Our high-end product is CSE HTML Validator Enterprise. This edition includes everything CSE HTML Validator has to offer, including priority support and maintenance (PS&M) and a Batch Wizard that has more features and is capable of handling larger jobs.
Our mid-level product is CSE HTML Validator Professional. This edition is available as a trial, and includes the Batch Wizard and Configuration Editor.
Our basic paid product is CSE HTML Validator Standard. This product provides the same syntax checking thoroughness as higher editions, but doesn't include some features, like the Batch Wizard.
There's also a free version of CSE HTML Validator Standard that can be used for personal and non-commercial use only.
We also have an online edition based on CSE HTML Validator Pro.