CH Reporter · Apr 2026
Profile article on Sean O'Bannon and Cranston's founder-market fit, YC backing, and early traction.
Company research
Public company, workplace, funding, and market signals
Updated Jul 29, 2026
Overview
Cranston is a San Francisco-based YC Fall 2025 startup building AI back-office software for CPA firms. It automates bookkeeping, tax prep, client follow-up, and practice-management workflows on top of existing accounting tools, with licensed reviewers approving outputs. No public CEO title was found; the visible leadership is the two co-founders.
Primary product
AI back-office software for CPA firms (bookkeeping, tax prep, client follow-up, and practice management)
Founded
2025
Headquarters
San Francisco, California, United States
Team size
1-10
Work style
Flexible
Industry
Software Development
Sub-industry
AI accounting / tax and bookkeeping automation software
Offices
San Francisco, California, United States
Business model
B2B SaaS
Usage-based pricing
Managed services
White-label accounting services
Funding
Stage
Seed
Total raised
$500K
Latest round
Seed Round · Dec 2025
Dec 2025
Nov 2025
Oct 2025
People & investors
Work & culture
Small founder-led team in San Francisco that ships quickly into live CPA-firm workflows, with a strong bias toward practical accounting expertise plus AI agents from day one.
Work style
Flexible
Compensation
Public YC job data shows posted compensation of $150K-$225K base salary plus 0.25%-1.00% equity, with roles open to new grads; exact compensation varies by role.
Benefits
Remote US roles
Equity on posted roles
Competitive salary on posted roles
New grads considered
Small founder-led team
Live customer work
Product & market
Pricing
$30/month per client book for bookkeeping; $40 flat fee per tax return; practice management included; white-label back office quoted per firm.
Differentiators
- —Works on top of the firm's existing stack instead of requiring a rip-and-replace
- —Human reviewer / CPA sign-off before filing or client delivery
- —White-label back office option on the firm's letterhead
- —Automates tax prep, bookkeeping, client follow-up, and practice management in one layer
- —Public pricing is simple and transparent
- —Maintains isolated firm workspaces and encrypted data
- —Source-linked automation across documents and accounting systems
Technology
QuickBooks
Drake
CCH Axcess
TaxDome
Gmail
Xero
UltraTax
AES-256 encryption
point-in-time backups
SOC 2 examination in progress
ERP integrations
banking integrations
Stripe
Customers
CPA firms
Accounting firms
SMBs
Mid-market companies
Startups
Competitors
Digits
Pilot
Bench
Botkeeper
inDinero
QuickBooks Live
Scale & contact
Estimated revenue
~$0.25M-$0.5M ARR (inferred from $21.5K MRR and early revenue stage)
Estimated monthly visits
1.1K
Traffic estimate as of Jul 2026
Latest news
Max Minsker on LinkedIn · Nov 2025
Max Minsker described the company launch, the founders' accounting/ERP backgrounds, and the pitch that Cranston's agents can handle core accounting workflows end-to-end.
Y Combinator · Nov 2025
YC launch describing the product, first customers, and traction; notes $21.5K MRR and more than a dozen customers automating back-office operations.
Sean O'Bannon on LinkedIn · Nov 2025
Sean O'Bannon announced the Product Hunt launch and described Cranston as a full-stack AI accounting firm that replaces routine accounting labor with autonomous AI systems supervised by licensed CPAs.
Max Minsker on LinkedIn · Oct 2025
YC live demo post describing Cranston's product demonstration in front of YC peers, partners, and investors.
Jobs and careers at Cranston AI
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