Y Combinator and Microsoft partner to support the next generation of AI startups

Y Combinator (YC) and Microsoft are expanding their relationship to give founders building on Azure access to Microsoft Foundry and the infrastructure behind today's AI-native companies. YC uses Azure and Microsoft Foundry as part of its own AI development, and this expanded relationship brings more of that ecosystem to YC founders.

This reflects where the next generation of AI startups is heading. AI-native companies are launching with infrastructure requirements that previously only existed at scale, from training models and designing intelligent systems to delivering products that must scale reliably from day one.

Within the Y Combinator ecosystem, founders can access Startup credits, technical guidance, and go-to-market support through Microsoft for Startups to help move from early experimentation to enterprise-ready growth.

What this partnership provides to startups

For founders in the Y Combinator ecosystem, this expanded relationship strengthens access to Microsoft's startup resources, AI platform, and enterprise growth support through Microsoft for Startups.

Through Microsoft for Startups, eligible founders can access:

• Startup credits to build and scale
  Founders can access Startup credits to support building and scaling on Azure, helping offset infrastructure costs from early development through production AI workloads.¹
• Access to high-performance AI infrastructure
  Eligible YC founders can access high-performance AI infrastructure, including GPU resources launched with Y Combinator to support demanding AI workloads such as model training, inference, and high-throughput applications. This gives teams additional performance and flexibility as they move from experimentation to production.
• Advanced AI capabilities and model flexibility
  Founders can build using a broad set of AI services and models within a unified platform, enabling rapid experimentation while maintaining flexibility as technologies evolve.
• Hands-on technical guidance and architecture support
  Startups work directly with Microsoft engineers, architects, and advisors to design, optimize, and scale their systems, from architecture reviews and cost optimization to production readiness.
• Go-to-market and enterprise pathways
  Startups gain access to Microsoft Marketplace and the co-sell ecosystem, helping them reach customers, streamline procurement, and accelerate growth into enterprise environments.

Azure backs builders across the YC ecosystem, from students to Summer Fellows to funded founders-and internally, Microsoft Foundry accelerates many of our own agents and founder-facing tools.

Expanding choice across the AI ecosystem

For AI-native startups, the ability to move from experimentation to production is becoming increasingly important.

Startups increasingly need flexibility across models, tooling, and infrastructure. Through Microsoft platforms, founders can access leading AI models across providers within a unified platform, alongside enterprise-grade infrastructure. This gives teams the flexibility to choose the right model for each use case while building on a secure, scalable foundation without needing to rebuild as technology evolves.

This flexibility helps startups experiment faster, adapt as technologies evolve, and scale without rebuilding their infrastructure.

This approach allows startups to:

• Select the right model for their use case.
• Build agents and applications across a unified platform.
• Scale AI solutions on enterprise-grade infrastructure.

Why this partnership matters for the next generation of AI startups

Y Combinator has funded more than 6,000 startups, including companies like Airbnb, Stripe, Coinbase, and OpenAI. Beyond backing founders, YC has long influenced the technology decisions that shape the next generation of breakout companies.

Together, Microsoft and Y Combinator are helping define a new path for startup growth:

• Build with AI at the core from day one.
• Scale on infrastructure designed for real-world workloads.
• Connect earlier to enterprise customers.

This is especially important for AI-native startups, where infrastructure, performance, and distribution all play a critical role in success.

Building what comes next

The next generation of AI startups will be defined not only by the models they build, but by their ability to scale reliably, adapt quickly, and reach customers faster.

Through this partnership, Y Combinator and Microsoft are helping founders build on a platform designed for that future, combining AI capabilities, enterprise-grade infrastructure, and the support needed to move from experimentation to enterprise-ready growth.

If you're building with AI, Microsoft for Startups gives AI startups access to the infrastructure, AI capabilities, Startup credits, and go-to-market support to move from early experimentation to enterprise-ready growth. Apply for Microsoft for Startups today.

¹ If a committed balance remains at the end of the term, it may be invoiced. Startups then have a 12-month grace period to consume eligible services and purchases.