Running a business can be overwhelming, and you and your team probably aren’t going to be able to do it all on your own. That’s where third-party vendors come in. Companies in every industry from HR to business phone systems exist to partner with you and help you run your business better.

When you’re searching for B2B partners, you’ll have to choose carefully. These companies will have access to vital and potentially sensitive business data, so it’s critical to find someone you can trust. In our guide to choosing business partners, our expert sources recommend asking potential vendors about their experience in your industry, their track record with existing clients and what kind of growth they’ve helped other clients achieve.