Onyx Security

Onyx Security is the secure AI control plane trusted by leading Fortune 500 companies, bringing visibility, governance, and security to AI agent adoption.

[Onyx Security @Onyx_Security]

Congratulations to our Co-founder and CEO, @maximbarkogan, on being named to Israel’s 40 under 40 list for 2026.

@TheMarker considers Maxim to be among the most promising young people in Israel, and we certainly agree! Maxim taught himself to code at age 10, served in Unit 8200 of the IDF, and became an offensive cybersecurity expert and competitive coder. He has since built a track record as an accomplished cybersecurity leader and technology executive.

This recognition reflects the curiosity, determination, and leadership Maxim brings to @Onyx_Security every day as we pursue our mission to control advanced AI.

Congratulations, Maxim. Well deserved! 👏

[Onyx Security @Onyx_Security]

When an AI agent fails, who is accountable? 🤔

A new @CIOonline article by @GrantGross highlights a growing disconnect: 52% of technology leaders say the CIO is blamed for agent mistakes, even when the CIO did not select the technology or cannot see what the agent is doing. So what are companies to do?

@gil_elbaz_, Onyx's Co-founder and Chief AI Officer, told CIO: “CIOs shouldn’t be blamed for every agent mistake, but they are accountable for putting effective governance and automated controls in place, alongside CISOs from a security perspective. Accountability rests with the people and organizations responsible for governing agents - not with the agents themselves.”

AI misalignment may be inevitable, but a lack of governance is not. Organizations need visibility into agent activity and automated controls that keep actions aligned with user intent and company policies.

Accountability must ultimately rest with the people and organizations responsible for governing agents, not with the agents themselves.

🌐 Read the full article here: https://t.co/ZYoHFIXh3O

[Onyx Security @Onyx_Security]

The 2026 Latio AI Security Market Report is out, and Onyx Security has been named an AI Security Platform Leader. 🏆

This report draws on interviews with vendors, practitioners, and industry leaders to examine how the market is evolving, what organizations are prioritizing, and where vendors are investing.

Regardless of where you use AI in your organization, Onyx has you covered with a secure AI control plane that provides unmatched visibility, governance, and protection.

"The endpoint and broader Al security markets are converging fast; Onyx is one of the vendors making that convergence practical."

Thank you @JamesBerthoty and the Latio team for the rigorous work behind this report (and for the recognition). 🌟

[Onyx Security @Onyx_Security]

🏆 Onyx has been named to the prestigious Next Billion Dollar Startups list by @ForbesIsrael.

This recognition comes at a pivotal moment for AI. As models grow more intelligent and agents become more sophisticated, Onyx’s mission to control advanced AI has never felt more urgent.

The challenge is not merely about AI security, but steering rogue agent actions in real time at machine scale. Companies need a single platform to govern and control AI everywhere - from coding agents on employee desktops to models hosted on cloud platforms and everywhere in between.

We’re proud of what our team has built, grateful to our customers for their trust, and excited for what’s next.

Read the full article here (Hebrew): https://t.co/puHk9RyrPD

[Onyx Security @Onyx_Security]

A monumental moment calls for a monumental billboard. ��

To celebrate our $113M Series B, Onyx Security lit up the Nasdaq Tower in Times Square, bringing our mission to control advanced AI to one of the world’s most iconic stages.

Seeing Onyx shine above the heart of New York City was a surreal reminder of how far we’ve come in two years and how much lies ahead.

Thank you to our customers, employees, partners, and investors for helping us reach this milestone. The future is bright. Very, very bright.

Our CEO @maximbarkogan shares the significance of this moment in his latest blog post: https://t.co/o5t65zK8N4

@BessemerVP, Cyberstarts, TCV, @conviction, @FirstMarkCap, @Vintage_Inv, @QuantumLightVC, G Squared

[CTech @Calcalistech]

AI security startup @onyx_security raises $113 million Series B at $640 million valuation.

Just four months after emerging from stealth, the Israeli startup is betting that securing AI agents will become one of cybersecurity's biggest markets.
https://t.co/dzbzaMrvl9

[Vintage Investment Partners @Vintage_Inv]

The AI economy will be built on trust.

As AI agents begin to reason and act across critical systems, enterprises need to understand not only what they are doing, but why.

We’re proud to invest in @onyx_security, which is building the control layer for the agentic era, using AI to monitor AI and provide context-aware oversight in real time.

Congratulations to @maximbarkogan, @gil_elbaz_ , and the entire Onyx team on the $113M Series B.

