From experience in looking for a resume builder myself, the one I ended up using had alot of great examples of resumes to refer to. The majority of other resume builders tend to include examples but they are very basic and for a first timer it was really difficult to create my resume with simple templates. To gain traction in the market, a resume builder must have free and reliable templates from real resumes that have been used to apply to jobs and have gotten accepted for it. Having a good reference point is crucial in building a resume.