Fluent in tax and AI.
Native in venture.
Cross-border tax and venture financing counsel for founders and the investors behind them. We know AI the way we know the tax code.
On the cover.
México’s legal press on the firm behind the GRC Engine.
Líderes Mexicanos · Abogados 2026
Two founders. One cover.
Líderes Mexicanos puts founding partners Víctor Aguirre and Carlos Aguerrebere on the cover of the 11th Abogados edition — the annual review that maps México’s legal structure — recognizing a new model of legal practice built on innovation. Twelve years advising venture-backed startups across two legal systems, from amparo wins to AI-run compliance.
“Impulso a las startups en crecimiento.”
- Edition
- Abogados: La Estructura Jurídica de México · 2026
- Cover story
- “Los socios legales de las startups” · Apr 2026
- In the press
- El Financiero — Reconocimiento al Liderazgo Jurídico 2026
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Two legal systems.
One GRC Engine.
Zero sleepless 16ths.
The Legal & Tax GRC Engine — Governance, Risk & Compliance, built and supervised by BlackBox lawyers — watches every obligation on both sides of the border, files what's due, and sends the evidence to your inbox. The 17th comes and goes; you hear about it in a report, not a midnight text. Controlled. Supervised. Off your mind.
We build AI you own. Or we run it for you.
Custom AI solutions for your legal & tax stack — contract intelligence, obligation tracking, entity management, compliance workflows — designed by our lawyers, trained on your entities and jurisdictions. Your team owns and runs the software.
The GRC Engine monitors every obligation of your Mexican subsidiary — SAT, IMSS, RNIE, AML/UBO, labor — and BlackBox lawyers review, file and sign. Your parent gets evidence on a US calendar: SOX sub-cert ready, FCPA books clean, screening logs on demand.
Not a chatbot.
A control tower.
Your Mexican subsidiary lives in one console: every obligation, deadline, credential and filing — with an alarm radar that escalates 🟢 1 month, 🟡 15 days and 🔴 1 week before anything is due.
↳ THIS ONE IS LIVE — CLICK THE MODULES.
Every obligation.
Both sides of the border.
11 HIGH-SEVERITY FLAGGED
DIOT · balanza día 3
ISSIF (CFF 32-H)
Dictamen SIPRED · CFDI 4.0
PTU · aguinaldo
Dictamen IMSS ≥300
REPSE / ICSOE
Master File + CbC 12/31
Anexo 9 DIM
Intercompany flows
Beneficiario Controlador
25% UBO (reforma 2025)
OFAC / FTO screening
Informativa día 10
Entero día 17
CFDI retenciones 5d
Actas · libros · PSM
Powers of attorney
Cap table vigilada
Informes trimestrales
Informe económico anual
Forma 96
FCPA books & records
CFDI ⇄ US GAAP
Evidence on US calendar
Four answers. Your obligation map, in seconds.
The same rule set the GRC Engine runs in production — pointed at a sketch of your Mexican subsidiary.
Weeks, not months. About 60 minutes of your time — the Engine and our lawyers do the rest.
Two governments. One controller.
Nobody shares a calendar.
Your parent runs on a quarterly close. Mexico runs on the 17th of every month. They were not designed to coexist, and the person standing between them is one finance lead in Mexico City.
Nothing falls due.
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Nothing falls due.
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Deadlines shown for a December fiscal-year-end issuer with a Mexican operating subsidiary. Mexican dates recur monthly unless noted; U.S. dates assume large-accelerated-filer timing. Your calendar will differ — that is the point of the assessment.
Full-service since 2014. We negotiated the first ride-sharing regulation in Latin America — and closed Jüsto's Series A, the largest in Latin American history.
The GRC Engine isn't a startup experiment — it's a decade of US–LATAM practice, compiled. As counsel to Cabify we obtained the amparo against Mexico City's taximeter rule and annulled PROFECO's millionaire fine. Nine practices stand behind every filing.
The counsel VCs point their portfolio companies to.
A clean company is an easier investment. Funds send us the founders in their portfolio expanding into Mexico — because we build the corporate hygiene diligence re-opens, and give the GP one bilingual team accountable on both sides of the border.
Clean cap tables, complete IP assignment and valid corporate books — the schedule your term sheet re-opens, built right the first time.
US parent and Mexican subsidiary under one bilingual firm — no coordinating two counsels across a language and a legal system.
The Engine keeps the Mexican sub audit-ready on a US calendar — so portfolio reviews and the next round start from a clean file.
