| Akademia Podlaska w Białymstoku | |
| Akademia Polonijna w Częstochowie | Silesian |
| Akademia Sztuki w Szczecinie | |
| Akademia Teatralna im. A. Zelwerowicza | |
| Akademia Techniczno-Artystyczna Nauk Stosowanych w Warszawie | |
| Akademia Techniczno-Informatyczna w Naukach Stosowanych | |
| Akademia WWW | Masovian |
| Akademia Wychowania Fizycznego im. Bronisława Czecha w Krakowie | |
| Akademia Wychowania Fizycznego im. E. Piaseckiego w Poznaniu | |
| Akademia Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach | |
| Akademicka Liga Startupów | |
| AKBIT | Masovian |
| Akcelerator Innowacji NOT Sp. z o.o. | |
| Akcelerator Technologiczny Gliwice ASI Sp. z o.o. | |
| Akredo.pl | |
| Akrosoft | |
| Aksan | Greater Poland |
| Aksonet Sp. z o.o. | Greater Poland |
| ALDEA IT Consulting Sp. z o.o. Sp. k. | Greater Poland |
| Alfa-Net | |
| Alfa-System | Silesian |
| Alfabeat | Pomeranian |
| Alfabet Sukcesu | |
| Algorytm S.C. | Lesser Poland |
| Aligo VC | |
| Alior Bank S.A. | Masovian |
| Alkom | Lesser Poland |
| All in! Games | |
| All4affiliate.pl | Masovian |
| Allegro Tech | |
| ALLEX Z.K.U.I. | Lower Silesian |
| ALLNET.PL | |
| Alltech S.J. | Masovian |
| Alltrim Sp. z o.o. | Greater Poland |
| ALM Services Technology Group | |
| Almar IT Sp.z.o.o Sp. K. | Silesian |
| Alnet Systems Sp. z o.o. | Pomeranian |
| Alphamoon Sp. z o.o. | Lower Silesian |
| AlphaNet Sp. z o.o. | Silesian |
| ALSO | Greater Poland |
| Altab.pl | Silesian |
| Alte Media | Pomeranian |
| Alterkom Sp. z o.o. | Lesser Poland |
| Altinet | Masovian |
| Altix | Masovian |
| Altkomp | Lesser Poland |
| ALTRAN | Masovian |
| ALX | Masovian |
| AMAGE Systems Sp. z o.o. | |
| Amano | |