Postmaster Alternatives

An object-relational database system that boasts a vast set of features and a growing community.

EasyPost is the simple shipping API for the UPS API, USPS API, Fedex API, DHL API, and more. Compare rates, buy postage, track packages, verify addresses, and more.

Shipping, easy and affordable for everyone. A set of unified APIs and tools that instantly enables you to ship your goods internationally

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.

MongoDB (from "humongous") is a scalable, high-performance NoSQL database.

open-source

Seamless eCommerce shipping fulfillment software. Wherever you sell, however you ship, ShipStation can help. Auto order import, batch label print, & more!

SQLite Home Page

Windows Azure and SQL Azure enable you to build, host and scale applications in Microsoft datacenters.

Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

open-source

OrientDB - The World's First Distributed Multi-Model NoSQL Database with a Graph Database Engine.

An open-source systems monitoring and alerting toolkit.

Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.

Apache Kafka is publish-subscribe messaging rethought as a distributed commit log.