Latest News
JUly | 2026
Better Auth Joins Vercel, Marking Rain’s Fifth Exit in Eight Months
Better Auth, the open-source authentication framework backed by Rain Capital, has joined Vercel to accelerate its work on open-source authentication and secure agent workflows. The partnership will give Better Auth greater resources and distribution while preserving its framework- and platform-agnostic approach. This milestone marks Rain Capital’s fifth portfolio exit in just eight months.
JUNE | 2026
HOT SUMMER MONTHS AND THE AGENTIC SHIFT
June was a defining month for AI infrastructure and cybersecurity. Rain Capital celebrated Straiker's $64M Series A, runZero's acquisition by Accenture in a $4.2B xOT security transaction, and Clario's emergence from stealth. Beyond our portfolio, we continued engaging with the cybersecurity ecosystem through Black Hat(HER), explored the rise of agentic security following Gartner's latest guidance, and shared enterprise AI security insights through our newest podcast.
JUN | 2026
STRAIKER SECURES $64M SERIES A TO ADVANCE AI AGENT SECURITY
Rain Capital portfolio company Straiker announced a $64 million Series A to expand its platform for securing AI agents. With enterprise adoption of autonomous AI systems accelerating, the company enables organizations to identify, evaluate, and protect agentic workflows before they introduce new security risks. The milestone highlights the increasing demand for AI-native security infrastructure.
Jun | 2026
Accenture to acquire runZero as part of a $4.2 bn OT security deal
Rain Capital portfolio company runZero has been acquired by Accenture alongside Dragos and NetRise in a combined ~$4.2B cybersecurity transaction, marking Rain Capital's fourth exit in eight months. The deal brings together exposure management, OT security, and software supply chain security to create a unified platform for protecting critical infrastructure against emerging AI-driven threats.
april - May | 2026
THE AI EXPLOIT ERA
May marked a major shift toward AI-driven security systems as exploitation workflows and agent runtime security rapidly moved into the mainstream. Rain portfolio company Astrix Security announced its reported ~$400M acquisition by Cisco, marking Rain Capital’s third exit in six months following Lakera and SPLX. Meanwhile, Rain leaders including Dr. Chenxi Wang, Dr. David Brumley, Sidra Ahmed Lefort, and David Cross contributed to industry conversations around AI exploitation, agentic enterprise security, and the evolving cybersecurity funding landscape.
JANUARY – MARCH | 2026
INFRASTRUCTURE SHIFT
Q1 2026 marked a shift toward agent-driven infrastructure, with the rise of Computer Use Agents (CUA) and agent-native systems redefining enterprise security around identity, posture, and observability. Portfolio companies including Straiker AI, Lema, and Claroty continue to build across this emerging stack as adoption accelerates.
November & December ｜ 2025
Portfolio Momentum
November and December marked strong milestones across the Rain Capital ecosystem. Zscaler announced its intent to acquire Rain portfolio company SPLX, while Clover Security raised $36M to accelerate its AI-native product security platform. Portfolio companies Astrix Security and Straiker AI were recognized on Fortune’s Cyber60 list, and Elisity earned a spot on Deloitte’s Technology Fast 500.
October｜ 2025
Portfolio Breakouts
October brought strong activity across the Rain Capital portfolio. Fleak.ai joined the Databricks AI Accelerator and raised a $5M seed round, while SPLX reported record growth. Rain companies Elisity and Seemplicity also received the SINET16 Innovation Award.
September | 2025
INDUSTRY SIGNALS
September brought key developments across the AI security landscape. Rain portfolio company Lakera was acquired by Check Point, while Straiker uncovered a new AI-powered offensive tool, and Rain partners Dr. Chenxi Wang and David Cross spoke at major industry events including TechCrunch Disrupt and the Madrona CIO Summit.
September | 2025
PORTFOLIO HIGHLIGHTS
August saw strong activity across the Rain Capital ecosystem. Seemplicity raised a $50M Series B to scale its security remediation platform, while SPLX exposed vulnerabilities during OpenAI’s GPT-5 rollout. Dr. Chenxi Wang also engaged the broader security community through SF Tech Weekend office hours and the Cyber Confidential podcast.