Max Mullen
Angel Investor @ Rebel Fund
San Francisco, United States
Max Mullen is a seed investor at Rebel Fund in San Francisco focused on Software and Information Technology. Max is the Co-Founder of Instacart. He started the company with two co-founders in 2012. Previously, he's worked for several startups including Schematic, an award-winning interactive agency which was acquired by WPP. Max is originally from Los Angeles where he graduated from the University of Southern California, studying entrepreneurship andcinematic arts.
- Total investments:
- 62
- Last investment:
- Lead investor:
- 2%
Last updated:
For AI agents: llms.txt
Industries Max Mullen invests in
Stages Max Mullen invests in
Countries Max Mullen invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $2.6M–$8.8M
- Series A
- $10M–$39M
- Series C
- $50M–$120M
Investment Focus
Industry
- Software 23 (37%)
- Information Technology 17 (27%)
- Artificial Intelligence 14 (23%)
- SaaS 11 (18%)
- FinTech 7 (11%)
Stage
- Seed 31 (50%)
- Series A 15 (24%)
- Series C 3 (5%)
- Series B 2 (3%)
- Series D 2 (3%)
Country
- United States 49 (79%)
- Canada 2 (3%)
- United Kingdom 2 (3%)
- Brazil 1 (2%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Viktor is an AI‑driven platform that acts as a virtual coworker inside messaging and collaboration tools, connecting to a broad set of business‑software systems to automate workflows, run tasks, and support knowledge‑work operations across marketing, operations, and engineering functions. | $75M / Series A / May 19, 2026 | ||
| Champ is your AI operations teammate that automates SOP-driven work across browsers, documents, and internal systems. | $8.5M / Seed / May 13, 2026 | ||
| Stedi is a global network for exchanging B2B transactions in a standard format. It provides companies with a free digital mailbox on the Stedi network, giving any company the ability to quickly connect and transact with its trading partners without having to go through painful point-to-point implementations. | $50M / Series C / Mar 24, 2026 | ||
| Multiply is the hybrid AI + human media agency specializing in B2B paid advertising on platforms like Google Search and LinkedIn. | $9.5M / Seed / Mar 18, 2026 | ||
| Unusual AI is an IT and Internet firm offering AI that personalise website according to visitors for more conversions. | $3.6M / Seed / Jan 02, 2026 | ||
| SweatPals is the operating platform for the fitness and wellness communities. | $12M / Seed / Oct 28, 2025 | ||
| Hero is a comprehensive daily assistant app designed to help users manage and run their life all in one place. It features integrated tools for grocery lists (with direct ordering via Instacart), to-dos, calendar events, habit tracking, weather updates, AI-powered search, notes, and notifications that alert even when the phone is on silent. | $3.5M / Seed / Sep 10, 2025 | ||
| Palabra AI is a cutting-edge AI-powered platform that enables real-time speech translation and voice interpretation across audio/video chats, live events, and streaming applications. | $8.4M / Pre-Seed / Aug 14, 2025 | ||
| Willow Voice is a technology company that develops voice input solutions using artificial intelligence. Its primary product is a dictation tool that converts spoken language into text in real time. The platform is designed to support everyday digital tasks by reducing reliance on manual typing. | $4.2M / Seed / Jul 15, 2025 | ||
| Crosby is a company with programmers from Ramp, Vanta, Meta, and Google joining attorneys. | $5.8M / Seed / Jun 17, 2025 | ||
| See all 62 investments → | |||
Co-Investors
About Rebel Fund
Rebel Fund is a seed-stage venture capital fund powered by an elite network of Y Combinator alumni along with a proprietary machine learning algorithm for statistically predicting startup success.
Rebel Fund Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Jared Heyman
Managing Partner
|
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Richard Sussman
Founding Strategic Partner
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FAQ
What does Max Mullen invest in?
Max Mullen invests primarily in Software, Information Technology and Artificial Intelligence startups, most often at Seed and Series A stage. Most of the 62 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 Max Mullen's check size?
Max Mullen typically joins rounds of $2.6M–$8.8M at Seed, $10M–$39M at Series A and $50M–$120M at Series C. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Max Mullen participates in.
How do I contact Max Mullen?
Public channels for Max Mullen 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 Max Mullen last invest?
The most recent investment recorded for Max Mullen closed in May 2026. Shizune tracks 62 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 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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