Greentown Labs vs Elemental Impact
How Greentown Labs and Elemental Impact compare on investment, equity, format, stage and timing. Every figure comes from the programs' own sites, verified November 4, 2026.
| Greentown Labs | Elemental Impact | |
|---|---|---|
| Equity | No equity | Not published |
| Deal terms | No equity. Incubator members pay rent; a third-party guide citing Greentown reports $650 per desk per month in Boston and $450 in Houston. Greentown Go cohorts are run with corporate partners (for example Shell and Technip Energies, Amazon, and ExxonMobil) and focus on pilots and collaboration rather than investment. | Amounts are set case by case for the Strategy and Project Tracks. The Strategy Track uses a SAFE, convertible note or direct investment with payments tied to milestones. The Project Track adds a Development-SAFE (D-SAFE) option. The Data Center Innovation Initiative funds $500K–$5M per project for up to 10 startups through 2027. |
| Format | Hybrid | Hybrid |
| Headquarters | Somerville, United States | Honolulu, United States |
| Stage | seed, series a, series b | pre-seed, seed, series a, series b |
| Sectors | climate, energy, hardware, industrials | climate, energy, mobility, agrifood, water, industrials |
| Duration | Varies by Greentown Go program; incubator membership is ongoing | About 9 months (Strategy Track); typically 12–18 months (Project Track and DCII) |
| Application cycle | Rolling incubator membership; Greentown Go programs run annual themed calls | Rolling, year-round |
Investment is the full standard package; where part of it is an uncapped SAFE, the equity stake covers only the fixed part (see deal terms). Terms change; confirm on each official site before applying.
About
Greentown Labs
Greentown Labs is a nonprofit climate tech incubator with prototyping and lab space in Somerville, Massachusetts and Houston, Texas. It takes no equity and charges members rent. It also runs cohort-based Greentown Go programs with corporate partners (Go Make, Go Build, Go Move, Go Energize, Go Grow) that pair startups with industry pilots and collaborations.
Notable alumni: Form Energy, Ecolectro, Unifuel
About
Elemental Impact
Elemental Impact (formerly Elemental Excelerator) is a nonprofit climate tech investor and accelerator. It funds startups worldwide with milestone-based investments and helps them land customers and deploy projects. It offers a Strategy Track for pre-seed and seed companies, a Project Track for Series A and later first-of-a-kind deployments, and a Data Center Innovation Initiative.
Notable alumni: Fervo Energy, Nth Cycle, Bedrock Energy, Noon Energy, Nitricity
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