Currently the following Acronis products support Windows 8/8.1:

• Acronis Cyber Protect 15
• Acronis Cyber Backup 12.5
• Acronis Backup 12
• Acronis Backup (Advanced) 11.7
• Acronis Backup (Advanced) 11.5 (Acronis Backup & Recovery 11.5)
• Acronis Cyber Protect Cloud, Acronis Cyber Backup Cloud
• Acronis Cyber Protect Home Office (formerly Acronis True Image)
• Acronis True Image 2021 Standard, Essential, Advanced and Premium
• Acronis True Image 2020 Standard, Essential, Advanced and Premium
• Acronis True Image 2019 Standard, Advanced and Premium
• Acronis True Image 2018, Acronis True Image Advanced, Acronis True Image Premium
• Acronis True Image 2017, Acronis True Image Subscription
• Acronis True Image 2016, Acronis True Image Cloud (Release 2016)
• Acronis True Image 2015, Acronis True Image Unlimited
• Acronis True Image 2014
• True Image 2013 by Acronis (starting with build 6514)
• True Image Lite 2013 by Acronis
• Acronis Backup for VMware (Acronis vmProtect 9)
• Acronis vmProtect 8
• Acronis Snap Deploy 5
• Acronis Snap Deploy 4

(!) Currently Windows RT is not supported by any Acronis product and there are no plans to support it. This article will be updated if any of the Acronis products becomes compatible with Windows RT.