| 1000043896 | LaterationXYZ GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Baden-Württemberg | |
| 1000041359 | LEAGUES GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Baden-Württemberg | |
| 1000044907 | LEAM Technologies GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000042717 | Leasi AS | NO-Norway | Company | No | Alumnus | ESA BIC Norway | |
| 1000045668 | Lederer Peter Dipl.-Ing. | AT-Austria | Company | No | Incubatee | ESA BIC Austria | |
| 1000013620 | LENS RESEARCH AND DEVELOPMENT | NL-Netherlands | Company | No | Alumnus | ESA BIC Noordwijk | |
| 1000042667 | LEOBLUE | FR-France | Company | No | Incubatee | ESA BIC Sud France | |
| 1000043583 | LETO SPACE GmbH | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000032288 | Let's Earth s.r.o. | CZ-Czech Republic | Company | No | Alumnus | ESA BIC Czech Republic | |
| 1000037874 | LEVITY UG (limited liability) | DE-Germany | Company | No | Alumnus | ESA BIC Northern Germany | |
| 1000047798 | LEXION Ι Κ Ε | GR-Greece | Company | No | Incubatee | ESA BIC Greece | |
| 1000041807 | LIDAX ELECTRO-OPTICAL SYSTEMS S.L. | ES-Spain | Company | No | Incubatee | ESA BIC Madrid Region | |
| 1000040861 | lifeline | BE-Belgium | Company | No | Alumnus | ESA BIC Belgium | |
| 1000030337 | LIFT ME OFF LIMITED | GB-United Kingdom | Company | No | Alumnus | ESA BIC UK | |
| 1000046738 | Lightnovo ApS | DK-Denmark | Company | No | Incubatee | ESA BIC Denmark | |
| 1000045431 | limknow GmbH & Co. KG | DE-Germany | Company | No | Alumnus | ESA BIC Baden-Württemberg | |
| 1000045064 | LirOptic Limited | IE-Ireland | Company | No | Incubatee | ESA BIC Ireland | |
| 1000044240 | LOKORA GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Baden-Württemberg | |
| 1000033894 | L-One Systems GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Hessen | |
| 1000043866 | Ludifica srl | BE-Belgium | Company | No | Alumnus | ESA BIC Belgium | |