International dispute resolution — no more, and no less. We do arbitration, litigation, mediation & more.
We are a team of seasoned lawyers, focussing on the specificities of your particular case. We offer a lean structure with partner involvement and put clients' interests first. We find solutions with you, step by step.
Our History
2025 — Founded
Founded in 2025 by dispute specialists Anna Masser and Dr. Simon Manner, manner | masser is a unique alliance of big law practice and in-house experience. That rare combination defines our perspective — we understand the commercial logic behind your dispute.
Our practice
Our practice has a singular focus: dispute resolution in all its forms. We specialize in arbitration, litigation, mediation and adjudication, while still leaving room for creativity. manner | masser is regularly engaged in complex international arbitration and high-value cross-border litigation. We advise across the full lifecycle of a dispute, from early strategy to final resolution, with particular experience in energy, construction, commercial, and post-M&A disputes. Our team is trained in both civil and common law traditions, enabling us to navigate the legal, linguistic, and cultural complexity of cross-border disputes with finesse.
Frankfurt & Hamburg
We operate from Frankfurt and Hamburg across multiple jurisdictions, supported by an established international network of the best independent specialists. Our boutique structure means we are not constrained by conflicts of interest, internal referral requirements, or rigid processes. We work for you.