The bottleneck in AI is no longer compute. It is the silicon connecting it.

Sienna Venture Capital was founded in 2022 by Isabelle Amiel and targets early-growth technologies. Its team has collaborated for over a decade, launching multiple global funds and initiatives in the tech sector.

Empowering fearless founders shaping the future of tech.

Rein Security raises $25 million in a Series A co-led by Glilot Capital and Sienna Venture Capital, bringing its total funding to $35 million. The company’s runtime platform monitors AI agents’ code and resource access, governs their activity, and uses real-time guardrails to block harmful actions. Rein says revenue grew eightfold and its customer base fivefold since its January 2026 product launch, and its platform secures thousands of agents.

Oct 2026 · CTechNews article

Israeli chip company Xsight Labs raises $300 million at a $2.8 billion valuation. The semiconductor startup is gaining traction with global network operators and hyperscalers as demand surges for chips that can connect the massive computing systems powering artificial intelligence.

Jul 2026 · CTechNews article

Second Nature raises $22 million in Series B funding to expand its AI sales training platform. The Israeli startup uses conversational AI to help companies coach sales teams.

Oct 2025 · CTechNews article

Israeli startup Seemplicity raises $50 million to automate exposure management with AI. The company says its platform processes 1.5 billion findings daily as enterprises seek relief from mounting security workloads.

Aug 2025 · CTechNews article