Bookkeeping · Financial Operations · CFO Services
Accounting & Finance Services for VC-Backed Startups
We're the bookkeeping, controller, and CFO team behind
seed to Series B startups across the US.
Raise, hire, and scale with confidence.
I'm Kristen, a licensed CPA and the founder of Series K Financial Services.
I built Series K for a specific kind of startup: seed-to-Series B, technically complex, with real operational depth and investors who ask hard questions.
Our clients don't just need clean books. They need a financial partner who understands what the numbers actually mean and how to build the kind of financial infrastructure that holds up under due diligence. That's what we do. And it's the difference between a startup that scales and one that winds down too soon.
Here's how we can help.
Every engagement is built around what your startup needs right now, not a one-size-fits-all package.
Our services cover 3 core areas:
Bookkeeping &
Month End Close
Financial Operations
CFO Services
Why Founders Choose Series K
Not every accounting firm was built for the complexity of a growing startup.
✔ We specialize in startups exclusively
✔ We cover the full spectrum from bookkeeping through CFO
✔ We’re an extended member of your team, without the overhead
✔ We leverage modern accounting and finance tools
The financial partner your startup has been missing.
Your financial infrastructure isn't keeping pace with where your startup is headed. You're not sure your books would hold up under real scrutiny and your next raise is closer than you think.
Every month you wait is another month of messy data standing between you and a clean fundraise.