Seed Fintech companies in San Francisco

Mayfair helps you keep the cash your business needs for everyday operations and earn up to 5.02% APY on the rest. No maturity dates, lockup periods, or market risk. Plus, get up to $50m in FDIC insurance.*With decades of experience in accounting, finance and tech, Mayfair is the cash management platform trusted by businesses small and large, venture-backed startups, nonprofits, real estate companies, and many others to protect and grow their cash in volatile times.Featured in Reuters, TechCrunch, MarketWatch, Yahoo! Finance, and Nasdaq's TradeTalks. Backed by Tiger Global, Amity Ventures, and BoxGroup. To learn more, visit getmayfair.com.*Customers who wish to opt into the Enhanced Deposit Protection Program must choose an account provided by Third Coast Bank SSB, and will have their funds placed into deposit accounts across a network of FDIC-insured banks for up to the current standard maximum deposit insurance of $250,000 per eligible depositor, per receiving bank, for each ownership capacity or category, including any other balances you may hold at that receiving bank directly or indirectly through other intermediaries, including broker-dealers. Third Coast Bank SSB uses a third-party vendor and agent to help administer this deposit placement process. View the Participating Institution List for a list of the banks and savings associations with which Mayfair and Third Coast Bank SSB have a business relationship for the placement of deposits at receiving banks, and into which your deposits may be placed, subject to the Terms of Service and any opt-outs by Third Coast Bank SSB or you. The current limit for access to FDIC insurance on your funds through your account is $50 million (per depositor per ownership category), subject to change at any time by Mayfair. Terms and restrictions apply.

• Seed
• 315 employees
• Founded 2021

CRS is the independent data infrastructure platform powering modern credit decisioning.We unify credit, identity, fraud, and monitoring data into a single, standardized layer built for regulated environments. By partnering directly with leading credit bureaus and data providers, CRS replaces fragmented vendors, inconsistent formats, and brittle integrations with workflow-ready APIs teams can rely on.CRS supports the full credit lifecycle from lead generation and prequalification to underwriting, monitoring, and data furnishing. We help organizations decide when to use data, not just how to access it. Our platform is designed to reduce engineering overhead, improve risk visibility, and maintain compliance as decisioning evolves.More than 2,000 organizations use CRS to modernize credit operations without sacrificing control, accuracy, or scale.

• Seed
• 302 employees
• Founded 2019

We are a fund of 500+ Y Combinator alumni working together to invest in top Y Combinator startups.Our portfolio has gone on to raise from Andreessen Horowitz, Accel, Sequoia, Khosla, Lux, First Round, Initialized, Founders Fund, and many other top VCs.https://www.pioneerfund.vc

• Seed
• 280 employees
• Founded 2017

We're building the Unified Managed Account (UMA) for everyone.Today, UMAs (AKA SMAs) are a $3.7 trillion market — but they require $300K minimums, charge 1-3% annual fees, and only hold stocks and bonds. They exist exclusively for the wealthy, managed by human advisors through firms like Edward Jones ($2.2T AUM), Envestnet ($5.4T platform), and Morgan Stanley. Beem flips this. We deliver a Unified Managed Account to 166 million everyday Americans at $0 minimum — holding not just stocks and bonds, but also crypto, stablecoins, future pay, gig income, benefits, and store credit. All assets unified into one spendable balance, optimized by AI instead of a human advisor, and accepted at 900K+ locations and 40 airlines. What Robinhood did for stock trading, Beem does for your entire financial life.Traction: Profitable, 5M+ US customers, 500x LTV/CAC — all organic growth. $100M in network partnerships. Bank distribution reaching 8M fair credit US consumers/month. UMA stack includes: UMA (the account) → UPay (spend from any asset) → USDU (instant stablecoin settlement) → U-ID (zero-fraud biometric identity) and can be embedded in any LLM.

• Seed
• 198 employees
• Founded 2020

Compliance should support growth, not slow it down. Finalis helps independent dealmakers operate efficiently and confidently with fully-integrated compliance and dealflow infrastructure. We serve elite M&A advisors and placement agents.Finalis combines compliance, operational support, and dealflow infrastructure in one platform. Advisors receive hands-on support from experienced professionals. Our model is built to help you scale quickly and efficiently.Independent firms need flexibility without sacrificing standards. Finalis provides institutional-grade support with an independent mindset. Dealmakers stay focused on relationships and execution.

• Seed
• 139 employees
• Founded 2020