If you're using Rails have a look at https://github.com/seojs/seojs-ruby, it's a gem similar to prerender but it's using our managed service at http://getseojs.com/ to get the snapshots. There are also ready to use integrations for Apache and Nginx.

Some benefits of SEO.js to other approaches are:

- it's effortless, you don't need to setup and operate your own phantomjs server

- snapshots are created and cached in advance so the search engine crawler won't be put off by slow page loads

- snapshots are updated regularly