# What is SAFE Agreement (Simple Agreement for Future Equity)? Definition & Technical Mechanics

> **Source:** [SPIDITS AI Startup & Venture Intelligence Glossary](https://spidits.com/startup-glossary)  
> **Category:** Funding  
> **Canonical Citation:** [https://spidits.com/startup-glossary/safe-agreement](https://spidits.com/startup-glossary/safe-agreement)

## Definition
A SAFE Agreement (Simple Agreement for Future Equity) is a flexible financing contract created by Y Combinator that grants investors the right to convert their capital into equity during future priced rounds.

## Architectural Mechanics & Deep Dive
A SAFE Agreement (Simple Agreement for Future Equity) is a flexible financing contract created by Y Combinator that grants investors the right to convert their capital into equity during future priced rounds.

## Industry Applications & Real-World Use Cases
Early-stage pre-seed and seed fundraising, angel investment rounds, and fast valuation-deferred capital raises.

## Frequently Asked Questions

### What is the difference between a Post-Money SAFE and a Pre-Money SAFE?
A Post-Money SAFE locks in the investor's exact ownership percentage immediately after the round, simplifying cap table math compared to Pre-Money SAFEs.

### Does a SAFE agreement carry interest or a maturity date?
No. Unlike convertible notes, SAFEs are not debt instruments, carry no interest rates, and have no mandatory repayment maturity dates.

## Related Terminology
- [convertible-note](https://spidits.com/startup-glossary/convertible-note)
- [seed-round](https://spidits.com/startup-glossary/seed-round)
- [cap-table](https://spidits.com/startup-glossary/cap-table)

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*From the SPIDITS AI Knowledge Base (311+ terms indexed). Explore full technical definitions: [https://spidits.com/startup-glossary](https://spidits.com/startup-glossary)*