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Affiniti's 20- and 22-year-old founders raise $17M led by SignalFire just 6 months after an $11M seed | TechCrunch

May 20, 2025 - techcrunch.com
Affiniti, founded by Aaron Bai and Sahil Phadnis, is developing expense management software tailored for small businesses, similar to what tech startups have used for years. After raising an $11 million seed round, they secured a $17 million Series A led by Signal Fire. Affiniti provides customizable expense management credit cards and software to small businesses like pharmacies and auto dealerships, positioning itself as "v3" of fintech by offering analytics and advisory features. The Series A funding will support the launch of new features such as banking, bill pay, cash flow analytics, and software integrations.

The startup has grown rapidly, reaching 1,800 customers and $20 million in monthly transaction volume within 14 months. Affiniti aims to handle $1 billion in transactions by year-end, with revenue primarily from transaction interchange fees, SaaS software sales, and interest on short-term loans. Revenue reportedly grew 10x in a year, from $1 million to significantly higher. Other investors in the Series A include Contrarian Thinking Capital, TrueBill's Yahya Mokhtarzada, and Morning Brew's Austin Rief, with seed investors Indicator Ventures, Lightshed Ventures, and RiverPark Ventures also participating. Affiniti previously secured a $15 million debt facility, expandable to $50 million.

Key takeaways:

  • Affiniti, founded by Aaron Bai and Sahil Phadnis, provides expense management software for small businesses, raising $17 million in a Series A round led by Signal Fire.
  • The startup offers customizable expense management credit cards and software, aiming to provide "v3" fintech solutions with analytics and advisory capabilities.
  • Affiniti has grown rapidly, reaching 1,800 customers and $20 million in monthly transaction volume within 14 months, with a goal of $1 billion in transactions by year-end.
  • Other investors in the Series A include Codie Sanchez's Contrarian Thinking Capital, Yahya Mokhtarzada, and Austin Rief, with seed investors like Indicator Ventures and Lightshed Ventures also participating.
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