Justin Mateen
Angel Investor @ JAM Fund
Los Angeles, United States
Justin Mateen is a seed investor at JAM Fund in Los Angeles focused on Software and E-Commerce. Justin Mateen is the Cofounder and former CMO of Tinder, the world's largest dating platform. In 2021, and 2022 Business Insider ranked Mateen as the best early stage investor in the US, placing him at the number 1 spot on the top 100 list of US Seed Investors both years. In 2020, Forbes included Mateen on their list of the decade's top10 tech entrepreneurs. Fast Company has listed him as one of the most creative people in business.Founded in 2012, Tinder is the highest grossing app on Apple's app store since 2017 and was valued at over $40 Billion dollars in 2021.
- Total investments:
- 213
- Last investment:
- Lead investor:
- 24%
Last updated:
For AI agents: llms.txt
Industries Justin Mateen invests in
Stages Justin Mateen invests in
Countries Justin Mateen invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $1M–$9.5M
- Pre-Seed
- $400k–$3.9M
- Series A
- $6.8M–$30M
Investment Focus
Industry
- Software 17 (8%)
- E-Commerce 16 (8%)
- Health Care 14 (7%)
- Financial Services 12 (6%)
- FinTech 11 (5%)
Stage
- Seed 63 (30%)
- Series A 26 (12%)
- Pre-Seed 11 (5%)
- Series B 10 (5%)
- Funding Round 9 (4%)
Country
- United States 57 (27%)
- Mexico 9 (4%)
- United Kingdom 5 (2%)
- India 4 (2%)
- Brazil 4 (2%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Subquadratic is an AI company focused on automating and improving customer interactions and workflows using conversational AI. | $29M / Seed / May 05, 2026 | ||
| Fun offers to build a product ecosystem that leverages cross-chain decentralized wallets on the Odsy blockchain. | $72M / Series A / May 01, 2026 | ||
| Last Energy develops and delivers micro modular nuclear power plants designed to provide decarbonized, reliable energy through a full-service delivery model that spans design, construction, and operations. The company offers factory-produced modular plants, like its 20 MWe PWR-20 units, that can be deployed rapidly to serve energy-intensiveindustrial customers and utilities with baseload electricity and heat. Its services include long-term power purchase agreements that eliminate upfront capital for customers while enabling flexible siting and minimal resource requirements. Last Energy’s solutions support both behind-the-meter applications for industries and grid-scale energy projects for broader power delivery. The company integrates established reactor technology with its delivery process to help clients access consistent, carbon-free energy. | $100M / Series C / Dec 16, 2025 | ||
| Curative provides employer-based health insurance plans and healthcare services. The company delivers a plan with no copays, no deductibles, and a fixed monthly premium, aiming to make medical care easier to access and manage. It offers preventive care including an annual baseline visit, behavioral health services, primary and specialty care,prescription drug coverage, and integration with a network of providers. Curative also supports virtual care through its telehealth offering, enabling members to consult clinicians remotely for common health issues. Previously, the company was involved in large-scale diagnostic testing and vaccine distribution during the COVID-19 pandemic, and has since shifted focus to its insurance and care management services. | $150M / Series B / Nov 28, 2025 | ||
| Hidden Studios develops and advertises Fortnite Creative games, with 100M+ plays monthly. The company collaborated with prominent brands and creators, including Skydance, Snoop Dogg, and CaseOh, to deliver engaging gaming experiences. Hidden Studios maintains an active presence on YouTube, sharing content related to their Fortnite Creativeendeavors. | $1.5M / Pre-Seed / Apr 30, 2025 | ||
| Genetica provides exact product suggestions, guaranteeing that clients obtain the best product for their wants, biochemistry, and current in-store availability. | $2.5M / Seed / Apr 01, 2025 | ||
| Last Energy develops and delivers micro modular nuclear power plants designed to provide decarbonized, reliable energy through a full-service delivery model that spans design, construction, and operations. The company offers factory-produced modular plants, like its 20 MWe PWR-20 units, that can be deployed rapidly to serve energy-intensiveindustrial customers and utilities with baseload electricity and heat. Its services include long-term power purchase agreements that eliminate upfront capital for customers while enabling flexible siting and minimal resource requirements. Last Energy’s solutions support both behind-the-meter applications for industries and grid-scale energy projects for broader power delivery. The company integrates established reactor technology with its delivery process to help clients access consistent, carbon-free energy. | $40M / Series B / Aug 29, 2024 | ||
| Urbanic is a fashion brand that sells products online. | $150M / Series C / Nov 15, 2023 | ||
| Fun offers to build a product ecosystem that leverages cross-chain decentralized wallets on the Odsy blockchain. | $10M / Seed / Oct 22, 2023 | ||
| Whop is building a platform to service the internet economy. Millions of people are building new products that they are selling guerrilla style on social media and on forums throughout the internet. Whop gives these sellers a sleek storefront that can accept payments, seamlessly deliver digital products, and attract new customers visiting theirmarketplace. They currently handle almost $150M+ in yearly payments with thousands of active merchants. To view their open roles, please visit https://careers.whop.com | $17M / Series A / Jul 20, 2023 | ||
| See all 213 investments → | |||
Co-Investors
About JAM Fund
JAM Fund operates as a venture capital firm investing in visionary founders disrupting large spaces. It is Tinder Founder Justin Mateen's venture capital firm.
JAM Fund Contacts
| Name | Phone | Socials | |
|---|---|---|---|
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Justin Mateen
Founder
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FAQ
What does Justin Mateen invest in?
Justin Mateen invests primarily in Software, E-Commerce and Health Care startups, most often at Seed and Series A stage. Most of the 213 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 Justin Mateen's check size?
Justin Mateen typically joins rounds of $1M–$9.5M at Seed, $400k–$3.9M at Pre-Seed and $6.8M–$30M 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 Justin Mateen participates in.
How do I contact Justin Mateen?
Public channels for Justin Mateen 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 Justin Mateen last invest?
The most recent investment recorded for Justin Mateen closed in May 2026. Shizune tracks 213 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 Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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