Tax intelligence built by people who live B2B
Mastery B2B Tech was born from the real experience of operating industrial e-commerces. We turn Brazilian tax complexity into a real-time calculation engine, native to B2B.
Built inside the problem
Founded in 2025 by operators with more than 15 years in B2B e-commerce, technology and taxes, Mastery understands the impasse that other tax engines don't solve: B2B e-commerce needs a correct price at checkout, in milliseconds, with all rules, exceptions and benefits applied.
We started as an internal project for an industrial hub. In less than a year, the engine was running millions of calculations in production, with no downtime and latency below 200ms. That's when we decided to turn the technology into a platform.
What Mastery believes in
We exist to eliminate tax complexity as a barrier for Brazilian B2B e-commerce. We deliver real-time tax intelligence because we believe no order should be blocked because of taxes. Our ambition is to be the native tax layer of every B2B e-commerce in Latin America, with full coverage of the Tax Reform. We build with technical clarity, traceability in every decision, long-term partnership and an obsession with real time.
Who leads Mastery
Mastery was co-founded by two operators with complementary backgrounds in technology, taxes and B2B e-commerce.
Gustavo Assafir
Spent many years running a consultancy for large e-commerce operations. He led marketing and sales at Brazilian and international companies. Today he is co-founder of Mastery B2B Tech, responsible for commercial strategy and go-to-market.
LinkedIn
Caio Costa
Extensive experience as a technology leader at large national industries. Today he is co-founder of Mastery B2B Tech, responsible for the architecture of the calculation engine and the platform's technical strategy.
LinkedInReady to automate your tax operation?
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São Paulo, SP, 04729-080