Open source it, get user base and code contributions. Then, if it takes off, offer an 'enterprise' version with perceived benefits. The 'enterprise' version ca

Open source it, get user base and code contributions. Then, if it takes off, offer an 'enterprise' version with perceived benefits. The 'enterprise' version can be a complete re-write with a couple of features that don't get included in your 2.0 open source edition. Assuming you get users for the original open source version and that the extra features are worth having, you can sell the product on to them. Whether they buy it or not comes down to price. Testing is also something you can sell. There are advantages in having a separate test team, be that test team. Provide a good service and build a customer base.