Pyroscope
Acquired
What they do:
Open source continuous profiling software to debug performance issues
Quick facts:
HQ: San Francisco, CA, United States
Top Open Source Startups
This list has 177 startups and was last updated on Oct 15, 2026. 42 of them are hiring right now. Biggest hubs: San Francisco (96), New York (15), and London (10). Largest teams: GitLab, InfluxData, and Docker. Latest round: Supabase raised $150M (Oct 2, 2026).
177 startupsPage 5 of 5
Helicone
Acquired
What they do:
LLM Observability for Developers
Quick facts:
HQ: San Francisco, CA, United States
Keep
Acquired
What they do:
The open-source AIOps platform
Quick facts:
FlowiseAI
Acquired
What they do:
Open source GenAI development platform
Quick facts:
HQ: Remote
Jitsu
Acquired
What they do:
Open-Source CDP (acquired by Helium Ventures)
Quick facts:
HQ: New York, NY, United States
HyperDX
Acquired
What they do:
Open-source, dev-friendly observability.
Quick facts:
HQ: San Francisco, CA, United States
OpenInt
Acquired
What they do:
Open Source Embedded Product Integrations
Quick facts:
HQ: Remote
Laudspeaker
Acquired
What they do:
Open source mobile marketing platform. Alternative to appcues /…
Quick facts:
HQ: San Francisco, CA, United States
Warrant
Acquired
What they do:
Authorization and access control as a service.
Quick facts:
HQ: Los Angeles, CA, United States
Payload
Acquired
What they do:
Developer-First Headless CMS and Application Framework
Quick facts:
HQ: Grand Rapids, MI, United States
Vocode
Acquired
What they do:
Open source Voice AI
Quick facts:
HQ: San Francisco, CA, United States
PipelineDB
Acquired
What they do:
Open-source time-series data analytics extension for PostgreSQL
Quick facts:
HQ: Los Angeles, CA, United States
KeyDB
Acquired
What they do:
The only database you'll ever need
Quick facts:
Arroyo
Acquired
What they do:
Cloud-native stream processing
Quick facts:
HQ: San Francisco, CA, United States
DAGWorks Inc.
Acquired
What they do:
Open source tools & services for reliable AI Agents & AI Applications
Quick facts:
HQ: San Francisco, CA, United States
PeerDB
Acquired
What they do:
Fast, native ETL for Postgres 🐘 🚀
Quick facts:
OpenPipe
Acquired
What they do:
Turn expensive prompts into cheap fine-tuned models
Quick facts:
HQ: Seattle, WA, United States
Shuttle
Shut down
What they do:
Build Backends. Fast.
Quick facts:
HQ: London, United Kingdom
Standard Cyborg
Shut down
What they do:
Buid, test and deploy perception applications
Quick facts:
HQ: San Francisco, CA, United States
Tipe
Shut down
What they do:
Open-source, customizable, headless CMS
Quick facts:
HQ: San Francisco, CA, United States
Tesseral
Shut down
What they do:
The open source platform for managing identity in business software
Quick facts:
HQ: San Francisco, CA, United States
LunaSec
Shut down
What they do:
An Open Source dependency security tool that is smarter than the rest
Quick facts:
HQ: Seattle, WA, United States
Tusk
Shut down
What they do:
AI agent that generates unit and integration tests
Quick facts:
HQ: San Francisco, CA, United States
Grai
Shut down
What they do:
Open source version control for metadata
Quick facts:
HQ: San Francisco, CA, United States
Lantern
Shut down
What they do:
Postgres vector database extension to build AI applications
Quick facts:
HQ: San Francisco, CA, United States
Tensil
Shut down
What they do:
We turn machine learning models into custom hardware.
Quick facts:
HQ: San Francisco, CA, United States
Monosi
Shut down
What they do:
Open Source Data Observability
Quick facts:
HQ: San Francisco, CA, United States
Lunatic
Shut down
What they do:
Operating System for server-side apps
Quick facts:
HQ: Vienna, Austria
Dittofeed
Shut down
What they do:
Open-source customer engagement & messaging automation
Quick facts:
HQ: Los Angeles, CA, United States
Lotus
Shut down
What they do:
Open-Core Pricing and Billing Engine
Quick facts:
HQ: New York, NY, United States
moonrepo
Shut down
What they do:
Open source build tool for monorepos and large codebases
Quick facts:
HQ: Portland, OR, United States
Sublingual
Shut down
What they do:
Daily productivity tracker
Quick facts:
HQ: San Francisco, CA, United States
Openbase
Shut down
What they do:
Open-source library discovery
Quick facts:
HQ: San Francisco, CA, United States