Open-source finance for founders and funds
AI is changing what finance teams can build for themselves. Hemrock builds open-source finance software, teaches people to build with AI, and works directly with founders and funds on their models and their finances.
Open source for finance teams
Open source spreadsheets built to use with your AI, and investment management software that runs on your own infrastructure with your own AI provider.
AI for judgment. Software for exact math.
Web tools for building models, with AI support for understanding the outputs. Save to the web, share links for users, and export to a spreadsheet.
Cap table
How ownership changes through new equity, options, and conversions of SAFEs and convertible notes.
Exit waterfall
Determing what sharedholders get, dealing with liquidity preferences and structural details.
Fund economics
Forecasting investment returns and performance metrics for venture investors.
Learn by building
Learn from first principles so you can leverage your AI to build your own models and tools. Workshops are live, online, and recorded.
Cap Table Workshop
Live September 24, 2026A cap table you built from a term sheet, with rounds, SAFEs, and an option pool modeled correctly.
$175
per seat, live or recorded
- Next
- Sep 24
- Length
- 2 hours
- Format
- Live, hands-on
Exit Waterfall Workshop
Live October 1, 2026An exit waterfall you built and can explain: preferences, participation, caps, and conversion.
$175
per seat, live or recorded
- Next
- Oct 1
- Length
- 2 hours
- Format
- Live, hands-on
How to build fund infrastructure with AI
RecordingA scoped plan for your first fund-operations workflow, with the tooling and team setup to build it.
$75
per seat, live or recorded
- Next
- Recording
- Length
- 1 hour
- Format
- Live, hands-on
Work with me
I work directly with founders and funds on their models and financial tools, and additionally support venture funds as a fractional CFO and head of AI.
Fractional CFO
FundsOngoing finance leadership for venture firms, full or flexible for emerging managers.
Quoted
per fund
- Length
- Ongoing
- Covers
- Ops, reporting, compliance
- For
- Funds and SPVs
Working session
An hour on your model, your numbers, or your AI setup, or a review of a model or workflow you built with AI.
$395
per hour
- Length
- 1 hour
- For
- Setup, fixes, or a review
- After
- Recording and notes
Custom model
A revenue model, fund forecast, or cap table built for your business, delivered working and documented.
Quoted
typically $1K to $10K
- Length
- A few weeks
- Format
- Scoped after a call
- After
- Yours, documented
“I continue to use and recommend the Cap Table + Round + Exit model + other tools that [Taylor] provides. Some are free, all are valuable. (Have paid ~$300 and saved so much time and money over years as a Founder CEO, Angel, VC).”
Taylor Davidson
Fractional CFO for venture funds and an ex-VC, I’ve built financial models and tools since 2005 used by more than 55,000 founders and investors in 116 countries.