Will the credit pull affect my applicant's credit score?

No. The Intellirent Experian credit reports are a soft pull.

Our direct partnership with Experian provides an integrated identity verification (IDV) that needs to be completed by the applicant with the social security number. 

The applicant is verifying their identity through this integrated IDV step. Passing the IDV is a request from the applicant directly to Experian asking that their credit reports be released, thus initiating a soft pull.