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Accelerator DeadlinesMay 6, 2026·1 min read·By StartupCorners

Key Accelerator Deadlines: Techstars, YC, and More Apply by Oct

Six major accelerator programs have application deadlines between August and October, spanning pre-seed through Series A stages.

Pre-seed

• On Deck, apply by Aug 30, 2026, Founders pre-product, idea-validation, https://www.beondeck.com/programs

• Antler, apply by Sep 30, 2026, Pre-team founders looking for co-founder + first cheque, https://www.antler.co/apply

• Entrepreneur First, apply by Oct 15, 2026, Talent-first / co-founder matching, https://www.joinef.com/apply

Seed

• Techstars, apply by Aug 15, 2026, Vertical accelerators across 40+ programs, https://www.techstars.com/accelerators

• 500 Global, apply by Sep 01, 2026, Late seed to Series A, growth-stage acceleration, https://500.co/programs

Series A

No Series A-specific programs in this cycle.

All Stages

• Y Combinator, apply by Sep 25, 2026, All sectors, especially AI, hard tech, fintech, climate, https://www.ycombinator.com/apply

This wave of applications presents strategic choices for founders at different stages. Pre-seed founders should prioritize programs matching their co-founder and validation needs, while seed-stage startups with traction should target Techstars' vertical expertise or YC's network effects. Apply early to multiple programs that align with your stage and sector focus to maximize acceptance odds.

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