A hundred seconds is barely enough time to complain about a meeting. At a startup event Yisrael Gross helped organize in Jerusalem, it was enough time to ask for an investment. The founders pitched. The investors asked questions. Any idea that required a lengthy preamble would have to learn to travel lighter.
That little arrangement captures something of Gross’s professional life. He has spent years bringing technical ambition into contact with other people’s attention, money and purchasing decisions. Today, he is co-founder and CEO of ammune.ai and a managing partner at TYH Investments. Earlier, he founded YourStartApp and worked on the commercial side of L7 Defense, the API-security company he co-founded with Doron Chema.
The appealing detail is how those worlds first connected. Before the cybersecurity company, there were gatherings. Before a shared business, there was a meeting at one of them. A career concerned with getting through doors began with the rather sensible decision to give people somewhere to walk in.
A room before a company
Gross’s account of entering cybersecurity is unusually practical. He came from marketing and business development for startups and managed technology communities. He described the Israeli cyber scene as a close-knit circle, with many connections formed in military units. For someone approaching from another direction, having an idea was only part of the problem. Access mattered too.
His response was to launch Israel Cyber Group. “You have to be creative,” he said. Organizing a community gave him a way to participate in the industry using experience he already had. He said he met Chema at one of the events he managed. They went on to co-found L7 Defense.
There is a pleasing economy to that sequence. Gross needed connections; he created a place for connections. The community work also brought him into contact with his future business partner. It is an origin story with very little ceremonial fog: arrange the meeting, meet someone, keep talking.
“You have to be creative.”
Yisrael Gross, on entering the cyber community
One hundred seconds in Jerusalem
The gatherings had a history of their own. On April 23, 2014, YourStartApp hosted Between Valleys at Google’s Tel Aviv Campus. More than 170 entrepreneurs attended, with others following the live stream. The event connected people working in Israel’s Silicon Wadi and California’s Silicon Valley.
Gross’s stated purpose was collaboration between entrepreneurs with different skills. The program put investors and founders in conversation, including Izhar Shay of Canaan Partners Israel, angel investor Zohar Levkovitz and Catch Media founder Yaacov Ben-Yaacov. The geography was ambitious. The mechanism was familiar: get people together and let useful conversations happen.
Later that year, Gross organized an annual investors and entrepreneurs event with the Haredi High-Tech Forum and Global Entrepreneurship Week. By its November announcement, more than 350 people from Israel and abroad had registered. YourStartApp’s offering included business-development advice, marketing, fundraising and networking. The event was one expression of that broader work.
In May 2016, Pitch Tonight brought the format to the Hebrew University of Jerusalem. Gross was one of its co-organizers. Each selected startup received 100 seconds to pitch, followed by spontaneous questions from an investor panel led by Shay. Gross also introduced Incubit Technology Ventures, which supported the event and had invested in L7 Defense.
The format made the encounter unusually direct. A prepared presentation gave way to questions about the company’s concept, current position and plans. A founder could rehearse the opening. The follow-up required knowing the business. One hundred seconds left the adjectives with very little elbow room.
Tel Aviv · April 2014
Jerusalem · May 2016
Taking the meeting abroad
Business development eventually meant taking the company into rooms much farther from home. On April 24 and 25, 2019, L7 Defense joined a European Innovation Council corporate event in Hamburg. It was one of 54 participating companies backed by the EIC pilot. The setting was the city’s old Customs House.
The program included pitches and individual meetings with corporate representatives. Gross described presenting API-security solutions to organizations including Commerzbank, comdirect, Lufthansa Technik and Salesforce. These were opportunities to explain the company’s work. The distinction between a meeting and a contract matters; his account describes the meetings.
In January 2021, L7 Defense announced a $4 million Series A, led by Germany’s TRUMPF Venture with participation from India’s Quick Heal Technologies. Gross was identified as co-founder and VP Business Development. The announced use of funds included marketing, business development and broader market reach. His comments emphasized international exposure and awareness.
A later Dubai encounter supplies a more concrete outcome. Gross recalled participating in GISEC in 2022 with the Israel Export Institute. A visitor approached because he was looking for API security. A month later, the company closed its first Dubai customer. Gross said that customer subsequently introduced the company at other exhibitions.
It is a compact business story: a relevant question, a purchase, then another introduction. In 2023, the Export Institute included Gross in its campaign marking 65 ambassadors of Israeli success. His example was rooted in what one conference connection had produced. A badge got him into the building; the buyer had a problem his company could address.
