What they do:
Turning messy inboxes into ERP-Ready Data
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HQ: San Francisco, CA, United States
Top Developer Tools Startups
This list has 794 startups and was last updated on Oct 15, 2026. 187 of them are hiring right now. Biggest hubs: San Francisco (441), New York (75), and London (39). Largest teams: GitLab, PagerDuty, and Algolia. Latest round: Coding Giants raised €6M (Oct 14, 2026).
Survival statistics →886 open roles →
794 startupsPage 16 of 23
What they do:
Verify AI-generated code before you ship it
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HQ: San Francisco, CA, United States
What they do:
Agentic AI Security and Governance
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HQ: San Francisco, CA, United States
What they do:
Managed GPU-accelerated Spark + SQL at 2x speed and half the cost
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HQ: New York, NY, United States
What they do:
ChatGPT's memory feature in an open, portable format
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HQ: San Francisco, CA, United States
What they do:
The browser for agentic development
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HQ: San Francisco, CA, United States
What they do:
The Git forge for the next hundred billion commits
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HQ: San Francisco, CA, United States
What they do:
High performance coding agents
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HQ: San Francisco, CA, United States
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:
building the open agent runtime
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HQ: Ankara, Turkey
What they do:
Android for drones
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HQ: San Francisco, CA, United States
What they do:
Caveman cuts what AI agents cost without making them dumber.
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HQ: Amsterdam, Netherlands
What they do:
Insurance Billing APIs for Healthcare Businesses
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HQ: New York, NY, United States
YC S12Growth stage
What they do:
The email API built for product teams
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HQ: 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:
Open-source agentic security automation platform
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HQ: New York, NY, United States
YC W24Early 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:
Persistent sandboxes for agents like hermes, openclaw, claude code
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HQ: New York, NY, United States
YC F26Early 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
GitPrime
Acquired
What they do:
Visibility and analytics for software development leaders.
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HQ: Durango, CO, United States
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HQ: New York, NY, United States
YC W23Early stage
Fullstack Academy
Acquired
What they do:
Pioneer in immersive code education. Acquired by Zovio (NASDAQ: ZVO)…
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HQ: New York, NY, United States