Consider the vendor experienced in building the type of blockchain solution you want and serving the industry you operate in. Chances are, such a company already has clients with similar needs and thus will be able to create the solution that meets your business specifics. Look for a vendor that provides blockchain consulting. Such a company will help you optimize the blockchain solution design and determine the proper development approach – you get an opportunity to cut the project cost and timelines. Pay attention to the available skills and tech stack. A good vendor will be able to provide all necessary competencies – from BA and PM to coders and QA engineers – to cover blockchain development end to end. General expertise in IT matters. It helps differentiate the pros with established practices from the newbies with limited experience and a focus on quick success. A strong portfolio and customer testimonials indicate a trustworthy tech partner with a proven track record in the domain.