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Seed Open Source Companies

Explore 127 open source startups that raised seed funding. Access verified founder contact information and fundraising data.

Total Companies
127
Total Funding
$132.8M
Avg Funding
$5.3M
Cities
13

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San Francisco, United States
$7.1M
raised

Alien is a project building a decentralized “proof of humanity” and identity network designed for the age of AI, with blockchain and token.

Apr 2026
Pre-Seed

Founder Contacts

30,000+ verified contacts

San Francisco, United States
$2.4M
raised

The leading community for developers to discover, compare and choose open-source technologies.

Apr 2022
Seed

Founder Contacts

30,000+ verified contacts

Wilmington, United States
$2.8M
raised

FerretDB is an open source MongoDB-compatible database

Mar 2022
Seed

Founder Contacts

30,000+ verified contacts

New York, United States
$8.0M
raised

SkipLabs builds infrastructure for reactive applications.

Mar 2025
Seed

Founder Contacts

30,000+ verified contacts

Commerce City, United States
$250K
raised

Sol PBC is a public benefits company that offers open-source tools and services for individuals to gain insight from their personal data.

Mar 2026
Seed

Founder Contacts

30,000+ verified contacts

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30,000+ verified emails
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San Francisco, United States
$1.6M
raised

Activepieces is an open source business automation software that allows users to automate their work without writing code.

Mar 2023
Seed

Founder Contacts

30,000+ verified contacts

Wilmington, United States

Convoy is an online gateway that sends, receives, and manages webhooks events.

Mar 2022
Pre-Seed

Founder Contacts

30,000+ verified contacts

San Francisco, United States
$500K
raised

camelAI is a self-hosted secure platform for vibe coding real software.

Feb 2024
Pre-Seed

Founder Contacts

30,000+ verified contacts

London, United Kingdom
$3.0M
raised

Mizar is a crypto trading company that provides information management solutions to serve the Oracle user community.

Feb 2022
Seed

Founder Contacts

30,000+ verified contacts

Wilmington, United States
$2.9M
raised

Tonbo IO offers an open-source, embedded database library for serverless, data-intensive applications.

Feb 2026
Seed

Founder Contacts

30,000+ verified contacts

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30,000+ verified emails
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Berlin, Germany
$7.5M
raised

Semantic memory for AI apps and Agents

Feb 2026
Seed

Founder Contacts

30,000+ verified contacts

San Francisco, United States
$120K
raised

Watermelon offers an open-source copilot for code review

Feb 2023
Pre-Seed

Founder Contacts

30,000+ verified contacts

San Francisco, United States
$6.3M
raised

Manufact provides open-source developer tools and infrastructure for the model context protocol.

Feb 2026
Seed

Founder Contacts

30,000+ verified contacts

Miami, United States
$2.2M
raised

AI + Open Source OS for MSPs

Oct 2025
Pre-Seed

Founder Contacts

30,000+ verified contacts

San Francisco, United States
$4.2M
raised

SubImage provides cloud mapping for security teams, offering visibility and risk reduction through Cartography's open-source tech.

Oct 2025
Seed

Founder Contacts

30,000+ verified contacts

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30,000+ verified emails
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Paris, France
$15.2M
raised

Probabl is a provider of open-source data science and machine learning solutions and services.

Oct 2025
Seed

Founder Contacts

30,000+ verified contacts

Warrington, United Kingdom
$3.0M
raised

Supermemory is an open-source AI platform that enables users to organize, search, and understand all the saved content on the internet.

Oct 2025
Pre-Seed

Founder Contacts

30,000+ verified contacts

San Francisco, United States
$4.7M
raised

Pangolin provides an open-source gateway for secure access to internal applications with user-based permissions.

Oct 2025
Seed

Founder Contacts

30,000+ verified contacts

Cupertino, United States
$35.0M
raised

Obot AI is developing an open-source Enterprise MCP Gateway to facilitate the rapid adoption of AI

Sep 2025
Seed

Founder Contacts

30,000+ verified contacts

San Francisco, United States
$500K
raised

MCP Use provides open-source developer tools and infrastructure for the model context protocol.

Sep 2025
Pre-Seed

Founder Contacts

30,000+ verified contacts

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30,000+ verified emails
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Montréal, Canada
$2.5M
raised

Uno Platform powers building cross-platform .NET applications in record time

Aug 2025
Seed

Founder Contacts

30,000+ verified contacts

Stockholm, Sweden
$10.0M
raised

Polar is a subscription network for open-source maintainers and backers.

Jun 2025
Seed

Founder Contacts

30,000+ verified contacts

San Francisco, United States
$3.6M
raised

Securing Terraform deployments

Jun 2025
Seed

Founder Contacts

30,000+ verified contacts

Tel Aviv-yafo, Israel
$6.1M
raised

Observability and testing for your LLM application

May 2025
Seed

Founder Contacts

30,000+ verified contacts

San Francisco, United States
$3.3M
raised

The open source auth infrastructure for B2B SaaS

May 2025
Seed

Founder Contacts

30,000+ verified contacts

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