ESA Planck mission is profiting of its last few months of operations while a new ESA mission, Euclid, is entering its design phase. Like Planck, Euclid is a survey mission mainly devoted to Cosmology, to be launched in 2020 and injected in orbit far away from the Earth, for a nominal lifetime of 6 years. 
The two missions have a number of commonalities especially from the operational point of view. This push towards profiting of the Òlessons learnedÓ in Planck to optimize the operation concept and architecture of Euclid and of its instruments. 
Both Planck and Euclid have two instruments on-board, Planck the Low Frequency Instrument (LFI) and the High Frequency Instrument (HFI), Euclid the Visible Imager (VIS) and the Near-Infrared Spectro-Photometer (NISP). 
After a general review of the commonalities and differences between the two missions, we will concentrate on the instrument point of view, on one side on the LFI and on the other on the NISP. In particular, we will analyse how we have built the concept of an integrated instrument development and verification approach, where the scientific, instrument and ground-segment expertises have strong interactions starting from the early phases of the project, during the full development phase towards the in-flight calibration.