Crowdfunding platform due diligence comprises background checks, site visits, credit checks, cross-checks, account monitoring, and third party proof on funding projects. We evaluate the factors associated with platforms’ compliance expenses, and their due diligence application. We find that due diligence is related to legislation requirement, platform size, and type or complexity of crowdfunding campaigns. In addition, we find that platforms applying due diligence provide more services to project issuers and funders. Furthermore, due diligence is associated with higher percentage of successful campaigns, more fund contributors, and larger amount of capital raised on platforms. Our analyses are supported by platform-level data, covering the period 2014–2017.