How to Apply to Third Derivative in 2026

To apply to Third Derivative, submit the startup application on its site. Admissions runs a research-team review of climate impact and techno-economics, a first-round interview, an ecosystem feedback round, then a final interview with a pitch. Third Derivative says the process takes about three months and that it accepts startups multiple times per year (Third Derivative).

Here is how to apply to Third Derivative in 2026, and the structural fact most applicants get wrong. Third Derivative is RMI's climate accelerator, and it does not write one standard check.

Its startup pages publish no equity requirement, no fee, and no standard cash award (Third Derivative). They describe access to financing plus investor and corporate connections instead.

Treat D3 as a syndication engine, not a check-writing accelerator. You are not applying for a fixed amount at a fixed price. You are applying to be matched into a group of investors and corporates who might each fund you, deploy you, or neither.

How to apply to Third Derivative in 7 steps

Third Derivative publishes a staged admissions process, and the two steps that decide your outcome both happen before you open the form.

1. Clear the four eligibility gates. Third Derivative requires at least two full-time employees, a working prototype at Technology Readiness Level 4, a for-profit company, and no remaining basic-science risk (Third Derivative).
2. Pick your route. The general program welcomes applicants from around the world (Third Derivative). The Future Industries Partnership prioritizes Southeast Asia, especially Singapore, Indonesia, and Malaysia, plus India and the Middle East, and also considers startups elsewhere that want to expand there (Third Derivative).
3. Submit the startup application. Both routes funnel into the same form: the Future Industries Partnership page directs founders to the Third Derivative startup application (Third Derivative).
4. Pass the research-team review. The research team assesses climate impact, techno-economics, business model, and how you sit against competitors (Third Derivative).
5. Take the first-round interview. Bring your technology readiness level and the names of the corporates or utilities already testing your product.
6. Go through the ecosystem feedback round. D3 routes your company to its ecosystem for feedback between the two interviews. This is the stage where the syndicate around you starts forming.
7. Do the final interview and pitch session. Stages 4 to 7: Third Derivative.

Budget roughly three months from submission to decision, and note that Third Derivative accepts startups multiple times per year (Third Derivative).

Third Derivative equity terms: nothing is published, so ask directly

Third Derivative publishes no equity stake, no participation fee, and no standard investment amount on its current startup pages.

Do not fill that blank with a number from a third-party blog. D3 describes access to financing, investor and corporate connections, and follow-on funding opportunities rather than a defined instrument (Third Derivative).

What is published is the network, and the duration. The accelerator runs 18 months and provides access to RMI's network of more than 600 experts, alongside corporate partners, investors, and policymakers (Third Derivative).

General column: Third Derivative. Partnership column: Third Derivative.

Put the terms question in writing before the final pitch. An unpublished deal is not a bad deal, but it is an unknown one, and you cannot model dilution against a blank.

What the Third Derivative application actually screens for

Third Derivative names five selection criteria, and one of them is about D3 rather than about you.

• Potential climate benefit: the emissions case, assessed by a research team rather than a partner's instinct.
• Techno-economic pathway: whether the unit economics scale and stay viable, not whether the science works.
• Whether D3 can help you raise: the ability of Third Derivative to help you raise capital is itself a criterion.
• Corporate-partnership and commercialization fit: whether a corporate in the network could realistically deploy you.
• Ecosystem fit: whether you work inside a collaborative program.

All five criteria: Third Derivative.

That third criterion is the one to write your application around: D3 is partly screening whether its own syndicate can fund you, not only whether you are good. Make the raise legible, name the round, and name the counterparty.

Good: "We are at TRL 6 with a paid 12-month pilot at a cement producer in Gujarat, and we need a corporate offtake partner to reach a first commercial line." It names the stage, the counterparty, and what the syndicate would supply.

Bad: "We are a breakthrough climate technology company with a massive addressable market and a world-class technical team ready to scale globally." Nothing tells the research team whether the techno-economics scale or which corporate would deploy it.

Third Derivative acceptance rate: unpublished, but the cohort profile is the real bar

Third Derivative does not publish a current acceptance rate, so read the incoming cohort instead of guessing at a ratio.

