Accelerator and Program Deadlines: Week of September 9, 2026
Three programs are open for applications this week, spanning pre-seed co-founder matching to multi-stage funding from one of the world's most recognized accelerators. Here is what you need to know before the windows close.
Pre-Seed
- Antler (apply by Sep 25, 2026): Designed for pre-team founders who need a co-founder and a first cheque, Antler runs a residency program that brings early-stage builders together before committing capital. Apply at antler.co/apply.
- Entrepreneur First (apply by Oct 15, 2026): EF takes a talent-first approach, selecting exceptional individuals and facilitating co-founder matching before any company is formed. If you have strong domain expertise but no co-founder yet, this cohort is worth prioritizing. Apply at joinef.com/apply.
Seed
No seed-stage-specific programs are open with deadlines this week.
Series A
No Series A programs are open with deadlines this week.
All Stages
- Y Combinator Winter 2027 (apply by Sep 25, 2026): YC remains the benchmark accelerator for founders at any stage. This batch places particular emphasis on AI, hard tech, fintech, and climate, though all sectors are welcome. The Sep 25 deadline is the soonest of the three programs listed this week, so prioritize this application if you are considering it. Apply at ycombinator.com/apply.
How to Prioritize
Founders who already have a team and a defined problem should focus on Y Combinator first given its Sep 25 deadline, while solo founders or those still searching for a co-founder should treat Antler and Entrepreneur First as complementary options, with Antler closing on the same day as YC and EF offering a slightly longer runway through mid-October.