What they do:
The Open-Source Alternative to Claude Managed Agents
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HQ: San Francisco, CA, United States
Top Developer Tools Startups in California
This list has 465 startups and was last updated on Oct 15, 2026. 133 of them are hiring right now. Biggest hubs: San Francisco (441) and Los Angeles (20). Largest teams: GitLab, PagerDuty, and Algolia. Latest round: Supabase raised $150M (Oct 2, 2026).
465 startupsPage 7 of 13
What they do:
Build an API to interact with any website.
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HQ: San Francisco, CA, United States
What they do:
The cheapest, fastest inference cloud
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HQ: San Francisco, CA, United States
What they do:
/dev/fast is the AI-native code forge
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HQ: San Francisco, CA, United States
What they do:
OpenRouter for Voice AI: one API, every call on the best speech model
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HQ: San Francisco, CA, United States
What they do:
Least cost routing system to reduce 70%+ token spend
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HQ: San Francisco, CA, United States
What they do:
Making the JVM faster
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HQ: San Francisco, CA, United States
What they do:
Easiest way to set up Zero Trust Access for your team
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HQ: San Francisco, CA, United States
What they do:
Deploy serverless without rewriting code
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HQ: San Francisco, CA, United States
What they do:
Infrastructure for managing GPU clusters for training/serving.
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HQ: San Francisco, CA, United States
What they do:
Infuse knowledge into language models with just 10 samples
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HQ: San Francisco, CA, United States
What they do:
Config Management for Robotics
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HQ: San Francisco, CA, United States
What they do:
The COLD Task Framework
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HQ: San Francisco, CA, United States
What they do:
Lossless web data.
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HQ: San Francisco, CA, United States
What they do:
A Reliable AI Frontend Engineer
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HQ: San Francisco, CA, United States
What they do:
The Lovable & Replit killers
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HQ: San Francisco, CA, United States
What they do:
Struct keeps prod running
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HQ: San Francisco, CA, United States
What they do:
AI powered debugging notebooks for incident response
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HQ: San Francisco, CA, United States
What they do:
Open Source React.js Library for AI Chat
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HQ: San Francisco, CA, United States
What they do:
Custom models trained on your data
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HQ: San Francisco, CA, United States
What they do:
Understand your users beyond the numbers
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HQ: San Francisco, CA, United States
What they do:
Self-Driving CI: fast AI-native GitHub Actions runners
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HQ: San Francisco, CA, United States
What they do:
AI content manager that grows your company's online presence
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HQ: San Francisco, CA, United States
What they do:
Production infrastructure on autopilot
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HQ: San Francisco, CA, United States
What they do:
Team chat to command all your company's coding agents
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HQ: San Francisco, CA, United States
What they do:
AI production engineer for regulated industries
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HQ: San Francisco, CA, United States
What they do:
Reliable and safe data engineering and data science agents
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HQ: San Francisco, CA, United States
What they do:
The identity and communication layer for AI agents
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HQ: San Francisco, CA, United States
What they do:
We find flaws in RL environments and evals and help you fix them.
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HQ: San Francisco, CA, United States
What they do:
Autoresearch as a service: we solve your hardest measurable problems
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HQ: San Francisco, CA, United States
What they do:
Evals for robots
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HQ: San Francisco, CA, United States
What they do:
The managed cloud for AI agents.
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HQ: San Francisco, CA, United States
What they do:
Simple third-party app patching and deployment for Windows.
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HQ: San Francisco, CA, United States
What they do:
Easy button to use data for your daily operations
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HQ: San Francisco, CA, United States
What they do:
AI Search for the Next Generation
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HQ: San Francisco, CA, United States
What they do:
The best AI chat you've ever used
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HQ: San Francisco, CA, United States