
Halcyon
Founded Year
2021Stage
Series C | AliveTotal Raised
$190MValuation
$0000Last Raised
$100M | 8 mos agoMosaic Score The Mosaic Score is an algorithm that measures the overall financial health and market potential of private companies.
+27 points in the past 30 days
About Halcyon
Halcyon specializes in cybersecurity and focuses on anti-ransomware solutions and cyber resilience for enterprise customers. The company offers a platform that provides layered protection against ransomware, including pre-execution detection, behavioral modeling, and recovery features, as well as key capture and automated decryption to prevent data extortion. Halcyon primarily serves the global enterprise sector, offering tools and assessments to enhance its cyber defense capabilities. It was founded in 2021 and is based in Austin, Texas.
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Expert Collections containing Halcyon
Expert Collections are analyst-curated lists that highlight the companies you need to know in the most important technology spaces.
Halcyon is included in 3 Expert Collections, including Cybersecurity.
Cybersecurity
10,758 items
These companies protect organizations from digital threats.
Artificial Intelligence
10,047 items
Unicorns- Billion Dollar Startups
1,276 items
Latest Halcyon News
Jun 30, 2025
As Hawaiian Airlines discloses a breach, the FBI warns airlines to be on the alert (Image credit: Getty Images) The FBI is warning that the Scattered Spider cyber crime group has expanded its activities to target the airline industry, with both Hawaiian Airlines and Canada's WestJet confirming cybersecurity incidents. Scattered Spider uses social engineering techniques, often impersonating employees or contractors, to deceive IT help desks into granting access, the FBI warned in an advisory late last week. The group is often able to bypass multi-factor authentication (MFA) , for example, by convincing help desk services to add unauthorized MFA devices to compromised accounts. "They target large corporations and their third-party IT providers, which means anyone in the airline ecosystem, including trusted vendors and contractors, could be at risk," the FBI said. "Once inside, Scattered Spider actors steal sensitive data for extortion and often deploy ransomware. The FBI is actively working with aviation and industry partners to address this activity and assist victims." Scattered Spider warning comes after airlines targeted The warning follows an alert from Hawaiian Airlines late last week that a cyber incident was affecting some of its IT systems. It was still operating its full flight schedule, it said. "We have taken steps to safeguard our operations, and our flights are operating safely and as scheduled. Upon learning of this incident, we engaged the appropriate authorities and experts to assist in our investigation and remediation efforts," it said. Get the ITPro daily newsletter Sign up today and you will receive a free copy of our Future Focus 2025 report - the leading guidance on AI, cybersecurity and other IT challenges as per 700+ senior executives Contact me with news and offers from other Future brands Receive email from us on behalf of our trusted partners or sponsors By submitting your information you agree to the Terms & Conditions and Privacy Policy and are aged 16 or over. "We are currently working toward an orderly restoration and will provide updates as more information is available." Earlier this month, Canada's WestJet said it was shoring up its defences after an incident that saw access for several users restricted. The airline is investigating the incident with the help of third-party cybersecurity experts and forensic specialists. It's not been confirmed who was behind the attacks. However, last week, security firm Halcyon warned that Scattered Spider was now targeting new sectors - not just aviation but also food and manufacturing in the US. "Scattered Spider attacks disrupt entire organizations from top to bottom, creating ripple effects that threaten financial viability, customer trust, and operational continuity," the company said in an advisory. "These attacks unfold swiftly and ruthlessly, transforming ordinary systems in just hours." Airline industry warnings continue There have been similar warnings for aviation companies from Palo Alto's Unit 42, with SVP of consulting and threat intelligence Sam Rubin warning them to be on high alert for sophisticated and targeted social engineering attacks and suspicious MFA reset requests. Darren Williams, CEO and founder of BlackFog, said the airline industry is a prime target for threat actors due to the huge disruption that attacks can cause for both operators and commuters globally. Moreover, the industry processes huge volumes of sensitive consumer data, making airlines a lucrative target. “With international travel currently at its peak, the aviation industry is under immense pressure to deliver seamless service, and cyber criminals are exploiting that pressure,” he said. “The sector is a treasure trove for cyber criminals, handling vast amounts of valuable passenger data.” "With incidents like this one highlighting how threat actors are actively and deliberately targeting airlines, operators must remain vigilant, investing in robust defences that safeguard customer data, protect operations, and customer trust.” MORE FROM ITPRO
Halcyon Frequently Asked Questions (FAQ)
When was Halcyon founded?
Halcyon was founded in 2021.
Where is Halcyon's headquarters?
Halcyon's headquarters is located at 5900 Balcones Drive, Austin.
What is Halcyon's latest funding round?
Halcyon's latest funding round is Series C.
How much did Halcyon raise?
Halcyon raised a total of $190M.
Who are the investors of Halcyon?
Investors of Halcyon include SYN Ventures, Bain Capital Ventures, Corner Capital Management, Harmony Group, Evolution Equity Partners and 10 more.
Who are Halcyon's competitors?
Competitors of Halcyon include Myota and 5 more.
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