# Middesk

> Middesk is a San Francisco-based business identity platform that helps banks, fintechs, lenders, and marketplaces verify the businesses they transact with. Its KYB APIs turn the slow, paper-heavy process of vetting a company into a real-time decision, powering onboarding at firms like Brex, Plaid, Mercury, Gusto, Affirm, and Shopify.

- **Founded:** 2018
- **Headquarters:** San Francisco, California, United States
- **Founders:** Kyle Mack (Co-founder & CEO), Kurt Ruppel (Co-founder & CTO)
- **Team size:** ~180 employees
- **Products:** Verify, Signal, TIN Match, Assess, Tax Registration
- **Notable:** Named to Fast Company's World's Most Innovative Companies 2025, Raised $77M+ across seed, Series A, and Series B, Powers KYB for many of the largest US fintechs

## Products & services

- **Verify** — Business identity verification API for KYB and onboarding, drawing on Secretary of State filings, IRS records, watchlists, and web data.
- **Signal** — Real-time risk and fraud signals on businesses, used to flag shell companies and high-risk applicants.
- **TIN Match** — Validates a business's Tax Identification Number against IRS records.
- **Assess** — Credit and underwriting data for evaluating small and mid-sized businesses.
- **Tax Registration** — Automated state-by-state payroll tax registration for employers expanding across the US.
- **Agent** — AI agent product (announced 2025) that automates compliance workflows on top of Middesk data.

## Achievements

- Named to Fast Company's World's Most Innovative Companies 2025
- Raised $77M+ across seed, Series A, and Series B
- Powers KYB for many of the largest US fintechs
- Y Combinator W19 graduate

## Latest updates

- **2025-03** — Named to Fast Company's 2025 World's Most Innovative Companies list.
- **2024** — Raised an additional $16M from Sequoia and launched a new Agent product for compliance automation.
- **2022-06** — Closed $57M Series B led by Insight Partners and Canapi Ventures.

## Links

- Website: https://middesk.com
- LinkedIn: https://www.linkedin.com/company/middesk
- Twitter/X: https://twitter.com/middeskhq
- GitHub: https://github.com/middesk
- Facebook: https://facebook.com/middesk

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Profile page: https://yespress.io/middesk
Published by YesPress — https://yespress.io
Last updated: 2026-05-28