Avast One review

Avast One is the most direct answer to the question of whether you need to pay at all. The Free Antivirus tier blocks viruses and other malware in real time on PC, Mac, Android and iPhone, and Avast says that free engine earned an AV-Test Top Product award in December 2025. Paying adds more: Premium Security costs $49.08 for the first year for 1 PC plus 1 mobile device, then renews at $77.99, and a 10-device version is $69.48 for the first year. Ultimate starts at the same $49.08 but renews at $109.99. Avast Assistant helps flag scam messages and offers. The catch is the gap between first-year and renewal prices, so set a reminder before the term ends. For someone who wants more than Microsoft Defender's built-in tools without a big bill, the free tier is the low-risk first step.

Who it is for

people who want a free antivirus with an upgrade path

Price

Free Antivirus is free; Premium Security $49.08 first year (renews at $77.99); Ultimate $49.08 first year (renews at $109.99).

Premium Security Save 37% $77.99 $49.08/first yr
Quoted from the vendor pricing page on November 12, 2026.

Key features

• Free Antivirus tier with real-time virus and malware blocking
• AV-Test Top Product in December 2025 for Avast Free Antivirus, per Avast
• Avast Assistant to help detect scam messages and offers
• Premium Security covers 1 PC plus 1 mobile device
• 30-day money-back guarantee and a 30-day trial on paid plans

Strengths and weaknesses

• Strength: A permanent free tier, so you can start without paying
• Strength: Premium Security first year is $49.08
• Strength: 10-device Premium Security is listed at $69.48 for the first year
• Weakness: Premium Security renews at $77.99 a year after the first-year discount
• Weakness: The single-PC plan covers only 1 PC and 1 mobile device
• Weakness: Ultimate's first-year price matches Premium but renews at $109.99

Key facts

• Free plan: Yes, Avast Free Antivirus
• Premium Security: $49.08 first year, renews $77.99
• 10 devices: $69.48 first year
• Guarantee: 30-day money-back

Where it ranks

Avast One is No. 4 in our Best Antivirus Software verdict.