I'm using Slack + Gitlab + Pivotal. Overcoming resistance depends on the source. Managers like that they don't need to chase engineers for updates. Engineers like that everything is integrated, so if they 'git push' while referencing the Pivotal story ID, the story will be updated/finished/delivered.
Email in profile, feel free to get in touch if you want more detail.
Email in profile, feel free to get in touch if you want more detail.