Bitdefender

Bitdefender software was originally developed by SOFTWIN, a company founded in 1990 in post-communist Romania. It was originally sold as AVX (Antivirus Expert) from 1996 until 2001, when the Bitdefender subsidiary was created and AVX was rebranded under the Bitdefender name. In 2007, Bitdefender became a separate business entity with external capital entry, with Axxess Capital Investment Fund as a key shareholder. From 2004 to 2015, the company expanded with offices in the United States, Germany, United Kingdom, Denmark, and the Middle East. In 2017, the company acquired French partner Profil Technology. British fund Vitruvian Partners would then buy a 30% stake in the company, putting its valuation over $600 million. In 2018, Bitdefender opened a new subsidiary in Australia through acquisition of assets from SMS eTech. That year, the company also acquired behavioral and network security analysis company RedSocks. Bitdefender analysts use telemetry from the company’s threat intelligence engines to identify, investigate, and respond to threats. Bitdefender signed a multi-year partnership deal with Scuderia Ferrari on September 28, 2022. The partnership expanded in 2023 to include integration of Bitdefender Advanced Threat Intelligence into all of Ferrari’s operational systems. In October 2025, Bitdefender extended its partnership with Scuderia Ferrari HP through 2028. In August 2023, Bitdefender acquired Singapore-based Horangi Cyber Security, expanding its managed detection & response services and absorbing Horangi's team of experts. Bitdefender announced the launch of Bitdefender Voyager Ventures, a corporate venture capital unit, in April 2024. The venture invests in early-stage cybersecurity and AI startups, including Validaitor, a spinoff of the Karlsruhe Institute of Technology. In May 2024, Bitdefender and NinjaOne announced a partnership to integrate their security software into a single product suite. Bitdefender also has a partnership with the San Antonio Spurs to provide cybersecurity services, and partners with Arrow Electronics to offer its subscription-based services. In February 2025, Bitdefender acquired a division of Bitshield responsible for distributing Bitdefender products and services in Malaysia and Brunei. In June 2025, Bitdefender announced an agreement to acquire Mesh Security Limited, an Ireland-founded provider of email-security technology. Financial terms of the transaction were not disclosed. Mesh’s capabilities was expected to be incorporated into Bitdefender’s existing security platforms, pending regulatory approval. Since 2016, Bitdefender has advised Europol’s European Cybercrime Centre (EC3) in supporting investigations into online criminal activity. Bitdefender joined the No More Ransom initiative in 2016, releasing free decryption tools for victims of ransom attacks to decrypt their devices without having to pay to do so. This included releasing a free universal decryption kit for users affected by the GandCrab ransomware attack in 2018. In 2016, Bitdefender advised the FBI, the DEA, and the Dutch National Police (with the support of Europol) during Operation Bayonet, culminating in the shutdown of the AlphaBay and Hansa black markets in 2017. In 2018, Bitdefender joined the Cybersecurity Tech Accord, and in 2019, provided operational support to the European Cybercrime Centre, helping shut down the Sipulimarket and Silkktie darknet markets. Bitdefender's 2020 research into the Interplanetary Storm botnet proxy network was provided to law enforcement ahead of the FBI dismantling the network in November 2023. In September 2023, Bitdefender provided support to Finnish authorities contributing to the seizure of the PIILOPUOTI dark web marketplace. In May 2024, Bitdefender was a supporting partner for Europol's Operation Endgame, which Europol called the largest operation ever against bots, including IcedID, SystemBC, Pikabot, Smokeloader and Bumblebee. It led to the takedown of over 100 servers, and four arrests worldwide. The next phase of Operation Endgame, which took place between November 10 and 13, 2025, led to 1,025 servers being taken down, disrupting credential theft, crypto wallet compromise, and other online attacks affecting hundreds of thousands of victims. Researchers for Bitdefender provided Finnish customs with information to help shut down the Sipulitie Tor marketplace in October 2024. == Products and services ==

Bitdefender's original product was sold as Antivirus Expert until 2001, when it was rebranded under the Bitdefender name. Their all-in-one plans are available for Windows, Mac OS, iOS, and Android, and offered in tiers, including Bitdefender Ultimate Security, and specific plans for small businesses and content creators. The company also releases free decryption tools for victims of ransomware attacks, including the BitLocker-abusing ShrinkLocker ransomware in 2024. Enterprise Bitdefender's endpoint security products are managed through the GravityZone platform. The company also offers an extended detection and response (XDR) platform and additional security services. GravityZone expanded in 2025 to include PHASR (Proactive Hardening and Attack Surface Reduction), which allows for dynamic, individualized security configurations. Artificial intelligence In May 2022, Bitdefender researchers made available over 25,000 AI agents trained on 60 Atari games to help other researchers with imitation and multi-task learning. In December 2023, Bitdefender launched Scamio, a free AI-powered scam detector, which was integrated into WhatsApp in April 2024, and Discord in October 2024. In October 2024, the company announced it was consolidating its scam detection and AI prevention technologies into the Scam Copilot platform. ==Controversies and incidents==

Trojan.FakeAlert.5 On March 20, 2010, computers running Bitdefender under 64-bit versions of Windows were affected by a malfunctioning update that classified every executable program as well as DLL files as infected. These files were all marked as 'Trojan.FakeAlert.5' and were moved into quarantine. This action led to software and systems malfunctions that affected users globally. Bitdefender representatives announced the removal of the faulty update and a workaround for the users affected, except for those using the 2008 version. DarkSide ransomware In 2020, hacker group DarkSide switched its main encryption ransomware product over to an "affiliate" model wherein other attackers could download and use its software in exchange for a portion of the profits. However, it introduced a bug in the process where affiliate hackers would all use the same private RSA key - meaning that a decryption package for a single target who paid the ransom would work on any target that had the ransomware installed. Security researchers noticed and were quietly already helping victims of the software, but with no public notice, making it so that the attackers would only see an inexplicable decrease in ransom payments that could be written off as chance. Months later, Bitdefender publicly released a decryptor of its own development and issued a blog post describing the flaw. Security researchers studying the Colonial Pipeline cyberattack in May 2021 criticized Bitdefender for using the bug as a brief burst of publicity, though they acknowledged that DarkSide would’ve eventually noticed and fixed the issue. Bitdefender defended its actions, saying it only wished to notify as many organizations as possible, triggering a discussion among cybersecurity professionals about the pros and cons of publicly disclosing such vulnerabilities in malware: while the provision of free decryption tools may provide relief for some ransomware victims (who might otherwise not receive free and timely help from experts), their usefulness is short-lived as hackers use these same tools to improve and develop new ransomware software. Since the creation of its free Darkside Ransomware Decryption Tool, Bitdefender has continued to provide free decryption and recovery tools to the general public on 'multiple occasions', the latest being February 2023. == Awards ==

• 2023 - AV-TEST Top Product, Best Protection, Best Android Protection, and Best MacOS Security • 2023 - AV-Comparatives Outstanding Security Award • 2023, 2024 - Representative Vendor for Managed Detection and Response, Gartner Market Guide • 2023, 2024, 2025 – Visionary, Gartner Magic Quadrant for Endpoint Protection • 2024 - AV-Comparatives Top Product Award • 2024 - Leader in Endpoint Security, The Forrester Wave • 2024, 2025 - Named one of PCMag's Best Tech Brands. Four products, including Bitdefender Ultimate Security, also maintained Editor’s Choice status in 2024. ==See also==