Welcome to the heart of a unique agency, designed to simplify your process and exceed your expectations.
Because every customer is different, we're committed to finding the solution that's right for them. Whether you want to invest your savings, build an investment strategy or realize a life project, we offer a tailor-made service.
We support you with care and enthusiasm at every stage of your project.

Twixy reflects the vision and values of its founder, a key player in the real estate industry. With over 20 years' experience in the real estate and construction sectors, she brings professionalism, passion and innovation to every project.
Her solid expertise, backed by a federal diploma in real estate brokerage, is combined with a natural talent for showcasing and communication strategy, always at the service of her customers.
Well-rooted in the Valais landscape, Sandra is known for her attachment to the canton, which she expresses through her activities in the mountains. She is also appreciated for her natural warmth, her curiosity about others and her ability to create genuine bonds.
Her passion for real estate brokerage is based on essential values: a personalized approach to each customer, meticulous attention to detail, total transparency and solid knowledge of the local market.
A team at the heart of success
Under her leadership, Twixy combines expertise, proximity and dynamism to bring every real estate project to fruition.
Sandra attaches particular importance to her employees, whom she supports in a rewarding environment based on genuine human relations and ongoing training.
In this stimulating and nurturing environment, each employee is able to express his or her full potential.
It's this philosophy that makes Twixy so much more than just an agency: a trusted partner that places people, passion and excellence at the heart of its business.
Professional and committed to the success of your projects, our employees place each customer's objectives at the heart of their approach.
Based in the heart of the Valais region, the agency relies on a solid network and favors a human, professional and ethical approach to real estate sales. Backed by their regional roots, our staff put their local expertise and integrity at the service of your projects.
Twixy, a team that builds with you!
Thanks to a personalized, human approach, we transform real estate brokerage into an experience of trust and quality.
Sandra RouillerDriven by action and bold initiatives, Sandra moves forward with a simple conviction: ambitious projects deserve to be pursued wholeheartedly. Trained in civil engineering, holder of a Swiss federal qualification in real estate and also active in professional training, she has built her career around a solid command of the profession and a constant desire to progress.
An entrepreneur at heart, she enjoys creating, structuring and moving things forward. Her energy is fuelled by challenges, new ideas and encounters, together with an ability to question what already exists whenever she believes it can be improved.
Demanding both in substance and in approach, she places as much importance on the result as on the path taken to achieve it. Understanding the issues at stake in a project, advising with candour and defending her clients’ interests are all part of her vision of professional and committed support.
With Twixy, Sandra is building far more than an agency: an ambitious team and a new generation of real estate brokers, around a form of brokerage founded on integrity, ambition and a human approach.
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Alexandre CoupinAlexandre has been working in real estate for several years, with an approach rooted in experience, commitment and a practical understanding of the market. His career has enabled him to develop a keen understanding of his clients’ expectations and of the specific challenges involved in each project.
Before entering real estate, he worked in renowned fine-dining establishments, where he developed a strong sense of service, high standards and attention to detail. His meeting with Sandra in 2017 marked a turning point in his career and paved the way for a lasting professional collaboration.
Attentive, rigorous and deeply committed to human relationships, he genuinely takes the time to listen to and understand his clients. He favours transparent, ethical and unhurried support, convinced that trust is built as much through the quality of advice as through clear communication.
At Twixy, Alexandre brings his experience and strong sense of service. Fully committed to every project, he defends his clients’ interests to the best of his ability and supports them with exemplary professionalism.
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Mauranne ClavienWith more than ten years of experience in administrative roles within various real estate agencies, Mauranne knows the day-to-day realities of an agency inside out. She likes things to move forward, files to be properly followed up and everyone to be able to rely on a dependable organisation.
A mother of three, she has developed a keen sense of priorities and a genuine ability to handle several matters at once without losing track. Naturally organised, she also appreciates straightforward exchanges, friendly atmospheres and sincere human relationships.
Available, reliable and committed, she makes sure she provides clear and effective answers. Her rigour is matched by genuine cheerfulness, enabling her to handle requests professionally while remaining approachable and warm.
