Knowledge Base Help & Documentation:
Can I upgrade my Joomla to a new version using your service?
Yes, absolutely! We provide Joomla to Joomla migrations. The supported versions are 1.5.x- 3.x
It’s possible to move your content pages, articles, categories/sections, images, comments, tags and internal links to your new Joomla installation fast and straightforward.
Get more details here: https://cms2cms.com/cms/supported-cms/joomla/