We offer the free version of Alfred to allow users to familiarise themselves with the core features, but this doesn't include Snippets Text Expansion, as the latter is a Powerpack-only feature. To download the free version of Alfred, visit https://www.alfredapp.com and click "Download Alfred 3".
If you'd like to use the Snippets feature, we offer an affordably priced Single User license. Of course, if you have any questions, don't hesitate to ask here, and fellow users will be able to help you decide.