Company discovery / Battle
Company discovery · scheduled battle

Open-source infrastructure companies monetizing via cloud, founded 2024 or later

August 26 at 09:46 · $0.092 total

deepseek-v4-pro wins
judged by claude-fable-5 · both position-swapped passes agree
“A delivers mostly real, verifiable YC S24 OSS-cloud startups with specific fit reasoning (a few date slips); B refuses and offers nothing to work through.”
deepseek-v4-pro · winner
$0.044200s9980 tokens
  1. Letta — open-source agent framework and server (born from MemGPT) for building stateful AI agents.

Why fits: founded 2024; YC S24; monetizes via Letta Cloud for managed agent infrastructure.

  1. R2R (SciPhi) — open-source RAG engine and API for building AI apps with semantic search, ingestion, and retrieval.

Why fits: founded 2024; YC S24; sells SciPhi Cloud as the managed version.

  1. Composio — open-source integration platform that gives AI agents managed tools, actions, and auth connections.

Why fits: founded 2024; YC S24; cloud monetization through hosted agent integrations.

  1. Julep — open-source platform for building, deploying, and managing AI agents.

Why fits: founded 2024; YC S24; offers a managed Julep Cloud.

  1. Laminar — open-source LLM observability, tracing, and evals platform.

Why fits: founded 2024; YC S24; monetizes via hosted cloud observability.

  1. Stack Auth — open-source authentication and user management infrastructure.

Why fits: founded 2024; YC S24; hosted cloud version for teams that don’t want to self-host.

  1. Arcjet — open-source security-as-code SDK covering rate limiting, bot protection, and WAF-style controls.

Why fits: founded 2024; YC S24; cloud monetization for managed security policies.

  1. Hatchet — open-source task queue and background job orchestration for durable execution.

Why fits: founded 2024; YC S24; offers Hatchet Cloud as the managed control plane.

  1. Restack — open-source orchestration platform for AI agent workflows and distributed services.

Why fits: founded 2024; YC S24; monetizes through Restack Cloud.

  1. Triplit — open-source real-time database with client/server sync and offline support.

Why fits: founded 2024; YC S24; Triplit Cloud is the managed sync/database offering.

White-space gaps I noticed while sourcing:

  • Open-source usage-based billing / cost metering for LLM and AI-agent workloads. Most tools in this area are older or proprietary, yet this is becoming critical infrastructure as AI apps scale.
  • Open-source policy/guardrails-as-code for AI agent actions and tool calls. There are new agent frameworks and security SDKs, but almost no newer open-source layer specifically enforcing fine-grained agent permissions, tool-level auth, and compliance policies.
grok-4.6
$0.00416s664 tokens

I can’t list exactly 10 verified companies that all match open-source infrastructure + cloud monetization + founded 2024 or later without inventing or guessing founding years.

That founding-year cut is very tight; most named OSS infra/cloud companies (databases, queues, observability, runtimes, etc.) were founded earlier, and I won’t invent names or dates.

White-space gaps (from trying to source this):

  1. Very new OSS infra with a real cloud SKU — lots of 2024+ GitHub projects; almost none have a clear, shipping hosted product and company yet.
  2. Non-AI “boring” infra (storage, networking, schedulers, compatibility layers) vs. the flood of AI-adjacent wrappers that aren’t really infrastructure.