The AWS SDK for Unity now supports AWS Lambda,so you can easily execute cloud functions from your games built on Unity, without the need to provision infrastructure. In addition, and the AWS SDK for Unity now supports the Amazon Simple Email Service (SES),so you can send transactional emails directly from games built in Unity. The AWS Mobile SDK for Unity is compatible with Unity 4.0 and onwards, and supports both the Free and Unity Pro versions.
Source: amazon.com