Security, with the jargon turned down
The company behind those conversations dealt with a subject that can become opaque remarkably quickly. APIs are interfaces that let software systems communicate. Protecting them means considering the traffic moving between applications, including requests that may carry an attack.
In his February 2021 interview, Gross described Ammune as a machine-learning platform that discovers APIs and develops profiles used to identify emerging threats. He emphasized automation and preserving ordinary traffic. He also described deployments in finance, telecommunications and software businesses across North America, Europe and Asia-Pacific.
Those were product claims, and the commercial emphasis was consistent: customers needed protection they could operate. Explaining the algorithm was useful. Explaining how the system would fit into a customer’s day was essential to the conversation. An enterprise security purchase has to survive contact with the people expected to manage it.
Gross also appeared with Tomer Eisner in L7 Defense’s coffee-break video series. The topics started at the beginning: what an API is, why its security matters, and whether a web application firewall provides enough protection. Viewers were invited to suggest questions for later conversations.
There is a small courtesy in beginning with the basic question. Technical discussion often rewards the person who already understands the vocabulary. A coffee-break format gives the explanation another pace. The coffee may be optional; knowing what the product is supposed to protect is rather less so.
The investor brings a calculator
Gross’s investment work adds another seat at the table. TYH’s team page lists him and Meir Izralevich as managing partners. The firm describes its focus as technology ventures and its role as providing capital alongside strategic guidance and industry expertise.
Gross’s advice to founders is more specific than the usual invitation to dream bigger. He has urged them to watch spending, distinguish necessary expenses from attractive extras, and understand their cash position before it becomes a surprise. “Startups should be managed like real businesses,” he wrote.
He acknowledges the attraction of the technology, the product and the dream. His argument still gives financial discipline a central role. Investment money creates obligations. A founder needs to make decisions early and know what each expenditure is intended to accomplish. The office furniture receives no special exemption.
The teaching side of that outlook appears in his account of judging student ventures at Reichman University. Alongside Kobi Bentkovski and Yoav Oren, he reviewed eight projects in a business class led by Shlomi Lahana. He described evaluating market understanding, competition, business models and the quality of the pitches.
Those categories make a useful companion to the earlier 100-second event. Getting someone’s attention is the opening task. Explaining the market and the business gives the conversation somewhere to go. Gross has worked on both sides of that exchange, helping arrange pitches and later evaluating them.
“Startups should be managed like real businesses.”
Yisrael Gross
The office that brought him home
One office announcement carried a more personal register. In January 2025, Gross said the business had opened a new office in Jerusalem. He described himself as born and raised in the city and the opening as a return to where his journey began.
He paired that return with plans beyond Israel. The business was expanding globally, he wrote, while the Jerusalem office created opportunities to work with talent in his hometown. His stated ambition was to collaborate and build locally as well as internationally.
The photograph accompanying the announcement shows Gross at a table, hands together, with an empty chair nearby. After the conference floors and investor panels, it is a quieter image. The hometown connection gives the office a significance beyond another pin on a company map.
More software, the same buyers
In May 2026, Gross returned to the problem of attention in an article about enterprise software. His argument was that cheaper, faster development creates more products without a corresponding multiplication of enterprise buyers. Building applications and acquiring customers face different constraints.
He focused on trust, distribution, security, integration and the ability to get through procurement. The argument has a familiar business-development concern underneath it. A feature can be demonstrated. A customer must decide whether the product belongs inside an existing organization.
His writing that month also examined AI economics and the operational demands of running AI systems. He emphasized efficiency and control. Those are positions he argues for, rather than a scorecard of outcomes. They show where his attention has moved as the market around his work changes.
On May 25, ammune.ai announced an AI Governance Platform intended to discover, map, monitor and govern AI-connected enterprise activity, including unmanaged systems often called shadow AI. The announcement identified Gross as CEO. His central observation was straightforward: “AI adoption is happening faster than enterprise visibility.”
By June, his writing identified him as founder and managing partner of TYH Investments and CEO of Ammune.ai. The roles put him near two recurring decisions: which technologies deserve backing, and which products an organization can put to work.
The route from a community gathering to those decisions is less mysterious than the technology vocabulary suggests. Gross’s story contains actual meetings, a timed pitch, international introductions and a customer who brought further introductions. He keeps returning to the point where an idea needs another person’s participation. The door opens. The conversation still has to be worth having.