VC & PE Glossary
What Is TRL (Technology Readiness Level)?
Updated
Definition
TRL (Technology Readiness Level) is a 1–9 scale measuring how mature a technology is — from basic research (TRL 1) to proven deployment in operations (TRL 9) — commonly used in deep tech and government funding.
Useful for: Founders, Investors
TRL (Technology Readiness Level) is a standardized nine-point scale describing how far a technology has progressed from scientific concept to reliable operational use.
How it works
NASA popularized TRL; defense and energy programs use it widely. Rough map: TRL 1–2 basic research; TRL 3–4 lab proof of concept; TRL 5–6 relevant environment demos; TRL 7–8 system prototype and qualification; TRL 9 deployed system proven in operations. Hardware, climate, and biotech startups cite TRL in grants and VC decks.
Technical diligence often includes independent TRL assessment — founders may claim TRL 6 while reviewers see TRL 4 without manufacturing at scale. Each jump typically requires capital, time, and specialized partners.
Software startups borrow TRL loosely; pure SaaS rarely needs formal TRL but deep tech with physical components benefits from honest scoring.
Why it matters
- Founders: Align roadmap milestones with TRL jumps — each level implies different spend and risk. Government SBIR and ARPA-E programs gate funding by TRL bands.
- Investors: Technology risk pricing ties to TRL gap between current state and commercial deployment.
Common mistake
Equating a polished investor demo with high TRL. Demo in conference room is not TRL 7 operational environment unless specified conditions are met.
Related ideas
See also technical diligence, technology risk, techbio, and manufacturing scale-up.
Related terms
- Technical Diligence — Technical diligence is investor-or buyer-led review of a company's product, architecture, code quality, security, scalability, and engineering team — to validate that the technology can support the business plan.
- Technology Risk — Technology risk is the chance that a startup's product fails technically — cannot be built, does not scale, loses to a better architecture, or faces security or IP barriers — undermining the investment case.
Common questions
Short answers for founders, LPs, and operators