Ardevie & Kaaviar PR are leading global PR, branding and marketing sister agencies, based in Switzerland and the United States. 

Our methodology encompasses a comprehensive 360-degree approach, covering public relations, branding, marketing strategy, media consulting, elite business matchmaking, and event conceptualization, tailored to engage and cater to Ultra / High Net Worth Individuals.

We take pride in delivering outcome-driven, bespoke services. Through close collaboration with our clients, we craft compelling messages and experiences, ensuring their narratives resonate with both current and prospective audiences across appropriate platforms and timing.


We’re deeply committed to the brands we partner with, immersing ourselves in their ethos even prior to formal collaboration. Why? Because our team has over a decade of experience working on the brand side and we ‘get it’.


We personalize branding and communications to your unique perspective. Collaborating closely, we uncover your identity, desires, and distinct needs. From there, we create tailored solutions to elevate your brand, delivering tangible results for HNW and UHNW audiences.


We exclusively collaborate with individuals and brands aligned with our core values, ensuring mutual success. Our belief in this synergy translates into tangible benefits for you.

Ariana Sellefyan

Ariana Sellefyan, a Geneva, Switzerland native, has cultivated her communication and business development expertise across diverse sectors, including private aviation, commercial airlines, emerging economies, and oil and gas. With a global network spanning the luxury watch, private banking, yachting, jewelry, and hospitality fields, Ariana excels at collaborating closely with clients worldwide to discern their business needs, aspirations, and preferences.

A passionate brand advocate, her forte lies in orchestrating strategies to elevate brand visibility, reputation, engagement, and sales, alongside adept management of media planning, public relations, and strategic partnerships. Through her adeptness at VVIP event introductions, conceptualization, and discreet organization, Ariana fosters enduring relationships between brands and their target audiences. Clients appreciate Ariana’s instinct for business matchmaking, streamlined service delivery, integrity, transparency and ability to achieve results within budget constraints. Having lived and worked in New York, Geneva, London, Dubai, Lagos, Casablanca, Tunis, and Istanbul, she possesses unparalleled proficiency in managing intercultural relations at the highest echelons.



In 2017, Ariana founded MediAS Solutions, later rebranded as Ardevie in 2020, to specialize in global marketing and business development consulting. Concurrently, she formalized a long-lasting partnership with New York-based sister agency Kaaviar PR, synergizing efforts to cater to luxury segment clients targeting a high-net-worth global audience, focusing on the US and Swiss markets. Additionally, she collaborates with Swiss House of Brands, driving company regeneration through hybrid brand strategies for the digital economy and sustainability transitions.

Present and past work includes collaborations with prestigious brands and companies such as Frédérique Constant, Alpina, Backes & Strauss, Cartier, IWC, Blancpain, Harry Winston, EBACE, Jet Aviation, Fleming, Ineichen Auctioneers, Franck Muller, Spafax, Chopard, Tissot, Richard Mille, Louis Moinet and Swissport Executive SAS.

“Ariana is a power of energy whose universal consciousness certainly comes from the diversity of her origins. As a citizen of the world, she always knows how to find creative solutions to reach her goals.” Chantal Baer

Key Partners

Experts team

Laetitia Hirschy

Founder & CEO Kaaviar PR

Chantal Baer

Co-Founder & Associate of Swiss House of Brands

Marine Gruaz-Rébuffat

Co-Founder & Associate of Swiss House of Brands

Ardevie and Ariana’s References


“We have worked with Ariana for 4 years and it has been a real pleasure benefiting from her expertise of brand image building in Private Jets Airports. 
Ariana’s strong involvement in both the implementation and follow up of the campaigns but also her, have been truly appreciated by the entire team.
We would be more than delighted to continue working with Ariana on these projects but also new ones. 
Her dedication to the Maisons projects and positive energy definitely made a difference in the way these campaigns were implemented. 
We look forward to an extended collaboration with her!”
Amélie Delacour & Sofia Nehaoua

Head of Communications & Head of Brand Content, Cartier Middle East & India

« Ariana’s dedication, positivity and commitment are just a few of the many attributes, which make it a real pleasure to work with her. Her wealth of knowledge and network across many luxury brands, especially in the watches and jewellery sector, understanding of global market strategy and UHNW audiences, have enabled us to successfully partner across a number of global travel media partnerships. Those partnerships have been across some of the most premium commercial airlines, including Emirates, Singapore Airlines and Air Canada to mention a few, across the Spafax portfolio. Through her network she built from scratch and maintained existing partnerships for some of the world’s most top luxury brands across Switzerland, Germany and Benelux and across media platforms including digital, print, inflight tv, ooh, product placement and experiential activations, targeting UHNW and HNW audiences. Ariana’s understanding of our products and her strong relationships with clients, were key to the success of our partnership together, she is a true professional luxury global media expert. Ariana is a great strategist and team player, and her client skills and communication are truly professional. We have always enjoyed working with Ariana and her hard work was always noticed by all members of our team. We very much look forward to partnering with Ariana in the near future. »

Tullia Vitturi di Este-Lochra

Head of Global Media & Brand Partnerships, Luxury & Lifestyle , Spafax UK

“Ariana has a deep knowledge of the global world of luxury. She has helped us communicate our brand and target key UHNWI globally through various targeted multi-channel media campaigns, partnership strategies and VIP matchmaking. Ariana’s enthusiasm, dedication, passion and vast experience in the luxury industry and in particular the Watch & Jewellery segment, makes her a true expert in her field. As a citizen of the world, a polyglot, she was able always to find the right strategy and creative solutions tailored to our specific needs.  Her natural communication and PR skills gives her a very strong advantage. Working with her has always been a pleasure and each project has been an impeccably mapped journey. I would absolutely recommend her to any luxury brands. We very much look forward to collaborating with Ariana and Ardevie on some new upcoming projects.” 

Vartkess Knadjian

CEO and Owner, Backes & Strauss Luxury Watches and Jewellery AG

“It’s always a pleasure to work with Ariana! We have collaborated strongly together on various media projects and event organization, from first ideas to actual launch, for the most high-end jewelry and watch brands within our Swissport Executive Aviation Private Jet Terminal in Nice. Every single project we have worked on was handled to absolute perfection, thanks to her natural professionalism, pro-activity and high organizational skills. She truly understands our highly demanding and international audience mindset, which is key in our industry. Ariana’s strong knowledge and network within the luxury and private aviation industries are the foundation of her success. As a very talented UHNW focused media executive, Ariana’s positive energy and enthusiasm has always been appreciated by all of our team members. I look forward to future potential collaborations with Ardevie.”

Rafaël Fromentin

FBO Director / Aéroport Nice Côte d’Azur, Terminal Aviation d’affaire , Swissport Executive SAS

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