TeamViewer 9 for Windows is free to download from the Previous Versions section of the TeamViewer website and is compatible with Windows 10. TeamViewer 10 was released in December 2014. The most recent version of the software is also available for free download from the TeamViewer website.
As of 2015, licensing options on TeamViewer 9 restrict free usage of the software to personal, noncommercial activities only. Businesses and individuals that use TeamViewer for any commercial purpose must buy a license. License prices range from a one-off payment of around $700 for small businesses to over $3,000 for large organizations. License upgrades for repeat customers may cost less.