Best free and paid antivirus programs

The internet is full of threats like malwares and blows of Phishing, so that even routine actions, such as shopping online and open attachments from a e-mail, may compromise your security. So using a reliable antivirus program is critical to keep your device more secure. But how to choose an antivirus when there are so many options available? To help make the decision a little easier, we've put together this list of best free and paid antivirus programs all with Windows, macOS, Android and iOS:

Main threats to computers

Choosing an antivirus program starts with understanding... What type of threat do you actually face on a daily basis?. See the main ones:

Virus

These are malicious programs that install themselves in legitimate files or systems and spread when the infected file is executed. They usually rely on a user action (such as opening an attachment or installing software) to spread and can cause anything from slow performance to file corruption, system crashes, or data loss.

Malware

It's an umbrella term that encompasses any software created with malicious intent, including viruses, worms, Trojans, spyware, ransomware, and others. Their purpose can vary: stealing information, espionage, sabotage, remote device control, or resource exploitation (such as cryptocurrency mining without consent).

spyware

It is spyware that monitors user behavior, collecting browsing data, habits, credentials, and personal information, often without consent. It can be used for commercial espionage, abusive advertising, or identity theft.

Trojan Horse

A program that disguises itself as legitimate software (games, cracks, fake updates) but, when executed, opens doors for attacks, data theft, or remote control of the computer. Unlike a virus, it does not replicate on its own.

Keylogger

These are programs or devices that record everything the user types on the keyboard, including passwords, bank details, messages, and confidential information. They can be invisible software running in the background or even physical hardware connected between the keyboard and the computer, and are extremely dangerous because they operate silently.

Ransomware

It is a type of malware that hijacks computer data, encrypting files and demanding a payment (ransom) to release access. Even after payment, there is no guarantee of data recovery. It is one of the most serious current threats, affecting home users, businesses, hospitals, and governments.

Phishing

It's a social engineering technique, not necessarily software, that tricks the user into providing sensitive information such as passwords, card numbers, or personal data. It usually occurs through emails, messages, SMS, or fake websites that mimic legitimate services (banks, social networks, well-known companies).

Worm

Malware that spreads automatically across a network, exploiting security vulnerabilities without requiring user interaction. Worms can cause network congestion, system crashes, and rapid spread in corporate environments.

Adware

Software that displays unwanted ads, redirects pages, or installs invasive browser extensions. While not always destructive, it compromises privacy, reduces performance, and can serve as an entry point for more serious malware.

Rootkit

A set of malicious tools designed to conceal the presence of other malware, giving the attacker deep control of the system. They are difficult to detect and can survive even several removal attempts.

Botnet

A network of computers that are infected and remotely controlled by an attacker, usually without the users' knowledge. These machines ("zombies") are used for DDoS attacks, spamming, fraud, or illegal mining.

Feat

Code or technique that exploits security flaws in software, operating systems, or browsers. An exploit can be used alone or as part of malware to gain unauthorized access to a system.

What do you look for in a good antivirus?

Not all antivirus programs are good. Some help more than they hinder your daily life, slowing down your machine or, worse, not being effective at all (we're looking at you). McAfeeUnderstand what you should look for in the best antivirus:

• Behavior-based detectionThis technology monitors suspicious activity in real time — such as a file attempting to alter dozens of documents at once — and automatically blocks it before damage occurs.
• sandboxing: used for suspicious files located on your PC, the environment of sandboxing"This is an isolated space that the antivirus creates to perform the scan without posing a risk to the computer. This is essential for those who download programs from various sources, work with many attachments, or access cloud services. Without this layer, just one wrong click on an infected PDF can compromise the entire system."
• Browser protectionAntivirus software should also offer browser protection and phishing prevention. Many modern attacks don't even download a file—they attempt to steal passwords directly through fake pages, pop-ups, or scripts hidden on ordinary websites. A good antivirus also connects to the internet browser, checks the reputation of each accessed website, and automatically blocks pages that impersonate banks, stores, and social networks. This function is indispensable for those who shop online or use internet banking.
• Pay attention to performance: Another criterion that makes a difference is evaluating the The impact of antivirus software on computer performance.Advanced protections are important, but if the program consumes excessive memory or slows down the system during scans, it becomes a problem. The best solutions use optimized processes, partial scans (incremental scans), and intelligent prioritization, which adapts the scan according to whether you are working, playing, or just browsing.
• Extra features: also observe the set of extra features that increase overall security....and not just basic antivirus. This includes firewall integrated to block suspicious connections, VPN to protect traffic on public networks, password manager to securely store logins and passwords for services, webcam protection against unauthorized access, parental control to define what children can access and monitoring online data leaks to notify you if your email has appeared in any data breach. These features help ensure truly comprehensive security.

Online Guides

See below for a list of the best. free antivirus available on the market:

Microsoft Defender

O Microsoft Defender It is the native antivirus of Windows It offers real-time protection against viruses, ransomware, and other threats without requiring additional installation. It's free, integrates seamlessly with the operating system, consumes few resources, and updates automatically. For most average users, it provides a reliable and discreet layer of security, ideal for those seeking practicality without sacrificing protection.

• Price: Free (included in Windows).
• Platforms available: Windows (integrated into Windows 10/11); Android, iOS e MacOS via apps from the Microsoft Defender family.

