A senior finance operator in your corner.
SumStone pairs more than 15 years of corporate accounting, finance, and M&A experience with a simple promise: no surprises, no hidden scope, and a partner who shows up every month.
Krunal Patel
Founder, SumStone Advisory PartnersKrunal has spent more than 15 years leading accounting, finance, and M&A work at venture- and private-equity-backed companies across IoT and hardware-as-a-service, semiconductors, SaaS, and consumer technology.
His work spans global multi-entity consolidation, acquisition accounting, ERP migrations, treasury, and investor reporting: the kind of experience most small businesses and early-stage founders never get access to.
He founded SumStone to bring that same operator-level rigor to founders, small businesses, and individuals who deserve more than a spreadsheet and a once-a-year conversation with their accountant.
A partner who shows up,
every single month.
Square dealing, always
No surprises, no hidden scope, no confusing invoices. You know exactly what you're getting, and we deliver it every time.
A senior operator, not a staffing solution
You work directly with a finance operator with 15+ years of experience, not a junior analyst handed your account after a sales call.
AI tools, human judgment
We use AI to automate reconciliations and speed up the close, and every deliverable is reviewed and owned by a senior finance operator.
Scales with you
Start with a tax return or bookkeeping. Add a controller. Grow into fractional CFO. One relationship, right-sized at every stage.
Built on the oldest idea in accounting.
Accounting began more than 5,000 years ago in Mesopotamia, where merchants and temple scribes counted grain, livestock, and goods with small clay tokens. To keep a count honest, they sealed the tokens inside a clay envelope and pressed marks on the outside, so anyone could check the total without breaking the seal.
From the very start, keeping books meant keeping records people could trust. That idea gave us our name: Sum, for the numbers we keep for you, and Stone, for work that lasts.
Our mark is the sum sign, built from cut stone. It is a small reminder of what we promise every client: honest books, a committed partnership, and work that is built to last.
The best way to see if we're a fit is a 30-minute conversation. No obligation, no pitch, just an honest look at where your numbers stand.