Algae are the ‘green gold’ of the future bio-economy as they became a valuable and sustainable feedstock for numerous industries contributing to the bio-sustainability. Their application varies from biofuels, food additives, animal feed, novel food, bio-plastics, cosmetics, bio-fertilizers or CO2 utilization and many more. The market is rapidly expanding, and it is still not reached its full potential. Scientists are working on new technologies and cost optimization to scale up pilot projects to industrial production for a better green and clean future.