| "dieSeitenmacher" Bauhofer e.U. | Lower Austria |
| .kloos KG | Vienna |
| 0x2a.at | Vienna |
| 1 Million Startups | |
| 1000x1000 Crowdbusiness GmbH | |
| 1010 Works GmbH | |
| 10X Impact GmbH | |
| 110p GmbH | |
| 118811 Die Nummer GmbH | Vienna |
| 123 Sonography GmbH | |
| 1domain.at | Tyrol |
| 1MillionStartups | |
| 1zu1 Prototypen GmbH & Co. KG | |
| 25superstars | |
| 2beFOUND Performance Marketing GmbH | Vienna |
| 2meter3 | Vienna |
| 3 Banken IT GmbH | Upper Austria |
| 3DataX GmbH & Co. KG | |
| 3GSM GmbH | |
| 3U Telecom GmbH | Vienna |
| 3VC Partners GmbH | |
| 4kStudio | |
| 506 Data & Performance GmbH | |
| 5G Pay GmbH | |
| 7Lytix GmbH | |
| 8Bit-Homecomputermuseum | Vienna |
| 9Y Media Group GmbH | |
| a!der Reiter | Vienna |
| A-1 | Vienna |
| A-HEAT Allied Heat Exchange Technology AG | |
| A-Null Bausoftware GmbH | Vienna |
| A-SIT Secure Information Technology Center Austria | Vienna |
| a-webdomain.at | Vienna |
| A.SYS IT-Sicherheit KG | Vienna |
| A1 Group | |
| A1 Start Up | |
| A1 Start Up Campus | Vienna |
| A1 Telekom Austria AG | Vienna |
| A3-Avionics GmbH | |
| a:head bio AG | |
| Abaton | Styria |
| Aberger Software GmbH | Upper Austria |
| ABES Pircher & Partner GmbH | Styria |
| Abis Softwareentwicklungs Ges.m.b.H. | Styria |
| ABK Bausoftware | Vienna |
| ABPro Entwicklungs-, Vertriebs- und Wartungs GmbH | Lower Austria |
| ABSS Interactive | Vienna |
| AC & Friends GmbH | |
| Academia Computer | Vienna |
| ACAM Systemautomation GmbH | Styria |