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.

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.

SQLite Home Page

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

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

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

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

See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.

freemium $15.0 / Monthly (per host)

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

Splunk's operational intelligence platform helps unearth intelligent insights from machine data.

The open-source database for the realtime web

HTTP + JSON document database with Map Reduce views and peer-based replication