SendGrid

SendGrid is the world's largest cloud-based service for delivering email that matters. SendGrid's proven platform successfully delivers over 18B transactional and marketing related emails each month for Internet and mobile-based customers like Airbnb, Pandora, Hubspot, Spotify, Uber and FourSquare as well as more traditional enterprises like Walmart, Intuit and Costco. Azure customers receive up to 25,000 emails per month for free with paid packages starting at only $9.95 per month. For customers requiring ability to send larger email volumes, SendGrid also offers Silver, Gold, Platinum and Premier packages, which include a dedicated IP as well as additional IP and user management features.