Rutter
Hiring
What they do:
The Unified API for Business Financial Data
Quick facts:
HQ: New York, NY, 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 3 of 17
SnapMagic
Hiring
What they do:
AI-assisted electronics design
Quick facts:
HQ: San Francisco, CA, United States
What they do:
Platform that allows anyone to create and monetize video games.
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HQ: San Francisco, CA, United States
Respan
Hiring
What they do:
Self-driving observability, evals, and gateway for AI agents
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HQ: San Francisco, CA, United States
What they do:
Environments as a service
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HQ: Los Angeles, CA, United States
Castle
Hiring
What they do:
Block bots & bad behavior
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HQ: San Francisco, CA, United States
Handoff
Hiring
What they do:
AI estimator & agent for remodelers.
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HQ: Austin, TX, United States
What they do:
Subscription infrastructure & paywall experimentation for mobile apps
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HQ: New York, NY, United States
Serif Health
Hiring
What they do:
Healthcare Price Transparency APIs and Data Products
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HQ: Los Angeles, CA, United States
Replo
Hiring
What they do:
Sell anything
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HQ: San Francisco, CA, United States
What they do:
We make Orca, MIT open source terminal-based agent orchestrator
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HQ: San Francisco, CA, United States
Medplum
Hiring
What they do:
API first electronic health record (EHR) that is open source
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HQ: San Francisco, CA, United States
Axle
Hiring
What they do:
AI-native clearinghouse for insurance
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HQ: New York, NY, United States
What they do:
Production-ready document processing
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HQ: New York, NY, United States
LiteLLM
Hiring
What they do:
Call every LLM API like it's OpenAI [100+ LLMs]
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HQ: San Francisco, CA, United States
Artie
Hiring
What they do:
Software that streams data from databases to warehouses in real-time
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HQ: San Francisco, CA, United States
What they do:
Frontier coding data for training and evaluating LLMs
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HQ: San Francisco, CA, United States
What they do:
The fastest way to ship airtight AI
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HQ: San Francisco, CA, United States
Porter
Hiring
What they do:
Easiest way to deploy on AWS/GCP/Azure
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HQ: New York, NY, United States
Inkeep
Hiring
What they do:
Build AI Agent teammates and automations in code or no-code
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HQ: San Francisco, CA, United States
What they do:
Develop your CI/CD pipelines as code and run them anywhere
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HQ: San Francisco, CA, United States
What they do:
Crazy fast, open source infra for AI agents to use the Internet
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HQ: San Francisco, CA, United States
Oway
Hiring
What they do:
Building the open operating system for the automated physical economy.
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HQ: San Francisco, CA, United States
Revyl
Hiring
What they do:
The Mobile Development Platform
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HQ: San Francisco, CA, United States
Activeloop
Hiring
What they do:
Database for AI
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HQ: San Francisco, CA, United States
BuildBuddy
Hiring
What they do:
BuildBuddy provides enterprise features for Bazel — the open source…
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HQ: San Francisco, CA, United States
Velt
Hiring
What they do:
SDK for adding an agent and human governance layer to your product
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HQ: San Francisco, CA, United States
Omnistrate
Hiring
What they do:
Build your control plane to deploy your product in your customer VPC…
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HQ: San Francisco, CA, United States
Spur
Hiring
What they do:
Spur is the validation infrastructure enterprises use to ship at the…
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HQ: New York, NY, United States
Wordware
Hiring
What they do:
AI agents you can rely on
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HQ: San Francisco, CA, United States
Cekura
Hiring
What they do:
Voice AI and Chat AI agents: Testing and Observability
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HQ: San Francisco, CA, United States
What they do:
Pull Requests as a Service
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HQ: San Francisco, CA, United States
Ditto
Hiring
What they do:
Manage the words across your team’s product from design to production.
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HQ: San Francisco, CA, United States
What they do:
Icons and social logos for your website.
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HQ: Bentonville, AR, United States
Svix
Hiring
What they do:
Enterprise ready webhooks service, open-source and in the cloud
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HQ: San Francisco, CA, United States
Unsloth AI
Hiring
What they do:
Open-Source Reinforcement Learning (RL) & Fine-tuning for LLMs.
Quick facts:
HQ: San Francisco, CA, United States