| December 2025 | Niobium Microsystems raised a seed roundInvestor Blockchange Ventures | Encryption, Encryption and key management | $23m | Report on the Niobium Microsystems funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Multifactor raised a seed roundInvestor Nexus Venture Partners | Password managers | $15m | Report on the Multifactor funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Mirror Security raised a pre-seed roundInvestors Atlantic Bridge and Sure Valley Ventures | Encryption, Encryption and key management | $2.5m | Report on the Mirror Security funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Lumia Security raised a seed roundInvestor Team8 | AI security, AI and LLM security | $18m | Report on the Lumia Security funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Imper.AI raised a seed roundInvestors Battery Ventures and Redpoint | DRP, Digital risk and brand protection | $28m | Report on the Imper.AI funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Helmet Security raised a seed roundInvestors SYN Ventures and WhiteRabbit Ventures | AI security, AI and LLM security | $9m | Report on the Helmet Security funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Eon raised a Series D roundInvestor Gil Capital | Backup, Backup and cyber recovery | $300m | Report on the Eon funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Electrosoft raised a corporate roundInvestor DigitalNet.ai | MSSP, Managed security services | Undisclosed | Report on the Electrosoft funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Cognna raised a Series A roundInvestors BNVT Capital and Impact46 | EDR, EDR and XDR | $9.2m | Report on the Cognna funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Axiado Corporation Inc raised a Series C roundInvestor Maverick Silicon | IoT security, IoT, embedded and product security | $100m | Report on the Axiado Corporation Inc funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Antithesis raised a Series A roundInvestor Jane Street Capital | AST, Application security testing | $105m | Report on the Antithesis funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | AnChain.AI raised a Series B roundInvestors Amino Capital and Emmanuel Vallod | IR, Incident response | Undisclosed | Report on the AnChain.AI funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Alinia AI raised a seed roundInvestor Mouro Capital | AI security, AI and LLM security | $7.5m | Report on the Alinia AI funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | 7AI raised a Series A round7AI provides AI agents that automate security operations centre tasks for enterprises.Investor Index Ventures | Agentic SOC, Agentic SOC tools | $130m | Report on the 7AI funding round of December 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| December 2025 | Woven Solutions acquired Cystemic SecurityCyber solutions including managed attribution, forensics, vulnerability analysis and attribution control | DRP, Digital risk and brand protection | Undisclosed | Report on Woven Solutions buying Cystemic Security, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | TRM acquired Sheffield Scientific | | Undisclosed | Report on TRM buying Sheffield Scientific, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Synergy ECP acquired NetServicesSecure federal IT modernisation, software engineering, cybersecurity and enterprise operations | Consulting, Security consulting and vCISO | Undisclosed | Report on Synergy ECP buying NetServices, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Symposit acquired HumanLinkHuman factors engineering consultancy for aviation and transportation security training | Awareness training, Security awareness and human risk | Undisclosed | Report on Symposit buying HumanLink, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | SPIE acquired Cyqueo | | Undisclosed | Report on SPIE buying Cyqueo, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Silent Push acquired HYASWatches for threats early and filters domain name lookups | Threat intel, Threat intelligence | Undisclosed | Report on Silent Push buying HYAS, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | ServiceNow acquired VezaVeza provides an identity security platform that manages access to data across cloud and on-premises systems. | IGA, Identity governance and administration | $1bn | Report on ServiceNow buying Veza, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | ServiceNow acquired ArmisArmis provides cyber exposure management and security for connected devices and operational technology. | IoT security, IoT, embedded and product security | $7.8bn | Report on ServiceNow buying Armis, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Red River acquired InvictusNational security services provider with cyber, intelligence and enterprise modernisation capabilities | Consulting, Security consulting and vCISO | Undisclosed | Report on Red River buying Invictus, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Red Hat acquired Chatterbox LabsAI security and safety company offering guardrails and safety testing | AI security, AI and LLM security | Undisclosed | Report on Red Hat buying Chatterbox Labs, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | oXya acquired Axl & TraxSAP cyber security, access control and risk management consulting | IGA, Identity governance and administration | Undisclosed | Report on oXya buying Axl & Trax, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Outpost24 acquired InfinipointChecks devices and their state, then lets staff log in safely | ZTNA, Zero trust network access | Undisclosed | Report on Outpost24 buying Infinipoint, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Northern Telecom acquired C-STEMZero trust architecture and managed IT solutions | ZTNA, Zero trust network access | Undisclosed | Report on Northern Telecom buying C-STEM, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | MetaCompliance