David Marcus
Angel Investor
San Francisco, United States
David Marcus is a seed investor in San Francisco focused on Software and Payments. David Marcus is the co-founder and CEO of Lightspark. Previously he was the Head of F2 (Facebook Financial) & Board Member of Diem Association.
- Total investments:
- 21
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries David Marcus invests in
Stages David Marcus invests in
Countries David Marcus invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $350k–$8M
- Pre-Seed
- $4.3M–$10M
- Series A
- $5M–$20M
Investment Focus
Industry
- Software 6 (29%)
- Payments 5 (24%)
- Financial Services 5 (24%)
- E-Commerce 4 (19%)
- Apps 3 (14%)
Stage
- Seed 9 (43%)
- Series A 6 (29%)
- Pre-Seed 2 (10%)
- Series B 2 (10%)
- Angel 1 (5%)
Country
- United States 16 (76%)
- Israel 2 (10%)
- Argentina 1 (5%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Breezy is a Los Angeles-based startup offering an AI operating system tailored for residential real estate professionals. It automates workflows like creating branded comps, tracking client conversations, managing pipelines, and analyzing property development potential via its Underbuilt tool. | $10M / Pre-Seed / Feb 02, 2026 | ||
| Jolly is a rewards platform for the workplace that incentivizes employee performance. It implements performance-based incentives to increase employees utilization, compliance, referrals, and loyalty. | $16.5M / Series A / Feb 10, 2025 | ||
| Roxom is the first Bitcoin Stock, Commodities and Crypto Exchange in human history. | $4.3M / Pre-Seed / Jul 01, 2024 | ||
| Scoop is a creator of multi-platform tools that enable businesses and workers to take advantage of flexible work arrangements.The company's platform provides the tools and information required to reduce operational costs while giving workers the opportunity to work from any location, making it simple for businesses to run both an in-officeand remote environment.Scoop was established in January 2015 by Rob Sadow and Jonathan Sadow in San Francisco, California. | $8M / Seed / Nov 17, 2022 | ||
| Justt turns a clunky and cumbersome credit card dispute process into one that’s fair, simple and hands-free for merchants. Using machine learning and deep domain knowledge, Justt effortlessly flags incorrect chargebacks, and builds tailored solutions to gather and submit evidence on merchants’ behalf. | $70M / Series B / Nov 16, 2021 | ||
| Justt turns a clunky and cumbersome credit card dispute process into one that’s fair, simple and hands-free for merchants. Using machine learning and deep domain knowledge, Justt effortlessly flags incorrect chargebacks, and builds tailored solutions to gather and submit evidence on merchants’ behalf. | $50M / Series B / Nov 16, 2021 | ||
| Truebill enables users to manage their personal finances and improve their financial health. It is a platform that allows users to find, track, and manage their subscription services and recurring bills.To use Truebill, users must simply connect their bank account or credit card statement and instantly see everything they're paying for on arecurring basis. Any unwanted subscriptions can be canceled with just a few clicks.Truebill is backed by Y Combinator, Social Capital, Cota Capital, and Bessemer Venture Partners. The company was founded in 2015 and is based in San Francisco, California. | $5M / Series A / Oct 03, 2018 | ||
| Shone makes existing cargo ships autonomous. | $4M / Seed / Jun 26, 2018 | ||
| Prefer is a referral network for independent professionals to grow their businesses. | Series A / May 01, 2017 | ||
| Headnote is a venture-backed technology company that makes payment and accounts receivable ("AR") automation software for the legal industry. It’s as easy as PayPal or Venmo, but made specifically for the law firms and 100% compliant with all the rules governing online payments for lawyers federally and in all 50 states. Headnote allowslaw firms of any size to quickly modernize how they get paid resulting in dramatically faster payment times and collection rates. The average law firm in the US gets paid in 60 to 94 days, while Headnote customers get paid in 4 days on average. Headnote also automates how law firms track, manage, and oversee their AR and collection efforts, processes that have traditionally been manual, outdated, and time consuming. Headnote has it's headquarters in San Francisco, California and an additional office in New York. Headnote powers compliant ePayments for hundreds of US law firms as well as numerous non-competitive legal software partners. | Seed / Apr 01, 2017 | ||
| See all 21 investments → | |||
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FAQ
What does David Marcus invest in?
David Marcus invests primarily in Software, Payments and Financial Services startups, most often at Seed and Series A stage. Most of the 21 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 David Marcus's check size?
David Marcus typically joins rounds of $350k–$8M at Seed, $4.3M–$10M at Pre-Seed and $5M–$20M 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 David Marcus participates in.
How do I contact David Marcus?
Public channels for David Marcus 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 David Marcus last invest?
The most recent investment recorded for David Marcus closed in Feb 2026. Shizune tracks 21 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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