Is it possible to launch a kickstarter without an agency?

Is it?!? I must know. We are planning on launching our Kickstarter on April 7th. I've had a few chats with different agencies. All in, it seems like marketing through the agency will eat up 30% of our gross funds raised. We are a SaaS product that has a hardware companion product that I'd like to launch together on Kickstarter. We did an Indiegogo campaign 8 years ago, but it seems like so many campaigns are using Funded Today or others to help them get a large email list and to run facebook ads. Anyone have any thoughts on this?

Thanks!