Call documents often require a minimum or maximum TRL. Use this checker to interpret your stage, then match programmes or browse live opportunities on GRANTIBASE.
TRL checker
Understand Technology Readiness Levels 1–9 and how they typically map to Horizon Europe action types.
TRL 5
Technology validated in relevant environment
Breadboard validation in a simulated or relevant setting.
- Innovation Actions and mid-stage collaborative projects.
Indicative guidance — always read the specific call's TRL requirements.
All TRL levels (1–9)
- TRL 1: Basic principles observed. Scientific research begins; principles are formulated.
- TRL 2: Technology concept formulated. Practical applications are invented; speculation begins.
- TRL 3: Experimental proof of concept. Active R&D starts; analytical studies validate concepts.
- TRL 4: Technology validated in lab. Components integrated and tested in a laboratory environment.
- TRL 5: Technology validated in relevant environment. Breadboard validation in a simulated or relevant setting.
- TRL 6: Technology demonstrated in relevant environment. Prototype system demonstrated in a relevant environment.
- TRL 7: System prototype demonstration in operational environment. Prototype near or at planned operational system.
- TRL 8: System complete and qualified. Technology proven to work in its final form under expected conditions.
- TRL 9: Actual system proven in operational environment. Successful mission operations / competitive manufacturing.