I own an ecommerce company, I've used 3PLs, and I just can't see how you could have a meaningful market for this (and to be clear I mean the current product at openship.org, not everything that you're describing).
It's basically a many-to-many connector of storefronts to 3PLs. The problem is very few people have multiple of either, let alone both. Nobody's on Shopify + WooCommerce + Wix and fulfilling from Shippo and Vistaprint.
Unless you have someone with multiple options at both ends, this isn't needed - there are 3PLs that can integrate with multiple storefronts and storefronts that can integrate with multiple 3PLs. No need to pay for a third party connector to do that.
If there is a company out there with some complex need for multiple of everything, it's probably big enough to have a dev team to integrate all their services anyway.
The bigger picture that you describe is interesting in theory, but it misses the point of Amazon's value. Amazon has infrastructure, sure, but what really matters is they have customers. I sell from my website, but I'm also on Amazon because all I had to do was list my products there and people started buying them. On my own site, I have to acquire those customers.
It's basically a many-to-many connector of storefronts to 3PLs. The problem is very few people have multiple of either, let alone both. Nobody's on Shopify + WooCommerce + Wix and fulfilling from Shippo and Vistaprint.
Unless you have someone with multiple options at both ends, this isn't needed - there are 3PLs that can integrate with multiple storefronts and storefronts that can integrate with multiple 3PLs. No need to pay for a third party connector to do that.
If there is a company out there with some complex need for multiple of everything, it's probably big enough to have a dev team to integrate all their services anyway.
The bigger picture that you describe is interesting in theory, but it misses the point of Amazon's value. Amazon has infrastructure, sure, but what really matters is they have customers. I sell from my website, but I'm also on Amazon because all I had to do was list my products there and people started buying them. On my own site, I have to acquire those customers.