What they do:
High performance coding 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 10 of 13
What they do:
The AI gateway for cheaper, faster, permissioned agents.
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HQ: San Francisco, CA, United States
What they do:
AWS for Agents
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HQ: San Francisco, CA, United States
What they do:
On-device Knowledge Graph engine for Enterprise Software
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HQ: San Francisco, CA, United States
What they do:
Managed Agents API
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HQ: San Francisco, CA, United States
What they do:
Combining open-source AI models for better answers at lower cost
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HQ: San Francisco, CA, United States
What they do:
Android for drones
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HQ: San Francisco, CA, United States
What they do:
Get up and running with large language models.
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HQ: San Francisco, CA, United States
YC W21Growth stage
What they do:
Online University for Tech Professionals
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HQ: San Francisco, CA, United States
What they do:
Remote Shell Access in the Browser
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HQ: San Francisco, CA, United States
YC W23Early stage
What they do:
Generate ads. Iterate till perfect.
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HQ: San Francisco, CA, United States
YC W24Early stage
What they do:
Random labs is building long running autonomous coding agents.
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HQ: San Francisco, CA, United States
YC S24Early stage
What they do:
Reimagining how Machines Learn
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HQ: San Francisco, CA, United States
YC W25Early stage
What they do:
Accelerating world models.
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HQ: San Francisco, CA, United States
YC X25Early stage
What they do:
Engineering Intelligence and Token Optimization for the AI-Coding Era
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HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
Autonomous Hardware Testing
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HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
AI teammates for your business-critical work.
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HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
A graph based IDE for when agents program faster than you can read
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HQ: San Francisco, CA, United States
YC F26Early stage
DrChrono
Acquired
What they do:
The essential platform for modern medical practices and patients.
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HQ: San Francisco, CA, United States
CoreOS
Acquired
What they do:
Open source tools of modern distributed systems.
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HQ: San Francisco, CA, United States
Armory
Acquired
What they do:
Continuous Deployment at any scale, for all developers.
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HQ: San Francisco, CA, United States
Memfault
Acquired
What they do:
First IoT reliability platform for debugging, monitoring, OTA updates
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HQ: San Francisco, CA, United States
Bitnami
Acquired
What they do:
The App Store for Server Software
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HQ: San Francisco, CA, United States
Embrace
Acquired
What they do:
Modern user-focused observability built on OpenTelemetry
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HQ: Los Angeles, CA, United States
Pachyderm
Acquired
What they do:
Data Versioning, Data Pipelines, and Data Lineage
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HQ: San Francisco, CA, United States
Compose
Acquired
What they do:
We make it easy to run databases. PostgreSQL, Redis, MongoDB,…
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HQ: San Francisco, CA, United States
Mailgun
Acquired
What they do:
Email API service.
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HQ: San Francisco, CA, United States
Swiftype
Acquired
What they do:
Smart search for the modern team.
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HQ: San Francisco, CA, United States
Citus Data
Acquired
What they do:
Real-time. Big data. PostgreSQL
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HQ: San Francisco, CA, United States
Replicate
Acquired
What they do:
Run machine learning models in the cloud
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HQ: San Francisco, CA, United States
Courier
Acquired
What they do:
The fastest way for developers to build notifications for their app.
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HQ: San Francisco, CA, United States
PlayAI
Acquired
What they do:
Our mission is to make Voice AI accessible and useful to all.
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HQ: San Francisco, CA, United States
Uiflow
Acquired
What they do:
No-code platform for enterprise software companies
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HQ: San Francisco, CA, United States
Breadcrumbs.io
Acquired
What they do:
No-code scoring engine identifying your most engaged upsell opps
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HQ: San Francisco, CA, United States
Onyx
Acquired
What they do:
Open Source AI Chat
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HQ: San Francisco, CA, United States
Requestly
Acquired
What they do:
Open-Source Postman alternative
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HQ: San Francisco, CA, United States