Pay with Bolt provides online payments for SaaS looking to offer different payment processors to their customers. They wrap the major payments providers around the world with one API and a consistent payments experience for SaaS to use. They're PCI DSS Level 1 certified. They provide payments in well known SaaS products like SalesForce, Zendesk, QuickBooks as well as enabling their other clients to whitelabel their solution with their own apps.