Alex Atallah
Angel Investor
Menlo Park, United States
Alex Atallah is a co-founder/CEO of OpenRouter and a co-founder of OpenSea. Attended Stanford University.
- Total investments:
- 7
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries Alex Atallah invests in
Stages Alex Atallah invests in
Countries Alex Atallah invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $13M–$20M
- Series A
- $12M–$31M
Investment Focus
Industry
- Artificial Intelligence 5 (71%)
- Open Source 3 (43%)
- Blockchain 2 (29%)
- Machine Learning 2 (29%)
- Information Technology 2 (29%)
Stage
- Seed 5 (71%)
- Series A 2 (29%)
Country
- United States 4 (57%)
- Portugal 1 (14%)
- Cayman Islands 1 (14%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Gravity is an AI ad platform enabling AI apps to monetize conversations with contextual ads, targeting users through conversational intent. | $30.5M / Series A / Aug 06, 2026 | ||
| Mastra is an AI software that helps users to typescript complex operations and complete set of work using AI. | $13M / Seed / Mar 12, 2025 | ||
| Hyperbolic is the open-access AI cloud made for AI developers, providing fast, affordable access to compute, inference, and AI services. | $12M / Series A / Dec 10, 2024 | ||
| Nous Research is a decentralized AI startup that focuses on developing open-source, human-centric artificial intelligence models and tools. Its work encompasses large language model architecture, data synthesis, fine-tuning, and reasoning, aiming to align AI systems with real-world user experiences. In addition to model development, theorganization emphasizes decentralized AI training. It utilizes blockchain technology, specifically the Solana network, to coordinate and incentivize global participation in training its AI models. This approach allows individuals worldwide to contribute idle computing power for AI training, promoting a more distributed and collaborative development process. | $20M / Seed / Jan 10, 2024 | ||
| Lens Protocol is a composable and decentralized social network serving the Web3 community. It enables creators to build their own web3 social media platforms and accounts, giving them control over their connections with their communities and also ownership over their content. | $15M / Seed / Jun 08, 2023 | ||
| Together AI provides a cloud platform for developing, training, fine-tuning, and deploying generative artificial intelligence models using open-source technologies. Its services include serverless and dedicated model inference, GPU compute infrastructure, managed storage, code sandboxes, and model customization tools that support AI applicationdevelopment and production workloads. The platform also offers APIs and deployment options that enable developers and organizations to build, run, and manage language, image, audio, vision, and code models without maintaining underlying infrastructure. | $20M / Seed / May 15, 2023 | ||
| Blockchain gaming company | Seed / Sep 15, 2022 |
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FAQ
What does Alex Atallah invest in?
Alex Atallah invests primarily in Artificial Intelligence, Open Source and Blockchain startups, most often at Seed and Series A stage. Most of the 7 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 Alex Atallah's check size?
Alex Atallah typically joins rounds of $13M–$20M at Seed and $12M–$31M 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 Alex Atallah participates in.
How do I contact Alex Atallah?
Public channels for Alex Atallah 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.
When did Alex Atallah last invest?
The most recent investment recorded for Alex Atallah closed in Aug 2026. Shizune tracks 7 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
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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