We are a startup that is specialized in connecting API publishers and business users.
Thanks in advance.
* If you're a startup scrambling for traction, why are you so particular about the method by which your partners' services are delivered? What's so special about REST APIs? Why do you care if it's compute-bound? Shouldn't you be willing to work with anyone?
* What value do you actually offer? I'm not sure if you're an API integrator, a billing backend person, a contract sales team, or what.
* You specialize in connecting API publishers to business users, but you're on HN asking for SW companies. If this is your specialty shouldn't you already know? Or do you have a deep list of businesses with validated needs? The impression you're giving here is that you don't actually have ANY clients on either side of this transaction. I'm left wondering if there is a similar post on a business-focused message board somewhere.
I've re-written your pitch as an example. I don't know if this is anything close to what you actually do, but hopefully it's illustrative: "Hi! We're a new startup in the cloud computing space. We take high performance hardware and manage it for other software companies... we're like AWS EC2, but focused exclusively on compute-bound workloads (and we're less expensive too). If you sell your services through an API, we've also built a nifty service layer to automate all your security, logins, and billing. We take care of all the paperwork so you can focus on running your service. We're looking for more partners, so please take a look at our beta [insert link here]. We'd love to hear your feedback. If you send me a PM, I'll also get you 50% off your first 3 months. Thanks!"
Anyway, hope that's at least somewhat helpful.