University programme · Massachusetts, United States

Climate Circle Accelerator

Harvard Innovation Labs' September-to-May accelerator for climate ventures led by Harvard students, alumni, faculty or staff that are past the idea stage, with advisers, expert office hours, workshops and climate investor introductions.

Closed Run by Harvard Innovation Labs, Harvard University

Verified 18 October 2026 · From the programme's own pages

Terms

Funding
not published
Instrument
not published
Equity taken
not published
Programme fee
not published
Duration
not published
Cohort size
not published
Cohorts
not published
Delivery
Remote
Stages
Pre-seed, seed
Sectors
Climate
Open to founders from
not published
Perks
  • 1:1 founder-to-founder climate connections
  • i-lab venture advisers
  • Office hours with legal, accounting, sales and investor experts
  • Pro-bono legal matching
  • Introductions to climate investors

The 2026-27 programme starts with a mandatory virtual orientation in September 2026 and ends with the President's Innovation Challenge award ceremony in May 2027. Most support is one-to-one and scheduled around founders, with some group sessions. Funding, equity and fee terms are not stated on the page.

Application dates

Closed2026-27 cohort

2026-27 cohort: applications closed 24 June 2026.

Usual timing: Applications reopen in spring 2027.

Who can apply

  • A founder must be enrolled in a Harvard degree programme or hold Harvard alumni, faculty or staff status
  • For-profit and nonprofit ventures are both eligible
  • Ventures must be past the idea stage, with active users, established intellectual property, or written agreements with partners or funders
  • Mitigation and adaptation ventures are both welcome; a resilience-focused track starts in 2026-27
  • Stage: pre-seed, seed

What founders should check

  1. The programme does not publish how much equity it takes. Ask before you accept a place.
  2. It does not publish a fee. Ask whether you pay for desks, services or the programme itself.
  3. It runs remotely. Check the time zone of live sessions.
  4. The last window we track closed on 24 June 2026. Applications reopen in spring 2027.

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