MonoGame

MonoGame offers an open-source .NET game framework with XNA 4 API, content pipeline, and tools for cross-platform 2D/3D development. In practice that means running multi-step campaigns that react to what people do.

Who is it for? Mostly marketing teams with more than one channel. Related areas on their profile: 3D Technology, Content, Desktop Apps, Developer Tools and Gaming. As a very small product team themselves (1 to 10 people), they tend to serve customers of a similar scale best. You will probably talk to the people who build it, which is great until you need 24/7 support.

MonoGame is based in Dallas, Texas. You can read more at monogame.net.

Things worth asking about: CRM integration, lead scoring, and how fast the learning curve is. Ask for a trial on your own data, not a canned demo.

The facts above come from public company records. The score will come from people like you. Used MonoGame? Rate it.