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Diadem Capital

Funding platformoperating company · company profile

Buffalo · Pre-Seed–Series A · 1 people tracked

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Investment thesis

Diadem operates as a curated deal-flow network connecting investors — including VC funds, family offices, lenders, and angels — with pre-vetted startups. Rather than relying on data scraping or LinkedIn profiles, it builds its platform from real meetings with founders and investors, then applies two layers of filtering (AI plus human review) to deliver high-signal, thesis-matched introductions. Each introduction is intended to come with a clear rationale. The platform also offers hands-off funding operations that let investors scale sourcing across their portfolios and find like-minded co-investors for active opportunities. It emphasizes warm, validated introductions that founders take seriously, and provides institutional-grade sourcing infrastructure without traditional fund management fees.

Invests inSector AgnosticGlobalNorth America

Source: firm website, verified Nov 8, 2026.

Stage
Pre-Seed–Series A
HQ
Buffalo, NY, US
Instruments
Equity · Debt

Team · 1 people

from public directories
Stephanie Rieben· Managing Partnerin𝕏

Co-founder and CEO of Diadem Capital, a venture ecosystem platform that has facilitated over $7B in fundraising for companies across venture capital, venture debt, and deal flow.

Frequently asked questions

What stage does Diadem Capital invest at?
Diadem Capital invests at the Pre-Seed, Seed, Series A stages.
What sectors does Diadem Capital focus on?
Diadem Capital focuses on Sector Agnostic.
Where is Diadem Capital located?
Diadem Capital is headquartered in Buffalo, US.

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