Bitdefender Antivirus Free

O Bitdefender Antivirus Free It focuses on providing strong security with minimal interference to daily use. It utilizes advanced behavior-based detection technology to block modern threats such as phishing and malware that attempt to disguise themselves. With a simple interface and fast scans, it's an attractive option for those who want high-level protection without complex configurations.

Price: Free (Free version for continuous use).

Platforms available: Windows.

Avast Free Antivirus

O Avast Free Antivirus It offers a robust suite of free features, including intelligent scanning, protection against malicious websites, and Wi-Fi network monitoring. Its approach combines behavioral analysis and cloud-based verification, helping to detect threats in real time. It is suitable for users who value extra features and want to track more details about their computer's security status.

• Price: Free (Free version available).
• Available platforms: Windows, macOS, Android and iOS.

AVG Antivirus Free

O AVG Antivirus Free It offers consistent defense against viruses, spyware, and dangerous links, with automatic updates and customized scans. The software has a user-friendly and lightweight interface, making it easy to use even for those unfamiliar with antivirus software. It stands out for its good balance of performance and protection, making it a reliable option for keeping your computer safe on a daily basis.

• Price: Free (Free version available).
• Platforms available: Windows, macOS, Android and iOS.

Kaspersky Free

O Kaspersky Free It delivers high-quality protection focused on the essentials: effective and silent security against viruses, Trojans, and suspicious files. The program uses the powerful detection engine of... KasperskyRecognized for its accuracy in independent tests, ensuring fast threat blocking and deep scans. Lightweight and to the point, it's ideal for those who want strong security without overloading their system.

• Price: Free.

• Available platforms: Windows.

Payments

See below for a list of the best. paid antivirus available on the market:

Surfshark One / One+

O Surfshark One This service combines antivirus, VPN, leaked data monitoring, and privacy tools into a single package, offering comprehensive protection for both your device and online browsing. The antivirus works in real time, blocking malware and suspicious files, while the VPN encrypts the connection and increases security while browsing. In the One+ version, the user also has more complete identity monitoring, making the service ideal for those seeking integrated security with a focus on privacy.

• Price: Surfshark Starter - R$ 6,99/month / Surfshark One - R$ 8,99/month / Surfshark One+ – R$ 15,99/month.
• Platforms available: Windows, macOS, Android, iOS.

F-Secure Total

O F-Secure Total It combines advanced antivirus, secure VPN, and browsing protection to offer a complete digital security experience. Its defenses utilize artificial intelligence to identify suspicious behavior and prevent viruses, ransomware, or malicious websites from causing harm. The package also includes identity protection and parental control features, making it a balanced solution for those who want strong security, enhanced privacy, and additional tools for everyday online use.

• Price: F-Secure (1 device) R$ 377,95 / F-Secure (3 devices) R$485,95 / F-Secure (5 devices) R$539,95.

• Available platforms: Windows, macOS, Android and iOS (F-Secure Total combines antivirus, VPN, and password manager into a single app for multiple platforms).

Bitdefender Total Security

O Bitdefender Total Security It offers comprehensive protection that combines advanced antivirus, firewall, anti-ransomware, integrated VPN, and system optimization tools. Its detection engine is one of the most accurate on the market, operating silently and consuming few resources. In addition to digital security, the package includes parental controls and protection for multiple devices, making it a strong solution for those seeking comprehensive security for the whole family.

• Price: Total Security (5 devices): R$ 99,99 (promotional price for the first year) / Bitdefender Total Security Family (25 devices): R$249,99 (promotional price for the first year).
• Available platforms: Windows, macOS, Android and iOS (Multi-platform protection; includes basic VPN and extras depending on the plan).

Trend Micro Maximum Security

O Trend Micro Maximum Security It offers comprehensive protection against viruses, ransomware, dangerous websites, and online fraud attempts. Its AI technology identifies suspicious behavior and blocks threats before they can take hold. The package also includes a password manager, parental controls, and tools to protect financial transactions, making it ideal for those who value enhanced security when browsing and shopping online.

• Price: Maximum Security (5 Devices): R$285,00
• Available platforms: Windows, macOS, Android and iOS (Product designed for multiple devices and includes anti-ransomware features, browsing protection, and parental controls).

TotalAV Antivirus Pro

O TotalAV Antivirus Pro It offers a suite of tools for protection against viruses, malware, and online threats, combining fast scans with cloud-based detection. In addition to real-time protection, the package includes optimization features that help improve computer performance by cleaning unnecessary files and managing startups. Its simple interface makes it intuitive to use, making it an attractive option for those seeking efficient security without complications.

• Price: TotalAV™ Premium (3 Devices) – R$ 495,00 / TotalAV™ Internet Security (6 Devices) – R$ 645,00 /TotalAV™ Total Security (8 Devices) – R$ 745,00.
• Available platforms: Windows, macOS, iOS, and Android (cross-platform apps; plans differ in the number of devices covered).

Do you use any of these? antivirusLeave a comment below!

See also:

Discover all the iPhone viruses discovered to date (and protect yourself from them)

Source: CNET.

reviewed by Luis Antonio Costa in 02 / 12 / 2025