Product Marketing Alliance — Check out PMA to see my talk from PMM Fest and other PMM-centric articles about pricing
Profitwell (formerly Price Intelligently) — Profitwell is the best agency for conducting pricing studies to get the high fidelity custom market data needed to make optimal pricing decisions. They also produce a ton of great content of their own on how to manage pricing. I’ve linked to their most complete piece of content here.
Stripe — Stripe is the leading credit card processor for tech companies because they take a developer-first mentality. The “Atlas” section of their site also contains a ton free guides including their guide to SaaS pricing which I have linked here.
Statista — Statista is the best source for market sizing data
Zuora — Zuora is the leading software provider for managing subscription price lists to keep your financial and sales systems in sync. I highly recommend it. They also have a lot of resources on their site pertaining to subscription models.
Optimizely — Optimizely is the best tool to use for optimizing the pricing page of your website (and every other page)