Spark Post API
Send email from your app. The world’s most powerful email delivery solution is now yours in a developer-friendly, quick to set up cloud service.
With Pipedrive CRM designed for salespeople, by salespeople, you’re able to do more to grow your business. Easily build integrations with our API and reach over 90k companies in the Pipedrive Marketplace
Email marketing, ads, landing pages, and CRM tools to grow your business on your terms. Now use there API to integrate into your custom applications.
Optimizely is the world's leading experimentation platform, empowering marketing and product teams to test, learn and deploy winning digital experiences, every time.
Microsoft Advertising Platform - Bing Ads API
Provides programmatic access to various advertising technologies.