What they do:
Incredibly reliable background task queues and cron jobs
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HQ: Austin, TX, United States
Top Developer Tools Startups in the United States
This list has 603 startups and was last updated on Oct 15, 2026. 157 of them are hiring right now. Biggest hubs: San Francisco (441), New York (75), and Los Angeles (20). Largest teams: GitLab, PagerDuty, and Algolia. Latest round: Supabase raised $150M (Oct 2, 2026).
603 startupsPage 12 of 17
What they do:
Faster processors for solving NP-complete problems
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HQ: San Diego, CA, United States
What they do:
AI Agent for Billpay platforms to pay invoices with virtual cards
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HQ: San Francisco, CA, United States
What they do:
Create, edit, and share procedural material graphs.
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HQ: Pittsburgh, PA, United States
What they do:
Transform Document Workflows with AI Agents
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HQ: San Francisco, CA, United States
What they do:
The simplest way to extract web data at scale
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HQ: San Francisco, CA, United States
What they do:
Specialized agents for real work
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HQ: Los Angeles, CA, United States
What they do:
Gives non-technical team members agents that work right out of the box
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HQ: New York, NY, United States
What they do:
Make your LLMs 3x faster.
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HQ: San Francisco, CA, United States
What they do:
Turning messy inboxes into ERP-Ready Data
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HQ: San Francisco, CA, United States
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:
Android for drones
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HQ: San Francisco, CA, United States
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