Top Startups Backed by Pioneer Fund

We are a fund of 450+ Y Combinator alumni working together to invest in top Y Combinator startups. Our portfolio has gone on to raise from Andreessen Horowitz, Accel, Sequoia, Khosla, Lux, First Round, Initialized, Founders Fund, and many other top VCs.

Apriora

Conduct live interviews with AI.

Bland

AI-phone agents at scale.

Clone

Musculoskeletal, superintelligent androids.

Every

All-in-one back office built for founders.

Exa

Building embeddings-based search infrastructure.

Human

Solving AI alignment.

Kaedim

3D asset content creation platform.

Onyx

Open source enterprise search & AI assistant.

pally

AI relationship managment.

Paradigm

A reimagined workspace with AI at its core.

PlayAI

Convesational AI for business.

Raindrop

AI monitoring.

Recall.ai

Universal API for real-time meeting data.

Suger

End-to-end rev engine for cloud marketplaces.

TigerEye

TigerEye is modern BI for GTM.

Vanta

Security monitoring platform.

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