My current platform does not help me to take advantage of certain marketing opportunities. I'm hoping to find a platform with as many of the following integrations as possible. I'm on a small business budget, so services like Channel Advisor are out of reach. All suggestions are welcome.

ShipStation (required)

Shopping Integrations
Buy buttons on any web page
Jet.com
Pinterest
Instagram
Facebook
Twitter

Payment Integrations
Paypal
Stripe
Amazon Payments