Onlook
Hiring
What they do:
The Developer tool for Designers
Quick facts:
HQ: San Francisco, CA, United States
Developer Tools Startups Hiring Now
This list has 187 startups and was last updated on Oct 15, 2026. Biggest hubs: San Francisco (129), New York (17), and London (9). Largest teams: Algolia, Checkr, and Amplitude. Latest round: Momentic raised $18.6M (Jan 27, 2026).
187 startupsPage 5 of 6
Freebuff
Hiring
What they do:
The free coding agent
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HQ: San Francisco, CA, United States
Infinite
Hiring
What they do:
Global B2B Stablecoin Processor
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HQ: San Francisco, CA, United States
TraceRoot.AI
Hiring
What they do:
Open Source AI Agent Improvement Platform
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HQ: San Francisco, CA, United States
Floot
Hiring
What they do:
The app platform inside Claude and ChatGPT.
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HQ: San Francisco, CA, United States
Superset
Hiring
What they do:
Building self-improving software
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HQ: San Francisco, CA, United States
Simantic
Hiring
What they do:
Firmware simulation for AI agents
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Smartcuts
Hiring
What they do:
Chrome extension to turn clicks & keystrokes into no-code automations
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HQ: New York, NY, United States
MSPilot
Hiring
What they do:
Turn AI adoption into a recurring revenue line.
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HQ: San Francisco, CA, United States
Poly
Hiring
What they do:
Intelligent Personal Cloud Storage
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HQ: San Francisco, CA, United States
Firecrawl
Hiring
What they do:
Building the library for superintelligence.
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HQ: San Francisco, CA, United States
Morph
Hiring
What they do:
Fast Models Optimized for Coding Agents
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HQ: Columbus, OH, United States
cmux
Hiring
What they do:
Open source applied AI lab building next-gen devtools
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HQ: San Francisco, CA, United States
Kilvin
Hiring
What they do:
Custom software for your business
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HQ: New York, NY, United States
a0.dev
Hiring
What they do:
We make mobile apps using AI.
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HQ: San Francisco, CA, United States
Cua
Hiring
What they do:
Give every agent a cloud desktop
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HQ: San Francisco, CA, United States
Attune
Hiring
What they do:
Faster builds, zero effort.
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HQ: San Francisco, CA, United States
Klavis AI
Hiring
What they do:
High Quality Coding & Agentic Data for AI labs
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Pangolin
Hiring
What they do:
Open networking and security for your workforce, AI agents, and infra
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HQ: New York, NY, United States
Nozomio
Hiring
What they do:
product lab. focused on personal ai and context.
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HQ: San Francisco, CA, United States
Scott AI
Hiring
What they do:
The planning layer for teams that build with coding agents
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HQ: New York, NY, United States
Sourcebot
Hiring
What they do:
Helping humans and AI agents understand massive codebases
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HQ: San Francisco, CA, United States
Rulebricks
Hiring
What they do:
Add powerful decision-making capabilities to any automated workflow.
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HQ: San Francisco, CA, United States
Ellipsis
Hiring
What they do:
Cloud platform for coding agents
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HQ: New York, NY, United States
Cerulion
Hiring
What they do:
Open source operating system for robots
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HQ: San Francisco, CA, United States
HumanLayer
Hiring
What they do:
The multiplayer control plane for your software factory
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HQ: San Francisco, CA, United States
nao Labs
Hiring
What they do:
Open Source Analytics Agent
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Humwork
Hiring
What they do:
Human experts as API for AI Agents
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HQ: San Francisco, CA, United States
Unsiloed AI
Hiring
What they do:
API for parsing multimodal unstructured data
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HQ: San Francisco, CA, United States
Lemma
Hiring
What they do:
Production Monitoring for AI agents
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HQ: San Francisco, CA, United States
Waddle Labs
Hiring
What they do:
LLMs that control robots
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HQ: San Francisco, CA, United States
Salus
Hiring
What they do:
Guardrails to validate your agent's actions before they execute
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HQ: San Francisco, CA, United States
Replicas
Hiring
What they do:
Run any coding agent harness in the cloud
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HQ: San Francisco, CA, United States
Reason Machines
Hiring
What they do:
Reason Machines builds Reason Agent, the autonomous software engineer…
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HQ: San Francisco, CA, United States
Workers IO
Hiring
What they do:
Simulation Environments for Verifying Mission Critical Software
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HQ: San Francisco, CA, United States
Blink
Hiring
What they do:
Build fully functional apps with AI.
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HQ: San Francisco, CA, United States