Jonathan Weiner
Angel Investor @ SilverCircle
New York, United States
Jonathan Weiner is a seed investor at SilverCircle in New York focused on FinTech and Financial Services. Jonathan Weiner is the Founder of HumanX. He previously worked at FastPay as a Board Member. Jonathan Weiner attended the University of Massachusetts Amherst.
- Total investments:
- 63
- Last investment:
- Lead investor:
- 2%
Last updated:
For AI agents: llms.txt
Industries Jonathan Weiner invests in
Stages Jonathan Weiner invests in
Countries Jonathan Weiner invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $800k–$11M
- Series A
- $3.5M–$18M
- Series B
- $9.5M–$60M
Investment Focus
Industry
- FinTech 28 (44%)
- Financial Services 22 (35%)
- Software 14 (22%)
- Payments 13 (21%)
- Artificial Intelligence 9 (14%)
Stage
- Seed 27 (43%)
- Series A 12 (19%)
- Series B 10 (16%)
- Pre-Seed 4 (6%)
- Funding Round 3 (5%)
Country
- United States 42 (67%)
- United Kingdom 4 (6%)
- Armenia 2 (3%)
- Germany 2 (3%)
- Italy 1 (2%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Klipy offers a free API for GIFs, Clips, Stickers, Memes and AI content enabling platforms to boost user engagement and drive revenue. With advanced localization, KLIPY ensures content stays relevant across regions, from Tokyo to Toronto, tailoring Trending lists and search results to diverse audiences.Check out our features here -https://klipy.com/developers to get 100% free lifetime access to KLIPY's API and start boosting your revenue and user engagement. Ping us at hi@klipy.com | $3.8M / Seed / Jun 17, 2026 | ||
| Klipy offers a free API for GIFs, Clips, Stickers, Memes and AI content enabling platforms to boost user engagement and drive revenue. With advanced localization, KLIPY ensures content stays relevant across regions, from Tokyo to Toronto, tailoring Trending lists and search results to diverse audiences.Check out our features here -https://klipy.com/developers to get 100% free lifetime access to KLIPY's API and start boosting your revenue and user engagement. Ping us at hi@klipy.com | $1.2M / Seed / Apr 03, 2025 | ||
| Vendelux is the leading Event Intelligence Platform that helps marketers make more data-driven decisions around event attendance, sponsorship, and hosting. Customers match CRM data against a proprietary database of over 30,000 events, including speaker, sponsor, and attendee information, to easily find their prospects, customers, and competitorseverywhere they are going to be. | $14M / Series A / Nov 21, 2023 | ||
| Ledge is a command center for payments built for finance teams operating at scale.Ledge empowers finance teams with tools to centralize their payments data, get a real-time payments snapshot, automate multi-way reconciliation, identify problem transactions, accelerate their investigations, and dramatically lower the risk of losses, all withoutany engineering support.Finance teams regain control of payments and are freed to focus on strategic business impact, not manual payments work. | $9M / Seed / Feb 16, 2023 | ||
| OurRitual is a digital platform that transforms the way people strengthen and grow their relationships. | $2M / Pre-Seed / Oct 24, 2022 | ||
| Yellow Card is the easiest and most convenient way to buy and sell Bitcoin and other cryptocurrencies—no bank account required. | $40M / Series B / Sep 19, 2022 | ||
| Anzen is a management insurance and operations tool using real-time HRIS and SaaS integrations to identify and avoid management risks. The company was founded in 2020 and is headquartered in San Francisco, California, United States. | $9.3M / Seed / Sep 11, 2022 | ||
| Kompliant delivers end-to-end lifecycle compliance through a platform developed in partnership with the world’s leading payment processors and banks - bringing together proprietary technologies, purpose-built and configurable workflow, and integrations with best-in-class data providers to address the entire compliance lifecycle.Kompliant empowersrevenue through decisioning automation and compliant commerce. We help companies increase profitability by improving the efficiency of customer acquisition, underwriting decisioning and account activation. With enhanced verification, businesses can also improve customer conversion, decisioning cycle-time, business monitoring, and response to fraudulent activity.We offer a powerful set of platform services without requiring customers to spend money and time customizing their credit and risk policies. Using Kompliant services means they have more time to focus on driving revenue growth and portfolio expansion by making the onboarding, decisioning, activation, and monitoring of their customers a seamless experience. | $14M / Seed / Jul 29, 2022 | ||
| The world's first Fairness-as-a-Service company, offering tools that embed fairness into AI decision-making and reducing algorithmic bias. | $10M / Series A / Jul 18, 2022 | ||
| Sydecar builds tools that remove the headache of organizing private investments -- so you can focus on making deals, not spreadsheets. Their lightweight, powerful technology helps you to manage subscription docs, compliance, banking, tax reporting, and admin for all of your deals, of any size, in one place. | $8.3M / Seed / Apr 05, 2022 | ||
| See all 63 investments → | |||
Co-Investors
About SilverCircle
SilverCircle is a non-lead, stage agnostic and focused on the intersection of consumer, commerce, and technology. It is a powerful and helpful community comprised of world-class founders, serial entrepreneurs, top-flight operators, venture capitalists, executives, and angels. It was founded in 2021 and is located in San Francisco, California.
SilverCircle Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Stefan Weitz
General Partner
|
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FAQ
What does Jonathan Weiner invest in?
Jonathan Weiner invests primarily in FinTech, Financial Services and Software startups, most often at Seed and Series A stage. Most of the 63 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 Jonathan Weiner's check size?
Jonathan Weiner typically joins rounds of $800k–$11M at Seed, $3.5M–$18M at Series A and $9.5M–$60M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Jonathan Weiner participates in.
How do I contact Jonathan Weiner?
Public channels for Jonathan Weiner 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 Jonathan Weiner last invest?
The most recent investment recorded for Jonathan Weiner closed in Jun 2026. Shizune tracks 63 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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