@iren_reznikov

[David Waltcher @DavidWaltcher]

Palo Alto secured traffic at the application layer when business software moved to the web. CrowdStrike shipped a cloud-native sensor when work left the perimeter and the laptop became the frontline. Wiz built a graph-first CNAPP when cloud adoption accelerated. The largest companies in cyber get created during secular platform shifts.

Each one of those shifts changed how we work. This time, it's also changed who's doing the work: agents. To do so, they inherit the same permissions and access as the humans they act for, which makes them a highly privileged and capable threat vector operating at superhuman speed. @maximbarkogan and @gil_elbaz_ saw that coming before anyone, and founded @onyx_security to build the category defining control plane to govern and secure agents.

Security tools were built to watch deterministic software and human-led workflows. They can't govern a non-deterministic model chaining tool calls against inputs nobody vetted in advance. Onyx's bet is that only AI can: proprietary models sitting in the runtime path, inspecting every agentic action and blocking or redirecting it before it reaches a downstream system with warp speed and accuracy.

Excited to be backing Maxim, Gil, and the Onyx team in their $113M Series B, alongside our friends at @BessemerVP, @Cyberstarts1, @conviction, and @TCVTech.

cc @sullivan @amitkarp @saranormous @HZinshtein

[Maxim Bar Kogan @maximbarkogan]

We started Onyx two years ago with the mission to control advanced AI. Today, we’re announcing our $113M Series B led by @BessemerVP, and partnering with Cyberstarts, @TCVTech, @FirstMarkCap, @conviction, Vintage, QuantumLight and G Squared.

As we enter the age of superintelligence, our mission becomes more critical.

We are just getting started!
@amitkarp @morgangerlak @spdholakia @HZinshtein @giliraanan @saranormous @DavidWaltcher @iren_reznikov @SpencerMcLeodVC

https://t.co/FnBMXTkn0Q

[Bessemer @BessemerVP]

https://t.co/uAUtYneYQw

[Onyx Security @Onyx_Security]

Advanced AI needs a control layer.

Today, Onyx is announcing our $113M Series B led by @BessemerVP, bringing total funding to $153M after growing 4x in the last 4 months.

As models become more capable, our mission to control advanced AI becomes increasingly important. Organizations need to understand intent and steer outcomes in real time.

We're fortunate to build this new category with support from @amitkarp & @spdholakia (BVP), @HZinshtein & @giliraanan (Cyberstarts), @morgangerlak (TCV), @saranormous (Conviction), @DavidWaltcher (FirstMark), @iren_reznikov (Vintage), Louis Fontaine (QuantumLight), @SpencerMcLeodVC (G Squared).

Read our coverage in Axios: https://t.co/VWnwADbG3j

[Onyx Security @Onyx_Security]

Onyx is heading to #BlackHat2026, and we've packed the week with experiences you won't want to miss.

🚁 Helicopters & Supercars
📸 Private Professional Headshots
🍸 Mixology Class
🥟 Dim Sum Lunch

Space is limited. Register today: https://t.co/aoqilkuL1S

[Onyx Security @Onyx_Security]

Onyx now integrates with the Claude Compliance API.

The chats, files, projects, and logs in Claude Enterprise now flow into the Onyx platform, alongside data from the endpoint and browser.

Get full visibility, governance, and security from Onyx.

https://t.co/FMDGI05RZD

[Onyx Security @Onyx_Security]

🎙️Our Chief Strategy Officer @youngbloodtim, a 4x Fortune 500 CISO, joined The Watershed podcast to talk agentic AI risk, governance, and what security leaders need to do now.

Don't miss this insightful discussion: https://t.co/KvIayeLJlI

[Onyx Security @Onyx_Security]

Our CEO @maximbarkogan joined No Priors to explore the complexities of supervising and securing autonomous agents in the enterprise.

Thanks @saranormous for the great conversation. Check out the full podcast!

[No Priors @NoPriorsPod]

🔥 new episode: @maximbarkogan co-founder CEO https://t.co/L7HLozOsp2 on why we need independent understanding and governance of AI, training agents that watch other agents, mechanistic interpretability, Mythos/Glasswing/Daybreak, and blitz chess

[Onyx Security @Onyx_Security]

👋 Onyx Security accelerates enterprise AI adoption, securely. We recently emerged from stealth with a secure AI control plane for the agentic era.

Check out our announcement to learn more:

https://t.co/9m1BWWmFuU