April Cybersecurity Insights – Funding and M&A

April’s cybersecurity funding landscape was defined by a sharp acceleration in AI-driven innovation and the investment to match it.

From large-scale Series B rounds to a wave of well-funded seed-stage entrants, capital is flowing heavily into companies rethinking how security operates in an AI-first world. Whether it’s protecting non-human identities, monitoring autonomous agents, or enhancing detection and response through machine learning, the common thread is clear: security is being rebuilt for a fundamentally different operating environment.

Alongside this, strategic acquisitions from major players signal a continued push to strengthen capabilities across identity, data security and offensive training, as organisations look to keep pace with increasingly complex and fast-moving threats. In this month’s roundup, we break down the key funding rounds and M&A activity shaping the cybersecurity market, and what it tells us about where the industry is heading next.

Series B:

TENEX.AI raise $250M in Series B Funding | Founded in 2024,TENEX is an AI-native cybersecurity company specializing in advanced Managed Detection and Response (MDR) services. The round was led by Crosspoint Capital Partners
Linx Security raise $50M in a Series B Funding | Founded in 2023, Linx Security is the AI-native identity security and governance platform built for the era of AI agents and non-human identities. The round was led by Insight Partners.

Series A:

Artemis Security raise $70M in Series A Funding | Founded in 2025, Artemis Security is a cybersecurity company focused on protecting organizations from advanced digital threats. The round was led by First Round Capital and Brightmind Partners.

Seed:

Spectrum Security raise $19M in a Seed funding | Founded in 2025, Spectrum Security automates how organizations build, deploy, and maintain the detections that keep them safe. The round was led by TechOperators.
Rilian raise $17.5M in Seed Funding | Founded in 2024, Rilian is a cybersecurity technology company that develops AI-driven platforms to detect, analyze, and respond to cyber threats. This round was led by 8VC, First In, and Tamarack Global.
Trent AI raise $13M in Seed Funding | Founded in 2025, Trent AI specializes in developing autonomous, domain-expert AI agents that enhance productivity by collaborating with humans. This round was led by LocalGlobe and Cambridge Innovation Capital.
General Analysis raise $10M in Seed Funding | Founded in 2025, General Analysis is an early stage AI security startup focused on making enterprise AI systems safer and more reliable. The round was led by Altos Ventures.
Capsule Security raise $7M in Seed Funding | Founded in 2025, Capsule Security continuously monitors AI Agent behavior and intervenes during runtime at the first sign of anomalous or unsafe activity. This round was led by Lama Partners and Forgepoint Capital.

M&A

Fortra announce their agreement to acquire Zero-Point Security Ltd | This will expand Fortra’s offensive security education capabilities, bringing additional training expertise in red team operations, adversary emulation, and penetration testing. The deal amount was not disclosed.
Cyera announce their agreement to acquire Ryft (acquired by Cyera) | The acquisition adds agent-ready data lake capabilities to Cyera’s data security platform as enterprises race to deploy autonomous AI systems that access, analyze and act on sensitive corporate data. The deal amount was valued between $100M-$130M.
Silverfort announce their agreement to acquire Fabrix Security (Acquired by Silverfort) | Silverfort plans to combine Fabrix’s identity-centric AI decisioning engine with its Runtime Access Protection technology to allow enterprises to adopt agentic AI and scale their business without losing control. The deal amount was not disclosed.
Cisco announce their agreement to acquire Astrix Security | Astrix’s capabilities will be integrated into Cisco’s broader security platform, including Cisco Identity Intelligence and its Zero Trust applications such as Duo and Secure Access. The deal amount was $400M.

Find out more about the companies mentioned in this article:

Series A