We've now added Spee Dee to our workflow, bypassing ShipStation for those orders. It's a pain in the rear. We're now shipping something like 20% of our total orders, and probably something like 90% of our midwest orders, via Spee Dee and outside of ShipStation.
I am a developer and I wrote a simple integration for our e-commerce system with Spee Dee's web API in an afternoon. It queries with an origin zip, a destination zip, and a weight and returns the shipping cost (and also a zone number which would allow you to look up a transit time in days). Your team would likely need to build a more robust integration, so maybe it would take a few days instead of an afternoon. Seems like a no-brainer.
Speedee would be a very valuable addition for us, we would ship a lot of packages through this carrier if we could incorporate it into our current shipstation workflow.
Please add.