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Cranston AI

Full-service AI for accounting and finance

Cranston is a full service accounting firm. We handle bookkeeping, corporate taxes, and financial automations for SMB and mid market companies with AI software and a CPA team. We pull in context from all your company's apps & data, connect to existing systems of record and handle repetitive finance work. We provide an intelligence layer on top of systems like QuickBooks, NetSuite, SAP, or custom ERPs to ingest and categorize transactions, post entries, route approvals, and surface only items that need a decision. We automate bookkeeping with daily reconciliations, accruals, and a month end close reviewed by CPAs. We also handle Taxes end to end, from quarterly estimates to year end corporate returns, prepared from the same ledger and filed on schedule.
Active Founders
Max Minsker
Max Minsker
Founder
Co-Founder of Cranston AI. Previously owned a tax practice that filed 10,000+ tax returns.
Sean O'Bannon
Sean O'Bannon
Founder
Founder at Cranston AI (F25). Prev Stanford CS + AI, Founder + CTO at ReMatter, ex Databricks
Company Launches
Cranston AI: AI bookkeeping & taxes for startups
See original launch post

The Problem
Every founder has an accounting horror story.

Missed deadlines, unanswered calls, returns outsourced to someone you’ll never meet.

You spend hours entering transactions into Xero or QuickBooks, chasing receipts, and uploading documents. Your accountant lets deadlines slip, won’t pick up the phone, and somehow you’re made to feel like it’s your fault.

Accounting work hasn’t meaningfully changed since 2009. Manual spreadsheets, email threads, and one CPA juggling hundreds of clients means “good enough” books that really aren’t.

The Solution
Cranston AI is a full-stack accounting platform for startups.

Our AI agent ingests transactions, reconciles ledgers, flags anomalies, and prepares tax filings in real time. Every close and every return is reviewed by experienced CPAs.

What you get:
• Monthly bookkeeping & reconciliations
• Investor/board-ready reporting
• Full corporate tax prep & filing (included)
• Continuous anomaly detection & cleanup
• Setup in days; migrations handled

Proof & Traction
Startups using Cranston save ~30% on accounting costs and close 40% faster on average. Our team has filed 10,000+ corporate tax returns, and we’re already onboarding YC founders ahead of the October 15 extension deadline.

Backstory
My co-founder Max spent 5 years running a corporate tax practice and saw the same cycle everywhere: tight margins, offshored labor, and routine work. I’ve built ERP systems from the ground up. Together we’re building the accounting company we always wished existed, powered by AI.

Watch Our Demo: https://youtu.be/b_wfrw-UfjA

Call to Action
If your startup is buried in accounting busywork, or if your CPA has gone dark right before a filing deadline, we’d love to help (and offer generous discounts to YC companies).
👉 Book a demo: cranstonai.com
👉 DM us here or text me directly at 651-343-4146

We’re building a new kind of accounting company. We’d love for you to join us on this journey.

Cranston AI
Founded:2025
Batch:Fall 2025
Team Size:2
Status:
Active
Location:San Francisco
Primary Partner:Tom Blomfield