YCS25· AI· Devtoolsstagewise
The Open Source Agentic IDE
Founders
- Glenn TöwsFounder/CEO
- Julian GoetzeFounder/CTO
Same space
Competitors
Closest in what they build, same category.
ZenbuX26The extensible IDE for coding agentsShared: developer tools, open sourceActive
CodevisorW25The fastest native app for agentic engineering.Shared: developer tools, open sourceActive
VocodeW23Open source Voice AIShared: developer tools, open sourceAcquired
ReplitW18Collaborative in-browser IDEShared: developer toolsActive
BrowserOSS24The Open Source Agentic BrowserShared: agentic, open, sourceActive
Adjacent
Overlapping tags, a different niche.
TiptapS23The open-source document editor for humans and AI agents.Shared: developer tools, open sourceActive
OpenFoundryW24The fastest developer experience for building on open source AI.Shared: developer tools, open sourceActive
- OpenbaseS20Open-source library discoveryShared: developer tools, open sourceInactive
OpenCodeW21The open source AI coding agentShared: developer tools, open sourceActive
MonosiS20Open Source Data ObservabilityShared: developer tools, open sourceInactive
Also from S25 in AI
Batchmates in Summer 2025.
Cactus ComputeS25Automation Foundation Models For Tiny DevicesActive
MagnitudeS25Open source inference server for local modelsActive
ManufactS25Cloud infrastructure for MCP servers and Claude / ChatGPT plugins.Active
AgentMailS25Email Inboxes for AI AgentsActive
AlterS25Secure access control and authorization platform for agent workflowsActive
AutosanaS25AI agents for E2E testing across mobile & webActive
About stagewise
stagewise is building the open-source agentic IDE: a developer workspace for creating and orchestrating coding agents, previewing running apps, and managing Git workflows. Developers can run agents in parallel, use their preferred models or existing coding subscriptions, and keep agents connected to browser/runtime context as well as the broader codebase, from APIs and tests to docs and deployment paths.
stagewise: questions
Which YC batch was stagewise in?
stagewise was in Y Combinator's Summer 2025 batch (S25).
Is stagewise still active?
Y Combinator lists stagewise as active.
Who founded stagewise?
stagewise's founders, as listed on its YC page: Glenn Töws (Founder/CEO), Julian Goetze (Founder/CTO).
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.