Brainstorm Ventures
VC Fund
San Francisco, United States
Brainstorm Ventures is a VC fund in San Francisco focused on Software and Information Technology. Brainstorm Ventures was founded in 1999 with a mission to fund emerging technology companies and actively assist them in their development. Past portfolio companies include OpenTable (IPO), Zappos (acquired by Amazon), Me.com (acquired by Apple) and Mexico's first unicorn, KIO Networks. Most of Brainstorm's investments are in SiliconValley and in Mexico; however, Brainstorm Ventures also targets a select number of opportunities across the United States and Latin America.
- Total investments:
- 35
- Last investment:
- Lead investor:
- 0%
- Fund size:
- $4.3M
- Last fund:
Last updated:
For AI agents: llms.txt
Industries Brainstorm Ventures invests in
Stages Brainstorm Ventures invests in
Countries Brainstorm Ventures invests in
Round sizes
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Round size
- Seed
- $50k–$14M
- Pre-Seed
- $1M–$4M
- Series A
- $2M–$85M
Investment Focus
Industry
- Software 4 (11%)
- Information Technology 4 (11%)
- Artificial Intelligence 4 (11%)
- FinTech 3 (9%)
- Health Care 3 (9%)
Stage
- Seed 9 (26%)
- Pre-Seed 8 (23%)
- Series A 6 (17%)
- Series B 3 (9%)
- Funding Round 2 (6%)
Country
- United States 21 (60%)
- Mexico 3 (9%)
- Spain 2 (6%)
- Italy 1 (3%)
- Argentina 1 (3%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
Ariel Jadus
General Partner
|
General Partner | Total investments: 2 | Find email | |
Eduardo Rallo
Co-founder & Managing Director
|
Co-founder & Managing Director | Total investments: 0 | Find email | |
Keith Cox
Co-founder & Managing Director
|
Co-founder & Managing Director | Total investments: 0 | Find email |
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| BrainGrid enables you to convert half-baked ideas into build-ready specs and perfectly-prompted jobs that AI coding agents such as Cursor or Claude Code can complete quickly without breaking anything. | $1M / Pre-Seed / Mar 24, 2026 | ||
| Stylus Medicine is on a quest to create disease-treating agents for the next generation based on the groundbreaking work of its founders. The company is based in Cambridge, Massachusetts. | $85M / Series A / May 12, 2025 | ||
| Cafler is a online platform for delegated mobility. Their services include wash, MOT, refueling, and transferring services. They allow consumers to directly get their services from a seller over the internet using a mobile app. Garages and insurers can find a partner in Cafler who can help them generate more profit for their businesses by providinga variety of services related to delegated vehicle mobility that reduce their costs and the time spent on certain procedures at a competitive price. | $11M / Series A / Feb 24, 2025 | ||
| Terrain BioSciences is in the field of RNA-based therapeutics and vaccine development. Leveraging advanced AI and proprietary manufacturing platforms, Terrain BioSciences addresses the challenges of designing, selecting, manufacturing, and delivering optimal RNA sequences. Terrain BioSciences collaborates with over a dozen biotech firms to enhancethe expression, durability, and manufacturability of RNA sequences, significantly accelerating their path to clinical application. With a focus on personalized cancer vaccines and other RNA-based modalities, Terrain BioSciences is at the forefront of the next generation of programmable medicines. | $9M / Seed / Feb 12, 2025 | ||
| Bedrock Materials pioneers affordable sodium-ion batteries with revolutionary materials and production techniques, changing energy storage for a more sustainable future. | $9M / Seed / May 16, 2024 | ||
| Glaut is an AI-native customer survey platform that conducts in-depth, AI-moderated interviews with customers at scale. | $1.4M / Pre-Seed / Apr 29, 2024 | ||
| Klay is a music making platform that is focused on mobile devices and headquartered in New Castle, Delaware. | Venture - Series Unknown / Jan 31, 2024 | ||
| Ladder is a strength training app that provides a workout plan, every single day. Fitness-seekers can access a complete strength training program on their phone, learn from an expert coach, and engage with a community that shares a passion for fitness. The company is based in Austin, Texas. | $12M / Series A / Dec 04, 2023 | ||
| Class Companion is a new AI technology that allows professors to provide students with immediate, individualized feedback. | $4M / Seed / Oct 05, 2023 | ||
| Klay is a music making platform that is focused on mobile devices and headquartered in New Castle, Delaware. | Pre-Seed / Jul 19, 2023 | ||
| See all 35 investments → | |||
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FAQ
What does Brainstorm Ventures invest in?
Brainstorm Ventures invests primarily in Software, Information Technology and Artificial Intelligence startups, most often at Seed and Pre-Seed stage. Most of the 35 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Brainstorm Ventures's check size?
Brainstorm Ventures typically joins rounds of $50k–$14M at Seed, $1M–$4M at Pre-Seed and $2M–$85M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Brainstorm Ventures participates in.
How do I contact Brainstorm Ventures?
Public channels for Brainstorm Ventures include LinkedIn 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 Brainstorm Ventures?
The team at Brainstorm Ventures includes Ariel Jadus (General Partner), Eduardo Rallo (Co-founder & Managing Director) and Keith Cox (Co-founder & Managing Director). 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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