Microsoft offers lots of resources and partner programs for partners and startups.
Here is the link on Microsoft Partner channels you can use for your company.
Six MS Partner Channels for Companies
- Microsoft Action Pack Subscription (MAPS) https://partner.microsoft.com/40016455
- Microsoft Action Pack Development & Design https://partner.microsoft.com/40132997
- Microsoft Technet https://technet.microsoft.com/
- Microsoft Partner Silver / Gold Competency https://partner.microsoft.com/40109866
- Microsoft Cloud Partner https://partner.microsoft.com/en-US/cloud-solution-provider/
- Microsoft BizPark for Partners (Give you free full MSDN access) http://www.microsoft.com/bizspark/
- Microsoft MSDN https://visualstudio.microsoft.com/subscriptions/
- Microsoft Student to Business (S2B) is another program I mentioned earlier http://www.microsoft.com/studentstobusiness/home/default.aspx
Microsoft Bizpark is free for startup, privately held and under $1M business. These options will give you access to Microsoft resources to help you grow the business.