The product is an email-like app/service that massively increases collaborative productivity. The customers are teams, groups and businesses that are heavily reliant on email for communication and collaboration.
With TMail, these businesses can increase their collaborative productivity dramatically (70-80% improvement for many use cases). They can do this in Intra-B, B2B and B2C contexts. Their onboarding and training overhead will be low, because TMail retains the email metaphor to the greatest extent possible. Finally, TMail interoperates with email in the sense that users can send TMails to email addresses.