Outsourcing is a tricky business because each team you outsource has to be vetted to make sure that their IT skills match the customer that you're pairing them up with.
For instance, if you say that your target is online tech businesses within SaaS, it's important that you specify what frameworks you've helped out with in the past and what frameworks you mostly target for because they are in the most demand.
Mobile - Xamarin, React, .NET, Object C, C#, Android SDKs
To integrate leads, I suggest that you first have case leads where the system actually works bringing in an outsourcing group to a specific client. I understand that you essentially want to create a marketplace so to speak where you taking outsourcing agencies and pair them up with tech businesses looking for inexpensive ways to build software.
First, create some past examples of where you have reviews, sales reports and customer services with stories and testimonials that suggests your marketplace works.
Second, go to staffing agencies and offer your marketplace solutions to them which will help them start driving advertising campaigns for anyone looking for tech jobs whether local, domestic or global.
***Business relationships are about trust and that takes time to earn. You need tangible evidence for something this big. While I think your idea is fantastic and noble because you're about bringing people and help together in a niche community, it will take some time.
If you'd like, I'd be happy to schedule a call with you. Feel free to follow me on my FlipSetter portfolio - https://flipsetter.com/user/profile/Y8wT2