Blog
Guides and articles on CNPJ lookup, economic activities, company types and Receita Federal registration data.
Concepts
What is a CNPJ? A complete guide to Brazil's company registry
Understand what the CNPJ is, what it is for, how it is structured and how to look up data on any Brazilian company at the Receita Federal.
What is CNAE? Understanding Brazil's economic activity code
Learn what the CNAE is, how the classification of economic activities works, how the code is structured and how to find any company's CNAE.
Company types in Brazil: MEI, ME, EPP, LTDA, S.A. and more
Get to know all the company types in Brazil, their differences in size, legal nature and revenue limits, and which one fits each business.
CNPJ registration status: what each status means
Understand the 5 CNPJ registration statuses (Ativa, Suspensa, Inapta, Baixada, Nula) with the official Receita Federal codes and what each one means.
Legal nature: what it is and the types used in Brazil
Learn what legal nature (natureza jurídica) is, the most common types (Empresário Individual, LTDA, S.A., EIRELI), and how to look up any company's.
Simples Nacional: what it is, who can opt in, and how it works
Understand the Simples Nacional: Brazil's unified tax regime for ME and EPP, Annex I to V rates, how to opt in, pros and cons, and how to check enrolled companies.
Share capital: what it is, how to set it, and why it matters for your company
Learn what share capital is, how to set the right amount, how it differs from revenue and net worth, its role in tenders and credit, and how to look it up.
Brazilian ownership structure (QSA): how to look up a company's partners
Understand what the QSA is, which information is available, the types of partner qualification and how to look up the ownership structure of any Brazilian company on Inddex.
MEI vs ME: what the difference is and when to migrate
Compare Brazil's MEI and Microempresa in revenue, taxes, employees and obligations. Learn when and how to migrate from MEI to ME with a complete step by step.
Inova Simples: what the Simple Innovation Company is
Understand Inova Simples, Brazil's special regime for startups created by LC 167/2019 and LC 182/2021: simplified registration, angel investment, regulatory sandbox and how to look it up.
Tutorials
How to look up a CNPJ for free: 3 fast and reliable ways
Learn how to look up any CNPJ for free with up-to-date data from the Receita Federal. See registration status, partners, address and economic activity.
How to open a CNPJ: complete step-by-step guide for 2026
Complete guide to opening a CNPJ in 2026: required documents, step by step for MEI, ME, SLU, and LTDA, costs involved, and what to do after registration.
How to verify whether a company is trustworthy: a practical due diligence guide
Learn the 7 essential checks to assess whether a company is trustworthy before doing business: registration status, partners, CNAE, compliance, and more.
How to search for companies on Inddex: a complete feature guide
Explore every Inddex feature: search by CNPJ or name, advanced filters, Radar IA, a developer API, and premium data on Brazilian companies.
Inddex Radar: AI-powered company search
See how Inddex Radar uses artificial intelligence to find companies from natural language descriptions. Practical examples and usage tips.
How to register an Empresa Simples de Inovação (Inova Simples): a step-by-step guide for startups
A practical guide to registering a startup under Inova Simples via REDESIM: requirements, step by step, documents, costs, angel investment and regulatory sandbox.