Kambourov & Partners provides clients with advisory services in major transactions in the TMT sector, and representation in contentious matters involving data protection, licensing and contract breaches. The group advises a number of media entities, in addition to major telecoms players and clients in software, IT services and cloud infrastructure. At the helm of the practice, Margarita Guigova is best known for her work representing media and entertainment clients in disputes related to broadcast licensing and TV and radio regulations. Yana Todorova is another key member of the team, and was made partner in April 2025.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- 'Kambourov & Partners’ TMT team combines exceptional legal expertise with a genuine understanding of complex technologies. They stand out for their ability to simplify complicated matters and provide clear, actionable advice. Highly tech-savvy and comfortable with cutting-edge software and telecom issues, they are an invaluable partner in technology-driven projects. The team brings together sharp legal skills, strong commercial awareness, and a commitment to delivering solutions that work in practice, not just on paper. Their responsiveness, proactive approach, and seamless collaboration with both technical and business teams set them apart from other firms in the market.'
- 'Kambourov & Partners’ TMT team is outstanding in every respect. They combine deep sector knowledge with the agility and creativity needed to advise on technologies that often outpace regulation. Their ability to provide clear, commercially grounded advice in areas where the law is still evolving is truly unique on the Bulgarian market. The team is equally comfortable handling complex regulatory frameworks and drafting forward-looking contractual arrangements that protect the client’s interests while enabling innovation to flourish. They are proactive, responsive, and highly collaborative, with a clear understanding of the challenges faced by fast-growing technology companies. Compared to other firms, they stand out for their capacity to translate complex legal requirements into actionable solutions that align seamlessly with business strategy.'
- 'The team provides prompt and high-quality services where the motivation of the lawyers and their level of expertise are constantly expressed. We assess the level of service as excellent and we emphasise that the answers to the legal questions were provided by Kambourov & Partners law office in due time. Responses were accurate and always provided in close cooperation with in-house lawyers of the company.'
- 'Yana Todorova is a brilliant lawyer who is always ready to support.'
- 'The entire TMT team at Kambourov & Partners impresses with its professionalism, technical fluency, and solution-oriented mindset. Within this group, Mario Arabistanov stands out as a remarkable advisor who combines deep legal knowledge with strong technical insight. He quickly understands complex issues, explains them with clarity, and always offers practical, forward-looking solutions. Mario is highly responsive, creative, and easy to work with. His calm, pragmatic approach inspires confidence and consistently adds value.'
- 'Yana Todorova brings an impressive skill set to the table. She excels at managing the contractual and operational aspects of innovative business models, ensuring that complex partnerships and agreements are structured with precision and foresight. Yana has a keen eye for detail and a deep understanding of how to make technology-driven ventures legally robust without stifling innovation. Her responsiveness, creativity, and ability to explain complex concepts in a straightforward manner make her an invaluable advisor for both management and operational teams.'
Key clients
- 24 Open Alliance for Creativity and Entertainment (ACE) Balkansat Broadcom Inc. Economedia Izabel Ovcharova - Izi Kapsch Trafficom AG Lidl Maternity Solutions Maxima Bulgaria Netinfo Nexo Nova Broadcasting Group (NBG) Prestige-96 Regiocom RM Equity Partners Schwarz Global Services Sofia Bar Association Vivacom VMWare Bulgaria
Work highlights
Advised 24 Open on the launch and operation of its fully automated business model.
Advises Nexo on data protection and compliance matters.
Advises Vivacom on a range of regulatory, corporate, litigation and competition matters.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Margarita Guigova
Other key lawyers
Yana Todorova; Mario Arabistanov