acquired JunglemapSecurity and compliance awareness training using NanoLearning methodology | Awareness training, Security awareness and human risk | Undisclosed | Report on MetaCompliance buying Junglemap, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Limerston Capital acquired AristiCHECK and CREST-accredited Birmingham-based cyber security consultancy with over 15 years of experience delivering penetration testing, red teaming, and OT security assessments for government and private sector clients. | Pen testing, Penetration testing | Undisclosed | Report on Limerston Capital buying Aristi, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | itSynergy acquired ComplyIT and cybersecurity services for registered investment advisers | MSSP, Managed security services | Undisclosed | Report on itSynergy buying Comply, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Integrity360 acquired RedshiftAfrican cyber security services firm, details not described | MSSP, Managed security services | Undisclosed | Report on Integrity360 buying Redshift, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Integrity360 acquired CrescoBenelux cyber security services firm, details not described | MSSP, Managed security services | Undisclosed | Report on Integrity360 buying Cresco, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Infinum acquired AMR CyberSecurityPenetration testing and security consulting services | Pen testing, Penetration testing | Undisclosed | Report on Infinum buying AMR CyberSecurity, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | ID-Pal acquired NorthRowKnow your business checks and anti-money laundering compliance intelligence | GRC, GRC and compliance automation | Undisclosed | Report on ID-Pal buying NorthRow, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Harbor IT acquired ZAG TechnicalManaged service provider for agricultural manufacturing, with OT and IT expertise | MSSP, Managed security services | Undisclosed | Report on Harbor IT buying ZAG Technical, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Cyderes acquired LucidumA data layer built around identity for current cyber defence | ITDR, Identity threat detection and response | Undisclosed | Report on Cyderes buying Lucidum, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Checkmarx acquired TromzoBuilds AI-native autonomous security agents for application security | SOAR, SOAR and security automation | Undisclosed | Report on Checkmarx buying Tromzo, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | BTQ acquired KeypairKorean full-stack security company with post-quantum cryptography intellectual property | Encryption, Encryption and key management | Undisclosed | Report on BTQ buying Keypair, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Broadwing Capital acquired CloudScale365Managed IT, cloud, hosting and security solutions for smaller businesses | MSSP, Managed security services | Undisclosed | Report on Broadwing Capital buying CloudScale365, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | BigBear.ai acquired Ask SageGenerative AI platform for secure deployment in regulated environments | AI security, AI and LLM security | Undisclosed | Report on BigBear.ai buying Ask Sage, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Bastion acquired Phronesis SecurityProvides cyber security audit, assurance and technical assessment services | Consulting, Security consulting and vCISO | Undisclosed | Report on Bastion buying Phronesis Security, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Arteris acquired CycuitySemiconductor cybersecurity assurance specialist | IoT security, IoT, embedded and product security | Undisclosed | Report on Arteris buying Cycuity, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Aretum acquired Veterans EngineeringSupplies government bodies with digital and cloud protection skills | Consulting, Security consulting and vCISO | Undisclosed | Report on Aretum buying Veterans Engineering, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| December 2025 | Akamai Technologies acquired FermyonFunction as a service company, not described in the source | | Undisclosed | Report on Akamai Technologies buying Fermyon, December 2025 (opens in a new tab)via SecurityWeek (opens in a new tab) |
| November 2025 | vijil raised fundingInvestor Brightmind Partners | AI security, AI and LLM security | $17m | Report on the vijil funding round of November 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| November 2025 | SpecterOps raised fundingAdversary-focused security firm created by former DoD red team operators. Creators of BloodHound. CREST-accredited for penetration testing, red teaming, and purple team assessments. | Pen testing, Penetration testing | $30m | Report on the SpecterOps funding round of November 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| November 2025 | Social Links raised a seed roundOSINT and social media investigation software, including SL Crimewall, an API and a Maltego integration, used by law enforcement and corporate security teams.Investor Yellow Rocks! | OSINT, OSINT tools | $3m | Report on the Social Links funding round of November 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| November 2025 | Opti raised a seed roundInvestors YL Ventures, Mayfield Fund and Hetz Ventures | IAM, Identity and access management | $20m | Report on the Opti funding round of November 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| November 2025 | NetFoundry raised a Series A roundInvestor Cisco Investments | SASE, SASE and SSE | $15m | Report on the NetFoundry funding round of November 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |
| November 2025 | CodeNotary raised funding | SCA, Software supply chain and SBOM | $16.5m | Report on the CodeNotary funding round of November 2025 (opens in a new tab)via Security, Funded (opens in a new tab) |