What they do:
Hardware-Aware AI for Embedded Software
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HQ: San Francisco, CA, United States
Top Developer Tools Startups in San Francisco
This list has 441 startups and was last updated on Oct 15, 2026. 129 of them are hiring right now. Largest teams: GitLab, PagerDuty, and Algolia. Latest round: Supabase raised $150M (Oct 2, 2026).
441 startupsPage 6 of 13
What they do:
Collaborative AI app builder for teams
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HQ: San Francisco, CA, United States
What they do:
The agent-native serverless cloud
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HQ: San Francisco, CA, United States
What they do:
We give AI agents realtime web context via API
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HQ: San Francisco, CA, United States
What they do:
Cosmic is an AI-powered headless CMS
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HQ: San Francisco, CA, United States
Deepnote
Hiring
What they do:
A better data science notebook.
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HQ: San Francisco, CA, United States
What they do:
Open source agent generation framework
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HQ: San Francisco, CA, United States
Automat
Hiring
What they do:
Agentic automation that understands context, recovers, and improves.
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HQ: San Francisco, CA, United States
YC W23Growth stage
What they do:
Helps teams work effectively with AI coding agents.
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HQ: San Francisco, CA, United States
What they do:
Generate fast, reliable APIs for any platform
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HQ: San Francisco, CA, United States
Emergent
Hiring
What they do:
AI app builder that turns your ideas into monetizable software.
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HQ: San Francisco, CA, United States
YC S24Growth stage
What they do:
The most powerful sandboxes for AI Agents
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HQ: San Francisco, CA, United States
What they do:
AI app builder for creating and launching iPhone apps
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HQ: San Francisco, CA, United States
What they do:
Encrypted AI with verifiable privacy
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HQ: San Francisco, CA, United States
What they do:
Turn scattered data into one platform for decision-making
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HQ: San Francisco, CA, United States
What they do:
The E2E testing layer for AI-driven development
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HQ: San Francisco, CA, United States
Proliferate
Hiring
What they do:
Do your life's work with agents
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HQ: San Francisco, CA, United States
YC S25Early stage
What they do:
AI agents for E2E testing across mobile & web
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HQ: San Francisco, CA, United States
What they do:
Browser infra for AI agents: sessions, auth, proxies, payments
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HQ: San Francisco, CA, United States
What they do:
API for unlimited, durable, real-time streams
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HQ: San Francisco, CA, United States
What they do:
Earned intelligence for every company
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HQ: San Francisco, CA, United States
What they do:
QA agents that write tests 10x faster with zero maintenance
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HQ: San Francisco, CA, United States
What they do:
The authentication framework for TypeScript
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HQ: San Francisco, CA, United States
What they do:
The Open-Source Alternative to Claude Managed Agents
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HQ: San Francisco, CA, United States
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