| 1000030554 | QoL-Ma UG | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000045846 | Qoro Quantum UG (haftungsbeschränkt) | DE-Germany | Company | No | Incubatee | ESA BIC Bavaria | |
| 1000027843 | QuadSAT | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000040920 | QuantumDiamonds GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000046773 | QuantumSpaceAI Oy | FI-Finland | Company | No | Incubatee | ESA BIC Finland | |
| 1000022753 | QUASAR SCIENCE RESOURCES, S.L. | ES-Spain | Company | Yes | Alumnus | ESA BIC Madrid Region | |
| 1000045023 | QuiMo GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Baden-Württemberg | |
| 1000032877 | RADIAN SPACE SL | ES-Spain | Company | Yes | Alumnus | ESA BIC Madrid Region | |
| 1000035074 | Raptor Aerospace Limited | GB-United Kingdom | Company | No | Alumnus | ESA BIC UK | |
| 1000041224 | REA Srl | IT-Italy | Company | No | Alumnus | ESA BIC Turin | |
| 1000046075 | Redar PC | GR-Greece | Company | No | Incubatee | ESA BIC Greece | |
| 1000041748 | Redeem Solar Technologies GmbH | AT-Austria | Company | Yes | Alumnus | ESA BIC Austria | |
| 1000043436 | Reef Support B.V. | NL-Netherlands | Company | No | Alumnus | ESA BIC Noordwijk | |
| 1000033378 | REFARMO GmbH | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000042750 | reLi Energy | DE-Germany | Company | No | Alumnus | ESA BIC Hessen | |
| 1000044910 | Remea GmbH | AT-Austria | Company | No | Incubatee | ESA BIC Austria | |
| 1000037593 | Remos Space Systems AB | SE-Sweden | Company | No | Alumnus | ESA BIC Sweden | |
| 1000047024 | Renegade Science Innovation FlexCo | AT-Austria | Company | Yes | Incubatee | ESA BIC Austria | |
| 1000046938 | Resmonics AG | CH-Switzerland | Company | No | Incubatee | ESA BIC Switzerland | |
| 1000033344 | Responsive Access Limited | GB-United Kingdom | Company | No | Alumnus | ESA BIC UK | |