| Baines & Herbert | — | — |
 BaixaCultura | — | 2008 |
| Balão Editorial | — | — |
| Bambual | Rio de Janeiro | — |
| Bandeirola | São Paulo | — |
| Barraco Editorial | São Paulo | 2023 |
| Bazar do Tempo | Rio de Janeiro | 2015 |
| Behold Studios | — | 2009 |
| Bennu | São Paulo | — |
| Benvirá | São Paulo | 2010 |
| Biblioteca Atena | — | — |
| Biblioteca Digital de Teses e Dissertações da USP | — | — |
| Biblioteca do Exército | — | — |
| Biblioteca Pública Estadual do Paraná | — | 1857 |
| Big Uncle Games | — | — |
| Blimunda | — | — |
| Bloch Editores | Rio de Janeiro | — |
 Bloomsbury Publishing Plc | Londres | — |
 Blucher | São Paulo | 1955 |
 Boitempo Editorial | São Paulo | 1996 |
| Bookerfield Editora | São Paulo | — |
| Bookmakers | — | — |
| Brasa Editora | — | 2021 |
| Brasil | — | 1822 |
 Brasiliense | São Paulo | 1943 |
| Brasoft | São Paulo | 1984 |
| Brazilian Association of Political Communication Scholars | — | — |
| Brazilian Association of Sanitary and Environmental Engineering | — | — |
| Brazilian Association of Sleep and Latin American Federation of Sleep Societies | — | — |
| Brazilian Information Design Society (SBDI) | — | — |
| Brazilian Journal of Development | — | — |
| Brazilian Political Science Association | — | — |
| Brazilian Society of Chemical Engineering | — | — |
| Brazilian Society of Endocrinology and Metabolism | — | — |
| Brazilian Society of Finance | — | — |
| Brazilian Society of Mastology | — | 1959 |
| Brazilian Society of Mechanical Sciences and Engineering | — | — |
| Brazilian Society of Plant Breeding | — | — |
| Briquet de Lemos | Brasília | 1993 |
| Buzz Editora | — | 2016 |