# Rain Capital

> Rain Capital is a VC fund in Palo Alto backing Cyber Security and Software. See 25 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Palo Alto, United States
- Total investments: 25
- Last investment: Jun 2026
- Lead investor: 0%
- Fund size: $10M
- Last fund: Jun 2018
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/rain-capital/
- X (Twitter): https://twitter.com/rain_capital
- Website: https://www.raincapital.vc/

Rain Capital is an early-stage venture capital fund focusing on transformative technologies in the cybersecurity, ai, and analytics space. It is also committed to discovering, fostering, and supporting the next generation of women entrepreneurs.

## Contacts

5 contacts available for Rain Capital. Shizune tracks 4 team members at Rain Capital. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/rain-capital?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Cyber Security | 9 | 36% |
| Software | 6 | 24% |
| Artificial Intelligence | 6 | 24% |
| Security | 5 | 20% |
| Network Security | 5 | 20% |

29 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 12 | 48% |
| Series A | 9 | 36% |
| Series B | 2 | 8% |
| Pre-Seed | 1 | 4% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 17 | 68% |
| Israel | 3 | 12% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Amena Zhang | Partner | 0 | https://shizune.co/investors/profile/amena-zhang |
| Charisee Castagnoli | Venture Partner | 0 | https://shizune.co/investors/profile/charisee-castagnoli |
| Chenxi Wang | Managing General Partner | 6 | https://shizune.co/investors/profile/chenxi-wang |
| David Cross | LLP Partner | 0 | https://shizune.co/investors/profile/david-cross-4 |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Straiker | Straiker builds AI-native security solutions tp protect customers from a spectrum of security & safety risks. | $64M | Series A | Jun 29, 2026 |  |
| Clario | Clario is the first platform designed to remove enterprise data ROT, or redundant, out-of-date, and insignificant files that covertly impair AI performance, drive up expenses, and remain in systems as undetected liabilities. | $6M | Seed | Jun 17, 2026 |  |
| Manifold | Manifold Security offers an agentless AI Detection and Response (AIDR) platform for securing autonomous AI agents on enterprise endpoints.It captures agent behaviors in real-time, including API calls, file access, command execution, and interactions with external services like MCP servers or databases. Security teams gain visibility intoagent-tool-system relationships, mapping connections to internal and external resources without new infrastructure, gateways, or proxies. | $8M | Seed | Mar 18, 2026 |  |
| Clover Security | Clover Security delivers design-led product security, using AI agents to embed security into the earliest stages of development, replicating the thinking of experienced security architects to surface risks early, anticipate flaws, and make software products secure by nature. | $30M | Series A | Nov 25, 2025 |  |
| Fleak | Fleak is a serverless API builder tailored for creating AI data workflows effortlessly. It enables users to quickly develop and deploy API backends with a single click. Leveraging a low-code workflow builder, Fleak simplifies request payload manipulation using SQL, integrates seamlessly with LLM or embedding models, and supports invoking AWS Lambdafunctions. Fleak excels in handling parallelization and concurrency, automatically optimizing performance for high throughput across all nodes. This ensures scalable and reliable API deployment without requiring users to manage multithreading or load balancing. Outputs can be delivered directly via synchronous HTTP responses or forwarded to third-party data storage systems like Snowflake and Pinecone, making Fleak production-ready for enterprise applications. | $6M | Seed | Oct 01, 2025 |  |
| SplxAI | SplxAI is a cybersecurity company specializing in automated security testing for AI chatbots, ensuring they remain safe from manipulation and data breaches. The platform continuously monitors and tests chatbots for vulnerabilities such as prompt injection, context leakage, social engineering, and other advanced threats. Key features includereal-time detection and mitigation strategies, multimodal pentesting capabilities (covering text, audio, and video), and comprehensive reporting tools that provide actionable insights for improving security. SplxAI's solution integrates seamlessly with existing security frameworks and platforms, making it easy to deploy and manage. By providing robust protection against a wide range of threats, SplxAI helps enterprises safeguard their AI-driven applications, maintain data integrity, and ensure compliance with industry standards. The company is committed to innovation, continuously enhancing its product to address emerging threats in the rapidly evolving AI landscape. SplxAI is trusted by forward-thinking organizations looking to proactively secure their AI assets and protect sensitive information. | $7M | Seed | Mar 26, 2025 |  |
| Tuskira | Tuskira provides cutting-edge threat defense system using a security mesh driven by AI. | $28.5M | Series A | Dec 04, 2024 |  |
| Simbian | Simbian integrates secure and intelligent AI solutions into corporate processes across varied IT environments to maximise security coverage and speed up resolutions to security teams. | $10M | Seed | Apr 11, 2024 |  |
| Fleak | Fleak is a serverless API builder tailored for creating AI data workflows effortlessly. It enables users to quickly develop and deploy API backends with a single click. Leveraging a low-code workflow builder, Fleak simplifies request payload manipulation using SQL, integrates seamlessly with LLM or embedding models, and supports invoking AWS Lambdafunctions. Fleak excels in handling parallelization and concurrency, automatically optimizing performance for high throughput across all nodes. This ensures scalable and reliable API deployment without requiring users to manage multithreading or load balancing. Outputs can be delivered directly via synchronous HTTP responses or forwarded to third-party data storage systems like Snowflake and Pinecone, making Fleak production-ready for enterprise applications. | $1.4M | Pre-Seed | Apr 01, 2024 |  |
| ProjectDiscovery | ProjectDiscovery is an open-source software company that simplifies security operations for engineers and developers. Its user base is among the largest in the InfoSec community, and they are used by security and developer teams at top internet companies such as Fastly, Microsoft, CloudFlare, Gitlab, Facebook, IBM, and many others. | $25M | Series A | Aug 17, 2023 |  |

10 of 25 investments shown.

## Co-investors
- [Accel](https://shizune.co/investors/profile/accel) — VC Fund, 3 deals together
- [Active Capital](https://shizune.co/investors/profile/active-capital) — VC Fund, 3 deals together
- [Firebolt Ventures](https://shizune.co/investors/profile/firebolt-ventures) — VC Fund, 3 deals together
- [11.2 Capital](https://shizune.co/investors/profile/112capital) — VC Fund, 2 deals together
- [ClearSky](https://shizune.co/investors/profile/clear-sky) — VC Fund, 2 deals together
- [Glilot Capital Partners](https://shizune.co/investors/profile/glilot-capital-partners) — VC Fund, 2 deals together

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- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Rain Capital invest in?

Rain Capital invests primarily in Cyber Security, Software and Artificial Intelligence startups, most often at Seed and Series A stage. Most of the 25 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Rain Capital?

Public channels for Rain Capital include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### Who are the partners at Rain Capital?

The team at Rain Capital includes Amena Zhang (Partner), Charisee Castagnoli (Venture Partner) and Chenxi Wang (Managing General Partner). The Team section lists each member with their title, investment count and links.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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