What they do:
AI coding copilot engineered for performance
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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 8 of 13
What they do:
Deploy Machine Learning Models with One Command
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HQ: San Francisco, CA, United States
What they do:
Your self-generating, self-maintaining code knowledge base.
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HQ: San Francisco, CA, United States
What they do:
AI for humans
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HQ: San Francisco, CA, United States
What they do:
Observability and evaluation platform for LLM apps.
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HQ: San Francisco, CA, United States
What they do:
orchestrate your coding agents with sudocode
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HQ: San Francisco, CA, United States
What they do:
The open source Postman alternative.
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HQ: San Francisco, CA, United States
What they do:
the AI coding app for thinking.
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HQ: San Francisco, CA, United States
What they do:
Security for AI-native developers
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HQ: San Francisco, CA, United States
What they do:
AI agents for insurance claims
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HQ: San Francisco, CA, United States
What they do:
AI media creation platform for creators and developers
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HQ: San Francisco, CA, United States
What they do:
Open source AI copilot that knows your company's code and its context
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HQ: San Francisco, CA, United States
What they do:
One living model of your software architecture
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HQ: San Francisco, CA, United States
What they do:
Making everyone a software engineer
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HQ: San Francisco, CA, United States
What they do:
Datadog for robots
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HQ: San Francisco, CA, United States
What they do:
API & SDK for RCS (the next-generation of texting)
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HQ: San Francisco, CA, United States
What they do:
The open source Cursor alternative
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HQ: San Francisco, CA, United States
What they do:
The best DOCX MCP for agents to edit microsoft word documents
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HQ: San Francisco, CA, United States
What they do:
The complete, collaborative workspace for humans and agents
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HQ: Los Angeles, CA, United States
What they do:
The platform for automated hiring and workforce decisions.
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HQ: San Francisco, CA, United States
What they do:
AI documentation engineer – test & autoimprove stale product docs
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HQ: San Francisco, CA, United States
What they do:
AWS for AI Agents
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HQ: San Francisco, CA, United States
What they do:
The fastest native app for agentic engineering.
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HQ: San Francisco, CA, United States
What they do:
Simulation Engine for Benchmarking AI Products
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HQ: San Francisco, CA, United States
What they do:
The data gateway for agents.
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HQ: San Francisco, CA, United States
What they do:
Abundant Intelligence for Everyone
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HQ: San Francisco, CA, United States
What they do:
AI agents for web testing
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HQ: San Francisco, CA, United States
What they do:
AI for quantitative trading
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HQ: San Francisco, CA, United States
What they do:
Self learning computer use agent for developers
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HQ: San Francisco, CA, United States
What they do:
Run open models as fast as your hardware allows
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HQ: San Francisco, CA, United States
What they do:
Turns products into CLIs and agents into customers
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HQ: San Francisco, CA, United States
What they do:
Find what's losing you customers and money in your AI agent and fix it
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HQ: San Francisco, CA, United States
What they do:
The Routing Layer for AI Agents
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HQ: San Francisco, CA, United States
What they do:
AI Agents for Platform Engineering
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HQ: San Francisco, CA, United States
What they do:
Self-tuning search for products and files
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HQ: San Francisco, CA, United States
What they do:
The coding agent that actually collaborates with you
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HQ: San Francisco, CA, United States