Metrics are required platforms (iOS, Android, Web, Windows, macOS, Linux), components (see matrix on https://pspdfkit.com/pdf-sdk/), number of users, number of server nodes (if Docker-based), number of apps/[sub]domains, internal/external access and expected support, to name a few. We're usually quite fast to figure something out that works for both parties, pricing is in the 4 (passion projects) to 6 (enterprise) figure range. Simply drop us a message via https://pspdfkit.com/sales to get things started. We try to make this process as easy as possible.
You should probably consider putting something basically exactly like this paragraph on your site, especially the pricing range.
^ this. Please provide a pricing page with a few options and even a usage calculator. Without it, you'll be hard pressed to find enough folks giving this a real shot and will just assume that it's enterprise-only and out of their range.
I see everything is through a sales person now and I'd like to get a better high level understanding of high level costs for passion projects (<1000 users), small-medium (<100k), and enterprise (1M+). What metrics are you charging usage on?