Modern finance operations.
AI-powered. Human-led.
Built for scale.
SISU is your trusted partner for finance workflow modernization, combining fractional CFO leadership, AI accounting automation, and operational transformation so scaling teams move faster without losing control.
AI is changing finance. You still need humans you trust.
Most growing companies don't need more software. They need someone who can untangle the mess, connect the dots, and help the team actually move forward.
That's where SISU comes in.
We combine strategic finance leadership, workflow transformation, and human-led AI implementation to help startups scale without losing their minds — or living in spreadsheets forever.
We're operators at heart: the kind of people who ask "why are we doing it this way?" and then actually fix it.
SISU is a Finnish word that captures grit, resilience, and determination. To us, it means staying calm in the chaos, asking better questions, and leaving every system better than we found it.
Integrity
You can count on us for accuracy, honesty, and follow-through, because trust is earned, not given.
Curiosity
We constantly ask: how can we make this even better? Progress is our favorite habit.
Collaboration
Every client, every number, every workflow challenge has a story behind it. We take the time to listen and adapt.
Innovation
Early adopters of Claude and OpenAI for finance operations, bringing modern intelligence to a traditionally manual world.
We're not here to sell AI hype or black-box automation. We're here to help you figure out what's actually useful, build systems your team will genuinely want to use, and create smarter operations without the chaos.
AI-enabled finance and accounting for startups that are scaling fast.
SISU combines fractional CFO leadership, accounting operations, workflow automation, and human-led AI implementation to help founders scale without finance becoming the bottleneck.
AI Finance Operations
Automate reconciliations, reporting, month-end close workflows, and operational finance tasks with AI systems guided by experienced finance leaders.
Fractional CFO Services
Strategic finance leadership, runway planning, KPI reporting, board materials, and investor-ready financial strategy for high-growth startups.
Startup Accounting & Bookkeeping
Clean GAAP-compliant financials, reconciliations, AP/AR workflows, payroll support, and accounting operations built to scale.
Month-End Close Transformation
Reduce close timelines from weeks to days through workflow redesign, SOPs, automation, and AI-supported finance operations.
Financial Modeling & Fundraising
Three-statement models, scenario planning, investor reporting, fundraising support, and board-ready financial storytelling.
Systems & Integrations
Connect and optimize QuickBooks, NetSuite, Rippling, Brex, Ramp, Stripe, payroll systems, and your broader finance stack.
AI handles the routine.
Humans drive the judgment.
We deploy custom AI agents, not off-the-shelf tools, that learn your accounting workflows and automate them end to end. Powered by Claude and OpenAI, governed by your SISU finance team. Because automation without oversight is operational risk.
Map and document your workflows
We audit and document every step of your finance operations, identifying automation opportunities and process gaps.
Optimize before you automate
Broken processes don't get faster, they get fixed first. We redesign workflows before AI touches them.
Deploy your custom AI agents
Claude and OpenAI agents handle reconciliation, data entry, and reporting, end to end, on your workflow.
Humans provide governance and strategy
Your SISU team reviews, interprets, and acts on outputs. AI accelerates. Humans stay accountable.
Transparent pricing that grows with you.
No surprises. No hidden fees. Every plan includes a dedicated SISU team and white-glove service.
- Monthly bookkeeping
- Bank reconciliations
- Financial statements
- Accounts payable & receivable
- Dedicated bookkeeper
- Everything in Foundations
- Fractional CFO (part-time)
- Month-end close optimization
- Basic AI workflow automation
- Quarterly board reporting
- Investor-ready financials
- Everything in Growth
- Full fractional CFO
- Custom AI agent deployment
- Zero-day close program
- SOP documentation
- Advanced financial modeling
- Fundraising support
- Everything in Scale
- Multi-entity consolidation
- Custom AI agent roadmap
- Dedicated CFO + team
- Series B/C readiness
- Audit preparation
Not sure which plan is right for you? Book a 20-minute call. We'll figure it out together.
Led by operators who've been in the room.
40+ years of combined experience across Fortune 50 and high-growth startups, brought together to build the finance partner they always wished existed.
Leticia is all about turning chaos into clarity, with a bit of flair. She asks the questions others skip, finds what's actually off-track, and delivers the no-BS fix with both precision and humor.
After shaping finance operations at Amazon and Marriott, and partnering with brands like Levi's and Dole, she brings enterprise-scale rigor and sharp operational instincts to every engagement. She knows what good finance infrastructure looks like at every stage, and exactly what it takes to build it.
At SISU, Leticia balances sharp strategy with the human side of change. She leads with insight, brings levity to even the messiest challenges, and always leaves things better than she found them.
"Leave it better, have a laugh, and always move forward. With Leticia, even the hardest operational challenges become your next breakthrough."
Shawna has spent 20+ years doing one thing: making finance a competitive advantage for the companies she works with.
She has guided companies through Series A and B raises, rebuilt cash-flow systems from the ground up, and deployed automated revenue infrastructure for global teams at Flip Shop and The Chernin Group. Her background spans public accounting, corporate finance, and advisory, the full picture, from clean books to boardroom.
At SISU, Shawna brings technical precision and a people-first approach to every engagement. Founders come to her in financial chaos. They leave with systems that run, reporting that's trusted, and a finance function built to scale.
"What this means for you: a CPA who has seen both sides, the audit room and the boardroom, and knows how to build finance systems that actually scale."
Results you can hold us to.
We don't make vague efficiency claims. Here are the concrete outcomes our clients have achieved.
"Clarity, alignment, and the right financial lens truly accelerate execution. Sisu's guidance has been central to our growth and scaling success."
"SISU consistently delivered high-quality board materials and financial insights, even through last-minute revisions and accounting updates. Their impact on our OpEx forecast and financial clarity has been substantial."
Ready to modernize your finance operations?
Tell us where you are: fragmented systems, a close process that takes weeks, no CFO support. We'll show you exactly what human-led AI finance modernization looks like for your company.
Most clients see measurable results within 30 days of onboarding.
Prefer email? Reach us at hello@sisunow.com