Víctor Lázaro Jiménez
Marketing Director
Designs the communication and positioning strategy that brings our services to crypto investors across Spain.
Specialists in reconstructing blockchain portfolios
We are a technical team specialising in analysing and rebuilding crypto activity. We trace on-chain transactions, reconcile data across exchanges and produce accurate reports so you can meet your tax obligations.
Specialists in reconstructing blockchain portfolios
We are a technical team specialising in analysing and rebuilding crypto activity. We trace on-chain transactions, reconcile data across exchanges and produce accurate reports so you can meet your tax obligations.
Specialists in reconstructing blockchain portfolios
We are a technical team specialising in analysing and rebuilding crypto activity. We trace on-chain transactions, reconcile data across exchanges and produce accurate reports so you can meet your tax obligations.
Our team
The people behind your reports
Professionals who live in the detail: we analyse portfolios, produce reports and answer crypto tax questions every day.
Alberto Lázaro Jiménez
Sales and People Director
Leads the commercial team and looks after the people inside it. Your first point of contact for questions and a smooth experience.
Rafael González López
Operations and AI Director
Oversees the analysis processes and applies artificial intelligence to speed up portfolio reconstruction and report generation.
Martín González López
Chief Technology Officer
Builds and maintains the technical platform. Responsible for the stability, security and efficiency of the analysis system.
Carlos González Matas
Blockchain Legal Specialist
Registered filing agent responsible for submissions to the Spanish tax authority. Advises on the legal and regulatory side of crypto assets.
Fernando García Ortiz de Landaluze
Client Support
Accompanies each client through the whole process. Answers questions, coordinates deliveries and keeps communication clear and close.
Antonio Núñez
Blockchain Reconstruction Technician
Specialist in on-chain tracing. Analyses and rebuilds complex activity across multiple networks and DeFi protocols.
Antonio Jesús Jiménez
Blockchain Reconstruction Technician
Specialist in on-chain tracing. Analyses and rebuilds complex activity across multiple networks and DeFi protocols.
Our vision
Why we exist
We turn real experience with crypto into knowledge that is useful, applicable and close at hand. No empty theory, no generalities that help nobody.
We started because we saw a problem: crypto investors abandoned when it came to tax. Traditional advisers who do not understand DeFi. Automated tools that generate errors. And a tax authority paying closer attention every year.
We built colvence to be the bridge: we combine deep tax knowledge with hands-on experience in the crypto ecosystem. We are not a piece of software that leaves you alone with a CSV. We are specialists who understand your portfolio.
+500
Satisfied clients
+1.200
Reports delivered
+900
Exchanges supported
What we stand on
01
Clarity
We turn tax complexity into reports you can actually read. No unnecessary jargon, no ambiguity. Every figure and every calculation explained so that you and your adviser both follow it.
02
Usefulness
We do not produce PDFs that gather dust. Every report is built to be used directly: ready for the tax authority, importable into your accounts, actionable from minute one.
03
Support
We do not leave you alone with a file. We go through your situation together, answer your questions, and if your adviser has any, we speak to them directly. We stay to the end.
Shall we start?
Ready to put your crypto tax in order?
Tell us your situation, no strings attached. We look at your case and tell you exactly how we can help.
Free consultation
Reply within 24h
100% confidential