Reflex
The operating system for building mission-critical enterprise apps.
Founders
Not read from YC yet; the weekly run fills these in.
Same space
Adjacent
Overlapping tags, a different niche.
HatchetW24The orchestration platform for teams who ship.Shared: developer tools, open source, infrastructureActive
ManufactS25Cloud infrastructure for MCP servers and Claude / ChatGPT plugins.Shared: developer tools, open source, infrastructureActive
refineS23Open-source Retool for enterpriseShared: developer tools, open source, web developmentActive
RiftenS26Earned intelligence for every companyShared: developer tools, open source, infrastructureActive
OpenFoundryW24The fastest developer experience for building on open source AI.Shared: developer tools, open source, infrastructureActive
Also from W23 in AI
Batchmates in Winter 2023.
DAGWorks Inc.W23Open source tools & services for reliable AI Agents & AI ApplicationsAcquired
DesignbaseW23Design and build great interfacesActive
FernW23Instantly offer SDKs and API DocsAcquired
HeliconeW23LLM Observability for DevelopersAcquired
LangfuseW23Open source LLM engineering platformAcquired
LiteLLMW23Call every LLM API like it's OpenAI [100+ LLMs]Active
Outside YC
Similar companies on companies.fru.dev.
About Reflex
Reflex is the operating system for building mission-critical enterprise applications. Today’s enterprise stack is fragmented. Shipping an app requires stitching together multiple tools and coordinating across multiple roles. Reflex replaces that complexity with a single, unified platform to build, deploy, and manage production applications end-to-end. We empower teams to own the entire lifecycle of their apps — from idea to production — without needing specialized infrastructure, DevOps, or platform teams. We do this by providing solid, reusable abstractions at both the framework and infrastructure layers. Because we own the underlying open-source framework and the platform it runs on, we can manage the full lifecycle of the application seamlessly. With Reflex, teams securely connect to company data, use AI to build standardized applications on top of our open-source framework, and deploy with a single click to share across their organization. We’re replacing the fragmented enterprise stack — and the organizational bottlenecks that come with it. Founded by Alek Petuskey and Nikhil Rao, Reflex has powered over 1 million applications, earned 28,000+ GitHub stars, and is used by 30% of Fortune 500 companies for internal tools and data-driven applications.
San Francisco, CA, USA
Reflex: questions
Which YC batch was Reflex in?
Reflex was in Y Combinator's Winter 2023 batch (W23).
Is Reflex still active?
Y Combinator lists Reflex as active.
Where is Reflex based?
Reflex lists San Francisco, CA, USA as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.