various tech start-ups. During 2016, he led a team of passionate UX designers for Digital A.I.R Innovation, an Augmented / Mixed reality start-up based in South East Asia. He is proficient in conducting design sprints, performing market analysis, user research, content strategy, information architecture flowcharts, wire frames, responsive mockups, functional prototypes and user testing sessions. Products he designed have been awarded by the Ermis, Social Media and Webit Awards and his work has been featured on and

When Manos is not designing products he can be found dabbling in film and game direction as well as screenwriting.

Machine Learning Engineer

Alexandra Chronopoulou

Alexandra is a Machine Learning Engineer at Behavioral Signals. She is interested in the field of Natural Language Processing which allows computers to extract meaning from human conversations and interpret the feelings of the speakers. She is working on her thesis in Transfer Learning from Language Models using Deep Neural Networks at the National Technical University of Athens.
When she’s not coding, Alexandra enjoys going to the cinema, listening to rock/jazz music and reading literature. She has learnt English, French, Spanish and some German in order to fully enjoy watching movies in their original version. She also loves to travel and play tennis.

Machine Learning Engineer

George Pantazopoulos

George received his degree in Electrical and Computer Engineering from the National Technical University of Athens, specializing in Speech Emotion Recognition. He’s now working with the Machine Learning Modeling team.

When George is not coding, he enjoys discovering new music, reading and travelling.

Machine Learning Engineer

Malvina Nikandrou

Malvina is interning at Behavioral Signals as a Machine Learning Engineer, while studying Electrical and Computer Engineering at the National Technology University in Athens.

Currently, she is working to complete her dissertation on Visual Question Answering.

In her spare time, she likes to practice yoga, learn foreign languages and watch documentaries.

Behavioral Data Analyst

Efi Arvaniti

Efi is a graduate of the School of Electronic and Computer Engineering, from the Technical University of Crete. Her diploma thesis is in the field of image and signal processing of medical images, titled “Quantitative Analysis of Spatial Profiles of Intensity in Dynamic Optical Signals: Applying to the Estimation of risk Transformation from Neoplasia into Cancer”.
In 2011, she received her Master’s Degree from the University of Ioannina, School of Informatics. Her master’s thesis is in electronics and power consumption of circuits during the testing phase of their production, titled “Scan Chain Partitioning for Low-Power Scan Testing”.
During her master studies, she worked for two semesters as an assistant in the Digital Design Lab at the University of Ioannina, Greece. She has received a certification diploma in education training. She has also worked in a specialized high school as a teacher of informatics in Thessaloniki. She also is a co-founder and partner of a computer and software business in Thessaloniki specializing in websites, web advertising, technology consulting, computer services and software development.
Efi works with Behavioral Signals as an Annotator. She speaks Greek, English and German.

Behavioral Data Analyst

Georgios Traianos

Georgios holds a BSc degree in Computer Science from the Aristotle University of Thessaloniki, Greece. His thesis was about Machine Learning, more specifically Multi-Label Classification, wherein he was required to study the subject from a theoretical point of view and eventually contributed code to the Mulan open source library. He continued his studies in Computer Science and acquired an MSc degree from the University of Bonn. The subject of his thesis concerned Machine Learning -“Signal Classification Based on Spectral ACF Features”. The task consisted of classifying audio signals based on whether they contain speech. The majority of his work was done in MATLAB, which included developing code and utilizing libraries for the specific purpose of the task.

In between his studies, he taught two training courses at a vocational training institute for a semester; one dealt with the basics of C programming language, the other with C++.

His pastimes include cycling, listening to lots of music (bitten by the jazz bug since his mid-20s), and as of late, attempting to study Aristotle’s “Politics”.

Machine Learning Engineer

Dimitris Sgouropoulos

Dimitris has a BSc Degree in Informatics and an MSc Degree in Signal and Information Processing and Learning. He’s working with the Machine Learning team at Behavioral Signals.

He has worked as a Research Assistant at the National Centre of Scientific Research “Demokritos” for the past 4 years in the field of Machine Learning with multimedia content.

In his spare time, Dimitris likes to relax by playing computer and board games with friends.

Behavioral Data Analyst

Polytimi Vintsilaiou

Politimi has a BSc Degree in Political Science and Public Administration, and she specializes in international affairs. She has worked as a political analyzer for independent research centers, dealing with international politics. She also contributes to the international affairs column, for the digital magazine Off Line Post, on issues related to international investments and energy.

She speaks Greek, English, French and is now learning German.

During her spare time, she likes running, loves to watch basketball, and is an avid traveler.

Our Investors

Kairos Ventures

Our Advisors

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