The 2026 cohort is 26 startups spanning 13 countries, and roughly 90% of them are developing hardware, infrastructure, or materials-based solutions.

The readiness profile is the number that should reset your timing: the cohort averages roughly TRL 6.3, with 13 companies at TRL 7 or above and seven at TRL 8 to 9. Cohort figures: Third Derivative.

The published floor is TRL 4. The admitted average is 6.3. Applying at the floor means competing against companies two readiness levels further along, in a cohort selected for deployment rather than promise.

Third Derivative deadline 2026: no closing date is printed right now

There is no current dated deadline on Third Derivative's own site, and the live regional route states only that it is open.

As of August 2026, the Future Industries Partnership page says it is accepting applications and directs founders to the Third Derivative startup application, without printing a closing date (Third Derivative).

The most recent dated general-program deadline visible on D3's own site is April 2, 2024 (Third Derivative). That date is historical. Do not treat it as a 2026 cycle.

Work backwards from the three-month process instead of waiting for an announcement (Third Derivative). If you need to be inside a cohort by a specific quarter, submit a quarter earlier, and track the dated climate program cycles in our deadline calendar.

Is Third Derivative worth it? Run these three checks

Third Derivative is worth it when your bottleneck is corporate deployment, and a poor use of three months when your bottleneck is cash this quarter.

1. Is your blocker a corporate, not a fund? The published offer is investor and corporate matchmaking (Third Derivative). If your next milestone needs an offtake agreement or a pilot site, that is the asset. If it needs payroll cover, it is not.
2. Can you fund 18 months yourself? The program runs 18 months and no cash award is published (Third Derivative). Assume zero program capital when you build the model.
3. Does the alumni evidence match your stage? Cohort 24-1 had raised $69 million in combined debt and equity and created more than 500 climate jobs by its March 2024 announcement (Third Derivative). That is portfolio-level, not per-company: read it as syndicate throughput, not a promise.

If you are pre-prototype or pure software, this is the wrong door. A cohort where roughly 90% of companies build hardware, infrastructure, or materials is not selecting for your profile (Third Derivative).

When this matters for your raise

An accelerator that publishes no check size does not pause your fundraise, it overlaps with it. The three-month admissions window is three months of runway whether or not you get in.

Run the raise in parallel, on your own list. D3's criteria include whether it can help you raise (Third Derivative), so a live round with real investor conversations strengthens the application rather than competing with it. If you are running outreach anyway, Causo handles the fund matching and email drafting so a three-month process does not stall your pipeline.

Compare the other climate routes before you commit the quarter: how to apply to Elemental Impact, how to apply to Greentown Labs, and how to apply to LACI.

FAQ

How hard is it to get into Third Derivative? Third Derivative does not publish a current acceptance rate. The observable bar is the incoming cohort: 26 startups from 13 countries, roughly 90% building hardware, infrastructure, or materials, at an average technology readiness level of about 6.3, per Third Derivative. The published eligibility floor is only TRL 4, so the admitted average sits well above the minimum.

Does Third Derivative take equity? Third Derivative's current startup pages publish no equity requirement, no fee, and no standardized per-startup cash award, per Third Derivative. They describe access to financing, investor and corporate connections, and follow-on funding instead. Ask for the terms in writing at the first interview rather than assuming a standard accelerator deal.

How much funding does Third Derivative provide? No published amount. Third Derivative does not print a standardized check size and instead describes access to financing, investor and corporate connections, and follow-on funding opportunities, per Third Derivative. Model your runway as though no program check arrives, because none is promised.

When is the Third Derivative application deadline? There is no current dated deadline printed on Third Derivative's own site. As of August 2026 the Future Industries Partnership page says it is accepting applications and directs founders to the startup application without printing a closing date, per Third Derivative. Third Derivative says it accepts startups multiple times per year and that admissions takes about three months, per Third Derivative.

Is Third Derivative worth it for founders? It is worth it when your bottleneck is corporate deployment rather than cash this quarter, because the published offer is an 18-month program plus access to RMI's network of more than 600 experts, corporate partners, investors, and policymakers, per Third Derivative. Cohort 24-1 had raised $69 million in combined debt and equity by its March 2024 announcement, per Third Derivative. If you need money inside 90 days, run your raise in parallel.