Questdquestd

YC Infrastructure startups

337 Y Combinator companies in Infrastructure, 84 of them from the last four batches. Its share of recent batches is 10.6%, up from 6.1% in the four batches before. About 47% are AI companies by YC’s tags.

Signal
Crowded
Since 2025
123 vs 57 in 2023–24
Acquired or public
34%
Listed as inactive
24%

Share of each batch

Infrastructure companies as a share of each YC batch since 2015.

Newest entrants

Of 124 Infrastructure companies from batches up to 2021, YC lists 42 as acquired, 0 as public, 52 as active and 30 as inactive.

  • Acyclic Labs F26 · Agent swarms that make long-running tasks exponentially faster
  • Agent 37 F26 · Persistent sandboxes for agents like hermes, openclaw, claude code
  • Boat F26 · The best cloud VMs for billions of agents

Building in Infrastructure?

Open problems and funding on Questd for ai & infrastructure.

AI & Infrastructure problems worth solving

Infrastructure companies, newest first

337 companies

  • Acyclic Labs

    Agent swarms that make long-running tasks exponentially faster

    AI
    Fall 2026Infrastructure2London, England, United Kingdom
  • Agent 37

    Persistent sandboxes for agents like hermes, openclaw, claude code

    AI
    Fall 2026InfrastructureNew York City, NY, USA
  • Boat

    The best cloud VMs for billions of agents

    Fall 2026Infrastructure3Paris, Île-de-France, France
  • Bryel

    Perceptual reasoning models that are easily customizable

    AI
    Fall 2026Infrastructure2San Francisco, CA, USA
  • GrayPass

    Verify the expected person is still in control before sensitive…

    Fall 2026Infrastructure2Toronto, ON, Canada
  • Hopper

    Inference and post-training for realtime agents

    AI
    Fall 2026Infrastructure2San Francisco, CA, USA
  • Maritime

    The managed cloud for AI agents.

    Fall 2026Infrastructure3San Francisco, CA, USA
  • ObsessionDB

    Real-time data warehouse for agents

    Fall 2026Infrastructure5San Francisco, CA, USA
  • Orgo

    Computers for Agents

    AI
    Fall 2026InfrastructureSan Francisco, CA, USA
  • Pomerado

    Turn any website into an MCP for your agents, in minutes

    AI
    Fall 2026Infrastructure2San Francisco, CA, USA
  • RightNow

    Co-designing the fastest intelligence

    AI
    Fall 2026Infrastructure2San Francisco, CA, USA
  • sintem

    An agentic phone that does your busywork

    AI
    Fall 2026Infrastructure1BY, Germany
  • Stacktrace

    See and control what your agents actually do

    AI
    Fall 2026Infrastructure3San Francisco, CA, USA
  • Terse

    Durable state for AI agents

    AI
    Fall 2026Infrastructure2New York City, NY, USA
  • Tilion

    Super fast, unblockable browser infra for agents

    Fall 2026Infrastructure4San Francisco, CA, USA
  • Tilo

    A Linux-based, AI-native operating system.

    AI
    Fall 2026Infrastructure2San Francisco, CA, USA
  • Wondersearch

    Instant semantic search over your data without embeddings.

    AI
    Fall 2026Infrastructure2San Francisco, CA, USA
  • Archal

    API sandboxes, built for AI agents

    AI
    Summer 2026Infrastructure2San Francisco, CA, USA
  • Autoresearch, Inc.

    Autoresearch as a service: we solve your hardest measurable problems

    AI
    Summer 2026Infrastructure3San Francisco, CA, USA
  • Caution

    Hosting platform for software you can't afford to have hacked

    Summer 2026Infrastructure5George Town, George Town, Cayman Islands
  • Codag

    The AI gateway for cheaper, faster, permissioned agents.

    Summer 2026Infrastructure1San Francisco, CA, USA
  • Context.dev

    We give AI agents realtime web context via API

    AI
    Summer 2026Infrastructure6San Francisco, CA, USA
  • Decawork

    Training company-specific models that approve AI actions.

    AI
    Summer 2026Infrastructure2San Francisco, CA, USA
  • Dialogus

    voice AI agents that learn how your company actually works

    Summer 2026Infrastructure3San Francisco, CA, USA

Sector is YC’s own label in its public company directory. See the methodology, every sector side by side, or browse open problems worth solving.