An ICO agency is a company that helps businesses to develop and market their ICO projects. The agency can study your concept to determine the best development and marketing strategies. 
Because of multiple ICO agencies in the market, it takes time to pick the right ones. So, when searching for an agency, you should evaluate the following aspects:
Experience: an experienced agency has a team of development and marketing professionals committed to helping projects succeed in the blockchain. So, it would help if you evaluated the company’s portfolio and reviews of reviews of clients. This enables you to understand the quality of solutions the agency delivers.
Communication: effective communication helps the team deliver services as per the client’s requirements. When evaluating an ICO agency, try to assess how it communicates. The agency should demonstrate impeccable listening skills and pose relevant questions about your project.
Cost: different agencies offer their services at different rates. So, checking the price and determining whether it falls within your budget is advisable.