Organization · Other
Diadem Capital
Diadem Capital is a funding platform based in the United States that connects startups with a network of venture capitalists, private lenders, and family offices. It simplifies the fundraising process for startups by facilitating both equity and debt fundraising.
Overview
What Diadem Capital does
What Diadem Capital is
Diadem Capital is a funding platform based in the United States that connects startups with a network of venture capitalists, private lenders, and family offices. It simplifies the fundraising process for startups by facilitating both equity and debt fundraising.
How it participates in the startup ecosystem
The current public profile supports funder and community capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Other
- Founded
- Founded in 2022
- Approximate age
- About 4 years
- Structured capabilities
- Funder · Community
- Last reviewed
- March 27, 2026
Official channels
Find Diadem Capital elsewhere
Open the official website or a supported primary organization account.
Capability profile
Diadem Capital as a funder
Investment thesis
Diadem Capital simplifies the fundraising process for startups by connecting them with a network of investors and lenders, leveraging their Wall Street expertise.
Focus narrative
Diadem Capital operates an AI-powered fundraising marketplace that connects startups with venture capitalists, private lenders, family offices, and angel groups. The organization primarily targets startups in the pre-seed to Series D stages, focusing on sectors such as enterprise SaaS and vertical AI. Their geographical focus includes the USA, Canada, Western Europe, Israel, and Australia, facilitating both equity and debt fundraising.
Value beyond capital
Diadem Capital adds value by providing a streamlined fundraising process, leveraging a network of over 1,000 investors and 250 lenders. Their platform reduces the time required for equity fundraising from 4-6 months to just 2-3 months, enhancing efficiency for startup founders.
Terms and economics
- Typical check
- $1,000,000–$100,000,000
Focus and fit
- Stages
- Pre-seed · Seed · Series A · Series B · Series C · Series D
Availability
- Currently deploying
- No
Portfolio and track record
- Recorded portfolio count
- 17
Portfolio context
Diadem Capital has successfully assisted various startups, including Roqad, which raised $7 million in Series A funding, and Persimmon Life, which engaged with Diadem Capital for fundraising, showcasing the effectiveness of their approach.
Capability profile
Diadem Capital as a community
Community overview
Diadem Capital is an organization founded by former Wall Street professionals, Stephanie Rieben and Joe Hammill, who transitioned to the startup ecosystem. The organization is based in the United States and focuses on simplifying the fundraising process for startups by connecting them with a network of investors and lenders. Diadem Capital operates as a fundraising advisory platform, facilitating connections between startups and a diverse range of investors, including venture capitalists, private lenders, family offices, and angel groups.
Community focus
Diadem Capital operates an AI-powered fundraising marketplace that connects startups with venture capitalists, private lenders, family offices, and angel groups. The organization primarily targets startups in the pre-seed to Series D stages, with a focus on sectors such as enterprise SaaS and vertical AI. Their geographical focus includes the USA, Canada, Western Europe, Israel, and Australia.
Member value
Members benefit from access to a vast network of over 1,000 investors and 250 lenders, enabling efficient fundraising processes. Diadem Capital reduces the typical equity fundraising time from 4-6 months to just 2-3 months, providing a streamlined approach to securing funding. The organization operates on a success-fee model, ensuring no upfront costs for founders.
Membership
- Recorded members
- 1,500
- Pricing models
- free
Format and cadence
- Modality
- online
- Schedule
- rolling-admissions
- Commitment
- light
Availability
- Membership state
- Accepting
Audience and fit
- Audience
- Founders · Investors
- Benefits
- network-access
- Program types
- other
- Selection criteria
- application
- Stages
- Pre-seed · Seed · Seed+ · Series A · Series B · Series C · Series D
Community activity
Notable members
Diadem Capital has worked with various startups, including Roqad, which successfully raised $7 million in Series A funding, and Persimmon Life, which engaged with Diadem Capital for fundraising.
Common questions
What to know about Diadem Capital
Upseed classifies Diadem Capital under the Other organization type. Its current public profile includes funder and community capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
March 27, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.