TRL vs MRL: your prototype works, and that is not the question anyone is asking
Founders pitch TRL 8. Buyers hear MRL 4. The gap between those two numbers is where deeptech deals, and deeptech companies, quietly die.
Every deeptech pitch deck has the same slide. A little ladder, a highlighted rung, and a proud number: TRL 7, TRL 8. The founders have learned to speak technology readiness because the grant world demands it. Then they walk into an industrial buyer or a serious investor, recite the number, and wonder why the room stays polite and unconvinced.
The room is unconvinced because it is listening to a different scale. Technology readiness measures whether the science works. Manufacturing readiness measures whether the thing can be built, shipped, and serviced. Founders live on the first scale. The people writing the cheques live on the second.
Two ladders, two different questions
TRL comes from NASA and asks one question: how proven is the technology. Level 1 is an idea on a whiteboard. Level 9 is a system proven in operation. It is a good scale for what it measures, and Europe's funding system runs on it, which is why every founder can recite their level by heart.
MRL asks a colder question: can you make it. Not once, in the lab, with the inventors present. Repeatedly, at a price, with documentation, by people who did not design it. I wrote the full MRL walkthrough separately. The short version: a working prototype is around level 4 of 10, and the top of that ladder is where the money and the pain are.
Why founders overquote and buyers under-listen
The asymmetry is built into how deeptech companies grow up. Grants evaluate TRL. Papers demonstrate TRL. The founding team spent a decade pushing the science up one ladder and never had a reason to look at the other one. So the pitch leads with TRL 8, delivered by a company that is MRL 4, and everyone in the room who has ever bought hardware knows exactly what that combination means: years of expensive work still ahead.
Buyers rarely say this out loud. They say the timing is not right, or the budget cycle is difficult. What they mean is: your technology is impressive and your product does not exist yet, and I am not paying to find out which one wins.
The valley of death lives between the ladders
Here is the part the policy papers miss. The famous valley of death is usually described as a funding gap between research and market. In practice it is a translation gap between the two scales. Moving TRL costs research money, which Europe provides generously. Moving MRL costs production money, which only flows against commercial proof, which requires a product, which requires MRL. Round and round.
The companies that escape do it by refusing to climb one ladder at a time. They push manufacturing readiness while the technology is still maturing: process documentation, second-source suppliers, test procedures, costing, while the scientists are still perfecting the science. Boring work, done early, is what turns a demo into a business.
Quote both numbers, always
This is the simplest credibility trick in deeptech, and almost nobody does it. In your deck, your data room, and your customer conversations, state both levels and your plan for each: TRL 7, MRL 5, here is what 6 costs, here is when we reach it, here is the customer commitment that funds it.
Two honest numbers beat one impressive number every time. The buyer who hears a founder volunteer their manufacturing readiness, with a plan, relaxes. They have found one of the rare companies that knows what game it is actually playing. It signals the same thing a supplier qualification does before the audit even starts: these people will not waste my year.
The commercial engine climbs the second ladder
Notice what the MRL climb is made of. Not just tooling and test rigs, but orders. Customer commitments. Paid pilots and signed letters that unlock the production investment. The second ladder is climbed with commercial proof, which means the gap between TRL and MRL is, at its core, a sales problem wearing engineering clothes.
That is the work we do at SLSCRW: building the commercial engine that gets deeptech from impressive prototype to purchase orders that fund production. If your technology is at 8 and your manufacturing is at 4 and your pipeline is at zero, we should talk. That specific combination is exactly what we exist for.