Managing Partner
Raphael A. Kleinmann
Raphael A. Kleinmann is recognised by his clients for his attentive listening, his ability to quickly identify the core issues at stake, his sharp analysis of comp
See more InformationsWho we are
We are an ADR-focused firm specializing in mediation, arbitration, and negotiation, composed of law-trained professionals serving exclusively as neutrals. We provide a clear, efficient, and proportionate process to resolve complex disputes-without representing any party or providing legal advice.
Our values, our commitments
Discover KAYSE' strong convictions for support that reflects your image.
Thomas Crum
The quality of our lives depends not on wheather or not we have conflicts, but on how we respond to them.
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Neutrality
No side, no bias, no agenda. In mediation and arbitration, we do not serve one side or another, we serve the integrity of the process. With independent judgment, candor and unwavering professionalism, our neutrals ensure that every outcome is based on merit, fairness and trust.
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Confidentiality
What happens at the table stays at the table. We handle information with the highest level of care, in line with applicable rules and the parties’ agreements. A well-structured confidentiality framework encourages more open discussion, allows options to be explored without unnecessary exposure, and supports realistic solutions.
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Transparency
No hidden agendas, no surprises. We keep our clients informed at every stage of the process : from the strategy we recommend to the fees we charge. Clear communication builds trust, and trust builds better outcomes.
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Efficiency
Time is money. We save you both. Disputes should not take years to resolve or drain your resources. We design every process to be thorough enough to protect your interests, yet streamlined enough to get you from conflict to resolution as quickly as possible.
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Resolution-Driven
We do not exist to prolong disputes, we exist to end them. Every decision we make is guided by one objective: finding a practical, lasting solution. Litigation creates winners and losers. We create outcomes that move everyone forward.
The mission of Kayse
Neutrality. Expertise. Efficient Resolutions
Located in the heart of New York, our company offers its expertise to provide rigorous, humane, and committed support. All mediator, arbitror and negotiator are legally trained professionals with deep experience in complex domestic and international disputes.
Legal expertise is applied in a neutral, independent, and non-representative manner for our mediation and arbitration services. As mediators and arbitrators, we bring the highest standard of impartiality to every case, ensuring that each party’s interests are fully understood and fairly considered. Our proven track record of resolving complex disputes efficiently and equitably makes us the trusted choice for Companies, entrepreneurs and private clients seeking reliable and definitive outcomes.
Our specialised negotiation team brings together the finest professionals in the field, combining advanced negotiation techniques with high-level legal expertise. Their cross-sector knowledge enables them to support clients effectively across all industries. One single objective: reaching a balanced, timely, and lasting agreement.
Our experts do not provide legal advice and do not represent any party.
Our Story
Excellence. Integrity. Precision
Kayse was born from a deep commitment to integrity, high standards, and dispute resolution.
From the outset, our ambition was clear: to build a firm capable of delivering fair, controlled, and effective solutions to the most sensitive matters.
To bring this vision to life, we made a strong choice: to surround ourselves with the best professionals in their respective fields of expertise. Trained across the world, our team brings together diverse backgrounds, methods, and complementary skill sets, all driven by the same pursuit of excellence.
Kayse was therefore built around one clear idea: to offer every client a precise, controlled, and results-driven approach, both nationally and internationally.
Our ADR team
Our team is composed of professionals with formal legal training. United by a shared commitment to independence and legal rigour, they bring a single-minded focus to the management and resolution of disputes.
Do you have any questions ?
At KAYSE, transparency and accessibility are our priorities. We are here to answer your questions as clearly as possible.
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Yes, via video conference or in a hybrid format. Practical safeguards are used to protect the integrity of the process.
For more information, fill the form.
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It depends on preparation and the number of issues involved. Some cases resolve in a single day, while others require several sessions. The goal is always a process that is efficient and proportionate.
For more information, fill the form.
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Thanks to the varied backgrounds and specialisations within our team, we operate across all sectors – torts, finance, real estate, energy, technology, healthcare, manufacturing, and international trade. Whatever your industry, we have the expertise to understand your challenges.
For more information fill the form.
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Our team is multilingual. Our professionals are able to conduct proceedings in several languages, which is a critical asset in international disputes involving parties of different nationalities.
For more information fill the form.
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Costs depend on the nature of the dispute and the process selected. ADR is generally less expensive than litigation. We are transparent about our fees from the outset. Contact us for a tailored quote.
For more information, fill the form.
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Court proceedings are often lengthy, expensive, and public. ADR offers a private and efficient path to resolution. It also gives the parties greater control over the process and the outcome.
For more information, fill the form.
They chose KAYSE
Immerse yourself in the captivating world of our specialized blog, an inexhaustible source of exclusive information and legal developments.
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Expertise you can trust
“We highly appreciate the work carried out by Kayse during our dispute resolution process. Their expertise in arbitration, mediation, and negotiation was evident throughout. Their professionalism and commitment exceeded our expectations.”
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Strategic advice that delivers results
“Kayse provided thoughtful and strategic advice throughout a demanding negotiation. They listened carefully, anticipated potential difficulties, and helped us achieve a fair and sustainable agreement.”
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Outstanding arbitration support
“We would like to thank the Kayse team for their excellent assistance during our arbitration proceedings. Their strategic approach, responsiveness, and attention to detail gave us confidence throughout the entire process.”
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Highly recommend
“Kayse guided us through a complex mediation process with professionalism, patience, and clarity. Their ability to listen to every party and identify practical solutions made a real difference. We are truly grateful for their support.”
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Discreet and solution-focused
“We sincerely thank Kayse for their professionalism and discretion. Their negotiation skills helped us resolve a sensitive matter while preserving an important business relationship. The outcome was constructive and satisfactory.”
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Reliable and highly experienced
“Kayse supported our company during an important arbitration matter with precision and commitment. Their clear communication and thorough preparation were greatly appreciated. We felt supported at every stage.”
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Excellent mediation services
“The mediation services provided by Kayse were exceptional. They remained neutral, respectful, and focused on finding a workable solution for everyone involved. Thank you for making a challenging situation much easier to manage.”
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Professional from start to finish
“Kayse demonstrated outstanding professionalism from the beginning. Their team was well prepared, attentive, and highly effective during the negotiation process. We would gladly recommend their services.”
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Exceptional dispute resolution expertise
“We are extremely thankful to Kayse for their support in resolving a difficult commercial dispute. Their expertise in arbitration and negotiation helped us move forward efficiently and with greater peace of mind.”
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A professional and reassuring team
“Working with Kayse was a very positive experience. Their team explained each stage of the mediation clearly and created a constructive environment for discussion. Their calm and solution-focused approach was invaluable.”
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Skilled and effective negotiators
“Kayse handled our negotiations with great skill and professionalism. They understood our priorities, protected our interests, and helped us reach a balanced agreement. We highly appreciate their dedication.”
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Clear, efficient, and practical
“The Kayse team combines legal expertise with a practical understanding of business realities. Their guidance during our mediation was clear, efficient, and reassuring. We are very grateful for their assistance.”
