SearchStax offers the following Solr releases for self-service deployments. The list below was derived from the Create Deployment dialog box of the SearchStax Dashboard, which naturally takes precidence over this help page.
8.8.1 8.6.3 - Recommended 8.4.0 8.3.1 8.2.0 8.1.1 7.7.2 - Recommended 7.6.0 7.5.0 7.3.1 7.2.1 6.6.6 - Recommended 6.6.4 6.6.3 6.6.2 6.6.1 6.2.0 5.5.5
SearchStax reserves the right to modify this list at any time.
SearchStax does not force clients to upgrade. We continue to support clients whose Solr versions are now considered obsolete.
Premium clients (gold, platinum, platinum plus) may request Solr versions that are not on this list.
Specific versions of Solr are compatible with specific versions of Sitecore. See Sitecore’s Solr Compatibility Table for further information.