Datomic - The fully transactional, cloud-ready, distributed database
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
DynamoDB - Amazon DynamoDB is a fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale. It is a fully managed cloud database and supports both document and key-value store models.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Valentina Server - Valentina Server is 3 in 1: Valentina DB Server / SQLite Server / Report Server
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.