MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Datomic - The fully transactional, cloud-ready, distributed database
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.
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.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
MarkLogic Server - MarkLogic Server is a multi-model database that has both NoSQL and trusted enterprise data management capabilities.