At Twixy, Mauranne brings versatility, reliability and an in-depth knowledge of how a real estate agency operates. Her work makes everyday life easier for the team and directly contributes to the smooth handling of files and the quality of support provided to clients.
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Yvan BovioActive for several years in both real estate and training, Yvan stands out for his calm manner, discretion and analytical skills. Pragmatic and methodical, he approaches each case with perspective and precision in order to understand its challenges as a whole.
Involved in various cultural and sports associations in the Sierre region and on the Haut-Plateau, he values interaction and human relationships. His warm manner and ease in connecting with people allow him to create a climate of trust naturally.
Rigorous and attentive, he takes the time to listen to his clients and understand their project as a whole. He looks beyond the transaction itself: objectives, constraints, personal circumstances and future prospects are all factors he integrates into his analysis and advice.
At Twixy, Yvan brings his experience, analytical skills and knowledge of the regional economic landscape. He puts these qualities at the service of his clients with professionalism and sound judgement, helping them make considered decisions and move their projects forward with confidence.
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Sophie RobreteauWith solid experience in sales, Sophie has an excellent understanding of the expectations of the Valais market. Dynamic and always smiling, she enjoys taking on challenges and, above all, succeeding in them. Her positive nature and strong interpersonal skills quickly create a relationship of trust.
Coming from a family of retailers, she grew up in a customer-focused environment. Passionate about real estate and interior design, she pays particular attention to detail. A lover of the mountains, she also enjoys returning to them whenever she has the opportunity to recharge.
Rigorous, patient and demanding of herself, she places listening and understanding her clients’ needs at the heart of every project. She remains consistently committed to providing attentive, precise and high-quality support.
At Twixy, Sophie brings her energy, commercial instinct and high standards. Her commitment and closeness to her clients enable her to build lasting relationships of trust and see each project through with dedication and professionalism.
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Paul GarciaHolding a master’s degree in business studies, Paul has built a diverse career spanning civil engineering, banking, investment funds and business development within an SME active in artificial intelligence. These experiences have strengthened his analytical mindset and his understanding of economic issues.
Curious and rigorous, he has been passionate about property investment on a personal level for several years. This experience, combined with his desire to support others in important decisions, naturally led him towards real estate brokerage.
A good listener who values fairness in human relationships, he combines high standards, clear judgement and a strong sense of service. For him, every project goes beyond the transaction itself: it requires understanding, reflection and support tailored to each person’s specific circumstances.
At Twixy, Paul brings his analytical perspective, rigour and a structured view of real estate projects. He puts these qualities at the service of his clients to help them make informed decisions and move forward with confidence through the stages that matter.
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Tim BrandtWith a rich and demanding background, Tim draws on solid hands-on experience and a keen understanding of the expectations of those he works with. Ambitious and determined, he approaches every project with seriousness, consistency and the determination to see it through.
Open-minded, he takes an interest in a wide range of subjects, from travel and sports news to cultural discoveries. This curiosity broadens his perspective, strengthens his adaptability and helps him understand very different personalities and expectations.
Deeply respectful of others, he places great importance on the quality of relationships and trust. His resilience enables him to stay the course when difficulties arise and to approach each situation with perspective, commitment and perseverance.
At Twixy, Tim brings his ambition, determination and interpersonal skills. He puts these qualities at the service of both the team and his clients, with a constant desire to move every project forward with respect, high standards and commitment.
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Sophie BatelSophie forged her character where few venture: at the highest level of competitive sport. French table tennis champion and French duathlon vice-champion, she developed qualities that are reflected in every assignment she takes on: rigour, perseverance and the ability to perform consistently over time.
With a degree in sports science and experience in management and business administration, she knows where she is going and how to get there. She approaches every case with a clear objective, a rigorous method and the practical means to achieve it.
What drives her in real estate is above all the human dimension. Understanding a life project, building a relationship of trust and being fully involved so that every stage can be completed with peace of mind. For her, the client relationship is not an accessory; it lies at the heart of her commitment.
At Twixy, Sophie brings a rare combination of performance and humanity. She puts her determination at the service of both the team and her clients, helping each project move forward with method and confidence.
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