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Startup financing is a critical component of building and scaling your company. This section provides comprehensive guidance on various financing instruments and legal documents you’ll need as you raise capital.

Financing stages

As Brad Feld points out in his work on standardized venture funding documents, one of the challenges in startup financing is that “nobody has done the work to get all the various players in the room and standardize on one form.” While multiple standardized sets exist, each has its strengths and weaknesses.
Your earliest stage of funding, typically from personal networks. This stage often uses simpler instruments like:
  • Convertible notes
  • SAFE agreements
  • Shared Earnings Agreements
These instruments delay valuation discussions and convert to equity in future rounds.

Available document sets

The Startup Starter Pack draws from several standardized document sets, each with different philosophies and use cases.
A standardized set of legal documents that can be quickly deployed for a seed investment round. The Series Seed documents are maintained by Cooley LLP and represent a streamlined approach to seed financing.Best for: Seed rounds from 250K250K-2M with straightforward termsKey documents:
  • Term Sheet (Equity)
  • Preferred Stock Investment Agreement
  • Restated Certificate of Incorporation
  • Board and Stockholder Consents
Y Combinator provides two main sets of documents:
  1. SAFE (Simple Agreement for Future Equity): A revolutionary instrument that’s simpler than convertible notes, with no interest rate or maturity date
  2. Series AA: Equity financing documents for angel rounds, designed to be easy and streamlined
Best for: Fast, founder-friendly early-stage rounds
Model documents for seed financing that represent “light” preferred equity financing with simple, balanced terms that lean toward entrepreneurs.Best for: Seed rounds with high trust between parties and minimal complexity
National Venture Capital Association template documents for traditional venture capital investments. These are comprehensive, investor-protective documents.Best for: Series A and later rounds with institutional VCs
Shared Earnings Agreement (SEA) - an alternative to traditional equity financing designed for sustainable, profitable businesses.Best for: Bootstrapped companies seeking growth capital without equity dilution

Choosing your financing instrument

The right financing instrument depends on your stage, goals, and relationship with investors.

SAFE agreements

Quick, simple agreements that convert to equity later. No valuation needed upfront.

Convertible notes

Debt instruments that convert to equity at a qualified financing, with interest and discount.

Equity financing

Direct sale of preferred stock with immediate valuation and full investor rights.

Shared Earnings

Revenue-based financing that aligns incentives for profitable growth without dilution.

Key considerations

1

Understand your stage

Your financing stage determines which instruments are appropriate. Don’t use Series A documents for a friends and family round.
2

Consider founder dilution

Each financing event dilutes founder ownership. Convertible instruments delay but don’t eliminate dilution. Plan your cap table carefully.
3

Evaluate control implications

Equity rounds may include board seats, voting rights, and protective provisions. Understand what control you’re giving up.
4

Think about future rounds

Your current financing terms affect future rounds. Investor-friendly terms now make later rounds easier; founder-friendly terms preserve more control.
5

Get legal counsel

While these documents are standardized and open-source, you should still consult with experienced startup counsel before executing any financing.
No attorney-client relationship: These documents are provided as educational resources and templates. Using them does not create an attorney-client relationship. Always consult with qualified legal counsel before executing any financing documents.

Document library quick reference

Access the complete collection of financing documents:
Document TypeUse CaseAvailable Formats
Term SheetsOutline deal terms for equity or convertible roundsMarkdown, Word, OpenLaw
SAFE AgreementsSimple future equity agreementsWord, PDF
Convertible NotesDebt converting to equityMarkdown, Word
Stock Purchase AgreementsEquity investment documentationMarkdown, Word
Board ConsentBoard approval for financingMarkdown, Word
Stockholder ConsentStockholder approval for financingMarkdown, Word
Shared Earnings AgreementAlternative revenue-based financingMarkdown, OpenLaw
All documents in the Startup Starter Pack are open-source and available on GitHub. You can use them freely, modify them for your needs, and contribute improvements back to the community.

Next steps

Learn about term sheets

Understand how to structure and negotiate term sheets for your financing round

Explore SAFE agreements

Discover Y Combinator’s simple, founder-friendly financing instrument

Compare instruments

Learn the differences between convertible notes, SAFEs, and direct equity

Alternative financing

Consider revenue-based alternatives to traditional venture capital

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