Our Services


The new regulation on data protection have been one of the biggest regulatory changes of the last decade.


we are your new legal partner, choose the package that best suits your needs.


CNMV or BdE (PFP, payment entity, ESI, aggregators, technology supplier) or not to obtain them!

Business law

In Cysae we want to be your legal partner so that you stop worrying about legal issues and you can pay attention to what really matters, your business.

Crowdfunding/ ICOS

Can I do an ICO / STO in Spain? The answer is yes. At Cysae we have experience in advising this type of projects that want to use this new methodology.

Another way of providing legal services.

Cysae is a firm specialized in legal advice on startups, fintech, data protection, technological law and legaltech.

We have a team of lawyers and technologists who, through the synergy of both areas, want to anticipate the needs of the sector.

Legal issue = Legal solution by legal means (yesterday)

Legal issue = Legal solution by technological means technological means (today)

Our Team

Enthusiastic professionals working every day to improve the legal sector

Tono Vázquez
Founder & Lawyer
Tono Vázquez

Tono, one of the founders of Cysae, specialises in IP and in advising technology-based and financial projects (fintech). His work includes the legal validation of different digital tools (SaaS, App, etc.) and knowledge of financial regulation. In addition, at Cysae we like everything related to technology law, which is why Tono has also worked on a large number of GDPR compliance projects.

Gonzalo García-Valdecasas Colell
Founder & Lawyer
Gonzalo García-Valdecasas

Gonzalo is a founding partner of CYSAE. He heads the Fintech and Corporate areas, having several years of experience in the field of information technology, blockchain, cybersecurity and financial and banking regulatory matters.

He is also a lecturer in the Master’s Degree in Intellectual Property and Technology Law at the International University of Valencia, as well as at the Business School of ISDE and EAE.

Law Degree from the University of Granada – Extraordinary Prize for Final Degree Project. MBA Programme at the Instituto de Empresa. Master’s Degree in Access to the Legal Profession and Master’s Degree in Entrepreneurship and New Technologies (both as number 1 of the promotion) from IE Law School. Specialisation Programme in Financial Markets Law from the Instituto de Estudios Bursátiles.

Fernando Tesón de Troya

Lawyer specialising in Blockchain and Cryptoassets with professional activity in the fields of Regulatory Compliance, Data Protection, Prevention of Money Laundering, Corporate Contracting, Financial and Banking Systems, Innovation and Project Management and Legal Teams.

Alberto L. Esteban Olarte

PhD in Legal Sciences from the University of Bologna and the University of Granada. Specialist in new technologies and, in particular, in the “crypto ecosystem”, actively participating in the consultancy and development of projects since 2018.

Javier Sillero Lobelos

Javier Sillero Lobelos graduated in Law from the Antonio de Nebrija University. He specialises in the prevention of money laundering and the financing of terrorism, with a special focus on the technology sector, digital assets and tokenisation.

Ramiro Abad González

Law graduate from Loyola University, in 22/23 he studied a Master’s degree in Legal Tech at CEU San Pablo University in Madrid. Specialised in the field of digital and AI law, as well as blockchain law.

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