What they do:
Persistent sandboxes for agents like hermes, openclaw, claude code
Quick facts:
HQ: New York, NY, United States
YC F26Early stage
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 13 of 17
What they do:
A graph based IDE for when agents program faster than you can read
Quick facts:
HQ: San Francisco, CA, United States
YC F26Early stage
DrChrono
Acquired
What they do:
The essential platform for modern medical practices and patients.
Quick facts:
HQ: San Francisco, CA, United States
CoreOS
Acquired
What they do:
Open source tools of modern distributed systems.
Quick facts:
HQ: San Francisco, CA, United States
GitPrime
Acquired
What they do:
Visibility and analytics for software development leaders.
Quick facts:
HQ: Durango, CO, United States
Quick facts:
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)…
Quick facts:
HQ: New York, NY, United States
Ribbon Health
Acquired
What they do:
Health enterprise API for data on doctors, insurance, costs, & quality
Quick facts:
HQ: New York, NY, United States
Armory
Acquired
What they do:
Continuous Deployment at any scale, for all developers.
Quick facts:
HQ: San Francisco, CA, United States
Memfault
Acquired
What they do:
First IoT reliability platform for debugging, monitoring, OTA updates
Quick facts:
HQ: San Francisco, CA, United States
Bitnami
Acquired
What they do:
The App Store for Server Software
Quick facts:
HQ: San Francisco, CA, United States
Embrace
Acquired
What they do:
Modern user-focused observability built on OpenTelemetry
Quick facts:
HQ: Los Angeles, CA, United States
Pachyderm
Acquired
What they do:
Data Versioning, Data Pipelines, and Data Lineage
Quick facts:
HQ: San Francisco, CA, United States
Compose
Acquired
What they do:
We make it easy to run databases. PostgreSQL, Redis, MongoDB,…
Quick facts:
HQ: San Francisco, CA, United States
Mailgun
Acquired
What they do:
Email API service.
Quick facts:
HQ: San Francisco, CA, United States
Swiftype
Acquired
What they do:
Smart search for the modern team.
Quick facts:
HQ: San Francisco, CA, United States
Citus Data
Acquired
What they do:
Real-time. Big data. PostgreSQL
Quick facts:
HQ: San Francisco, CA, United States
Replicate
Acquired
What they do:
Run machine learning models in the cloud
Quick facts:
HQ: San Francisco, CA, United States
Courier
Acquired
What they do:
The fastest way for developers to build notifications for their app.
Quick facts:
HQ: San Francisco, CA, United States
PlayAI
Acquired
What they do:
Our mission is to make Voice AI accessible and useful to all.
Quick facts:
HQ: San Francisco, CA, United States
Moltin
Acquired
What they do:
eCommerce building blocks through simple APIs for websites & apps.…
Quick facts:
HQ: Boston, MA, United States
Metaplane
Acquired
What they do:
Data observability for modern data teams
Quick facts:
HQ: New York, NY, United States
Fern
Acquired
What they do:
Instantly offer SDKs and API Docs
Quick facts:
HQ: New York, NY, United States
Aptible
Acquired
What they do:
The No Infrastructure Platform as a Service
Quick facts:
HQ: New York, NY, United States
Doppler
Acquired
What they do:
Secure secrets. Prevent breaches. Keep teams moving.
Quick facts:
HQ: Austin, TX, United States
Uiflow
Acquired
What they do:
No-code platform for enterprise software companies
Quick facts:
HQ: San Francisco, CA, United States
Breadcrumbs.io
Acquired
What they do:
No-code scoring engine identifying your most engaged upsell opps
Quick facts:
HQ: San Francisco, CA, United States
Onyx
Acquired
What they do:
Open Source AI Chat
Quick facts:
HQ: San Francisco, CA, United States
Requestly
Acquired
What they do:
Open-Source Postman alternative
Quick facts:
HQ: San Francisco, CA, United States
PopSQL
Acquired
What they do:
SQL editor for teams
Quick facts:
HQ: San Francisco, CA, United States
Bun
Acquired
What they do:
Bun is an incredibly fast all-in-one JavaScript toolkit
Quick facts:
HQ: San Francisco, CA, United States
DeepSource
Acquired
What they do:
Unified DevSecOps platform, helping developers ship good code.
Quick facts:
HQ: San Francisco, CA, United States
Aquarium Learning
Acquired
What they do:
We help ML teams improve their models by improving their datasets
Quick facts:
HQ: San Francisco, CA, United States
Blaxel
Acquired
What they do:
The infrastructure for autonomous agents
Quick facts:
HQ: San Francisco, CA, United States
Zencoder
Acquired
What they do:
Video Encoding API, Open source video player (video.js)
Quick facts:
HQ: San Francisco, CA, United States
RethinkDB
Acquired
What they do:
The open source database for the realtime web.
Quick facts:
HQ: San Francisco, CA, United States