Portico is one of several organizations providing digital preservation services for the academic community. We know that you need to evaluate options and that doing so can be challenging. What questions should you ask? What criteria are important? Below we offer some help by providing a comparison of participation and the content in Portico to other services as well as a report on how Portico meets key factors necessary for digital preservation established by third-party preservation experts, Anne Kenny and Richard Entlich, and first published by CLIR in 2006. Factual information on other services is gathered and updated from public sources.