Magnitude
Open source inference server for local models
Founders
- Tom GreenwaldFounder/CEO
- Anders LieFounder/CTO
Same space
Competitors
Closest in what they build, same category.
RunAnywhereW26Fastest inference anywhere: open models on-prem, hosted or on-deviceShared: developer tools, open source, infrastructureActive
ManufactS25Cloud infrastructure for MCP servers and Claude / ChatGPT plugins.Shared: developer tools, open source, infrastructureActive
OpenFoundryW24The fastest developer experience for building on open source AI.Shared: developer tools, open source, infrastructureActive
CuaX25Give every agent a cloud desktopShared: open sourceActive
CodevisorW25The fastest native app for agentic engineering.Shared: developer tools, open sourceActive
Adjacent
Overlapping tags, a different niche.
Unsloth AIS24Open-Source Reinforcement Learning (RL) & Fine-tuning for LLMs.Shared: developer tools, open source, infrastructureActive
HyperDXS22Open-source, dev-friendly observability.Shared: developer tools, open source, infrastructureAcquired
SublingualW25Daily productivity trackerShared: developer tools, open source, infrastructureInactive
HelixDBX25The fastest & most scalable graph-vector database on the marketShared: developer tools, open source, infrastructureActive
BotCityW22Observability and Governance for AI-Generated Python scripts.Shared: developer tools, open source, infrastructureActive
Also from S25 in AI
Batchmates in Summer 2025.
Cactus ComputeS25Automation Foundation Models For Tiny DevicesActive
KERNELS25Crazy fast, open source infra for AI agents to use the InternetActive
stagewiseS25The Open Source Agentic IDEActive
TraceRoot.AIS25Open source self-improving layer for AI agentsActive
AgentMailS25Email Inboxes for AI AgentsActive
AlterS25Secure access control and authorization platform for agent workflowsActive
Outside YC
Similar companies on companies.fru.dev.
About Magnitude
Magnitude runs the best local models for your hardware, plugged into the agent you already use. Works with Pi, OpenCode, Hermes, OpenClaw, Codex, Claude Code, Oh My Pi, and Cline.
San Francisco, CA, USA
Magnitude: questions
Which YC batch was Magnitude in?
Magnitude was in Y Combinator's Summer 2025 batch (S25).
Is Magnitude still active?
Y Combinator lists Magnitude as active.
Who founded Magnitude?
Magnitude's founders, as listed on its YC page: Tom Greenwald (Founder/CEO), Anders Lie (Founder/CTO).
Where is Magnitude based?
Magnitude 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.