All Industries

Top Open Source Companies

190 Open Source companies, sorted by total funding raised.

Private 5G Made Simple

Firecell builds open-source private 5G networks so enterprises of any size can deploy secure cell...

11–50Open Source, Telecommunications
Venture RoundTotal funding$16.9MFeb 2026
QuestDB

High-performance time series database

London, United Kingdom11–50Developer Tools, Analytics
Series ATotal funding$16.3MNov 2021
Firecrawl

API that searches, scrapes, and interacts with the web, turning live internet content into struct...

San Francisco, United States1–10Artificial Intelligence, Developer Tools
Series ATotal funding$16.2MAug 2025
Activeloop

Activeloop replaces complex data infrastructure with a Database for AI that indexes, searches, an...

Mountain View, United States11–50Artificial Intelligence, Developer Tools
Series ATotal funding$16.0MMar 2024
authzed

Builds the tools companies need for performant, scalable application authorization, including Spi...

New York, United States11–50Cybersecurity, Data & Analytics
Series ATotal funding$15.9MJun 2024
Artie

Real-time data replication platform, built by a lean San Francisco team, that moves hundreds of b...

San Francisco, United States1–10Data & Analytics, Developer Tools
Series ATotal funding$15.3MJan 2025
BotCity

BotCity gives organizations visibility and control over enterprise Python scripts created by busi...

San Francisco, United States11–50Artificial Intelligence, Automation
Series ATotal funding$15.0MSep 2025
FernAcquired

Fern generates documentation websites, idiomatic SDKs, and an agent-first CLI from an API spec fo...

New York, United States11–50Developer Tools, Open Source
Series ATotal funding$13.0MApr 2025
Svix

Svix is the webhooks-as-a-service platform that enables companies of all sizes to send webhooks e...

New York, United States11–50Developer Tools, Open Source
Series ATotal funding$13.0MFeb 2023
Onyx

Onyx is building the open source application layer for all LLMs, empowering teams to adopt genera...

San Francisco, United States1–10Natural Language Processing, Open Source
SeedTotal funding$10.0MMar 2025
Citus DataAcquired

Open source PostgreSQL extension that embraces the relational database while extending it to be h...

San Francisco, United States11–50Data & Analytics, Databases
Series ATotal funding$9.5MOct 2015
RethinkDBAcquired

The open source database for the realtime web.

United States11–50Open Source
Series ATotal funding$9.2MDec 2013
Elementary

Elementary unifies observability, quality, governance, and discovery under one control plane for ...

Tel Aviv-Yafo, Israel11–50Analytics, Data & Analytics
SeedTotal funding$8.5MJan 2021
highlight.ioAcquired

The open source, fullstack monitoring platform: stop guessing why…

Seattle, United States1–10Developer Tools, Open Source
SeedTotal funding$8.0M
Mentra

Mentra builds open-source smart-glasses hardware, an operating system, developer tools, and deplo...

San Francisco, United States1–10AR/VR, Artificial Intelligence
SeedTotal funding$8.0MJul 2025
SigNoz

Open-source observability tool powered by OpenTelemetry that monitors applications and infrastruc...

San Francisco, United States11–50Developer Tools, Open Source
Series ATotal funding$7.6MSep 2023
bloop

bloop makes Vibe Kanban, tools that enable engineers to plan, orchestrate and review the work of ...

London, United Kingdom1–10Artificial Intelligence, Open Source
SeedTotal funding$7.4MDec 2021
Scarf

Privacy-conscious, cookie-free usage analytics for open-source projects, providing sales and mark...

Oakland, United States11–50Developer Tools, Open Source
Series ATotal funding$7.3MDec 2021
LanternClosed

Lantern Cloud is an open-source Postgres vector database and toolkit that helps developers build ...

San Francisco, United States1–10Artificial Intelligence, Databases
Venture RoundTotal funding$6.8MJan 2024
OpenPipeAcquired

Turn expensive prompts into cheap fine-tuned models

Seattle, United States1–10AI Operations, Artificial Intelligence
SeedTotal funding$6.7MMar 2024
DBeaver

DBeaver is an open source SQL client IDE and database tool.

New York, United States51–200Databases, Developer Tools
SeedTotal funding$6.0MApr 2023
Shuttle

Build & ship a backend without writing any infrastructure files. Instead get your infrastructure ...

London, United Kingdom11–50Developer Tools, Open Source
SeedTotal funding$6.0MOct 2025
CodeStreamAcquired

CodeStream is a Developer Collaboration Platform designed to…

New York, United States1–10Developer Tools, Open Source
Venture RoundTotal funding$5.6MAug 2019
HeliconeAcquired

LLM Observability for Developers

San Francisco, United States1–10AI Operations, Analytics
SeedTotal funding$5.5MSep 2024
Wasp

Open-source full-stack TypeScript framework connecting React, Node.js, Prisma, authentication, jo...

Zagreb, Croatia1–10Developer Tools, Open Source
SeedTotal funding$5.2MApr 2025