I have been using Copyscape for long and I end up spending a lot of money in checking the duplicate content for various link building activities. I also use Grammarly free for basic proofreading at times but I have heard that their Plagiarism Checker in almost equally good as Copyscape. The current prices of Grammarly is $29.95 per month as mentioned here: https://www.grammarly.com/premium But they also have an option for Volume Licensing which is a sort of legal group buy option for businesses or for educational institutions as mentioned here. https://www.grammarly.com/edu/plans-and-pricing/purchase Has anybody tried that out? The prices are significantly lower and cost less than 3 dollars a month for say 50 users group plan. Even for 20 users group plan, it is slightly higher than 4 dollars a month. Most of us probably spend more than that even on Copyscape per month. And there is no limit of no. of plagiarism checks in Grammarly. In addition, there are other advanced Grammarly features which are important in this age of SEO where content is becoming more and more important with the passage of time. So, it seems to be a good deal. Has anybody tried out the volume license in Grammarly and is anybody out there interested in forming a group for the volume license? And do they allow 20 different browser addon installation (premium version) for the 20 user group license for example?