Spin-waves are propagating collective spin excitations of magnetic materials. In a classical approach, they are considered as potential information carriers in future logic and RF devices. Recently, spin-waves were proposed to mediate the long-distance entanglement of NV spin-qubits, a key bottleneck of this field. Furthermore, classical spin-waves can also benefit NV based quantum sensing by amplifying the microwave excitation and enlarging their instantaneous detection bandwidth. In parallel, magnons, the bosonic analog of spin-waves, and can host quantum behaviors such as magnonic Bose-Einstein condensate (m-BEC). To date, m-BEC remain debated and observed in only one system. We anticipate that NV quantum sensing techniques will enable a direct access to m-BEC in ferromagnetic and antiferromagnetic insulators, which could host spin-superfluids. The TACTIQ project has two objectives. On the fundamental side, we will explore magnon BEC in selected materials using NV sensing, optical spectroscopy and high field EPRVNA spectroscopy. On the applied side, we will on the short term employ NV magnetometry to develop and benchmark magnon based devices and on a longer term realize building blocks for the magnon and NV based hybrid quantum devices.