a16z speedrun
Also known as speedrun
Accelerator San Francisco, United States Run by Andreessen Horowitz Since 2023 speedrun.a16z.com
Overview
Andreessen Horowitz's accelerator, launched in 2023 with a games focus and opened to startups in all sectors in 2025. It runs two 12-week in-person cohorts a year in San Francisco, recently with about 60–70 teams each.
What startups get
US$500K for 10% via SAFE up front plus US$500K in the company's next round within 18 months, more than US$10M in partner credits, and a Demo Day.
Details
- Type
- Accelerator
- Run by
- Andreessen Horowitz
- Headquarters
- San Francisco, United States
- Format
- Cohort-based, in person (San Francisco)
- Who can apply
- Early-stage startups in any sector
- Standard terms
- $1M for 10%
- Stages
- Pre-seed, Seed
- Sectors
- technology, AI, games
- Started
- 2023
- Status
- Active
- Website
- speedrun.a16z.com
Venture funds
a16z speedrun also invests through venture funds managed by Andreessen Horowitz. Its latest fund, 2026 fund family (Growth, Apps, Infrastructure, American Dynamism, Bio + Health, other strategies), closed at $15B in 2026. It ranks #2 of 427 firms in the Venture Capital Fund Index by latest fund size.
Related programs
About this data
Compiled from the program’s website, announcements, and press reports as of October 9, 2026. Terms, credits, and eligibility change between cohorts; confirm them with the program before applying. Alumni are examples, not a complete list.