We are developing, testing and using Akeeba DocImport using the latest version of Joomla! and a popular and actively maintained branch of PHP 7. At the time of this writing this is:
Joomla! 3.9
PHP 7.2
Akeeba DocImport should be compatible with:
Joomla! 3.8, 3.9
PHP 5.6, 7.0, 7.1, 7.2, 7.3.
Changelog
Bug fixes
Partially reverted removal of Search feature, it's used in other features of our site