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Pre-Seed Open Source Companies

Explore 47 open source startups that raised pre-seed funding. Access verified founder contact information and fundraising data.

Total Companies
47
Total Funding
$15.0M
Avg Funding
$681K
Cities
12

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Charlotte, United States
$55K
raised

Leantime is an open source project management system for non-project managers using behavioral science and AI to make work engaging.

Jun 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

Exploding Gradients is into building an open-source evaluation and testing infrastructure for LLM applications.

Apr 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

Lantern is the simplest method to construct AI apps using Postgres.

Apr 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

nCompass Technologies enables fast and unlimited deployment of LLMs.

Apr 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

Pretzel AI is a modern, open-source Jupyter Notebook replacement for data scientists and analysts.

Apr 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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$1.6M
raised

Coana uses advanced reachability analysis to scan for vulnerabilities in open source dependencies, cutting false positives by over 80%.

Jan 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

Barcelona, Spain
$1.2M
raised

Genie builds low/no-code tools for quickly creating and deploying data apps.

Oct 2023
Pre-Seed

Founder Contacts

41,000+ verified contacts

New York, United States
$500K
raised

RecipeUI is an open source postman alternative for viewing and debugging GraphQL requests in Chrome and Firefox.

Sep 2023
Pre-Seed

Founder Contacts

41,000+ verified contacts

Jersey City, United States
$500K
raised

Epsilla is a one-stop Retrieval-Augmented Generation as a Service platform for building LLM applications connected with proprietary data

Aug 2023
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$2.2M
raised

UpTrain develops an open-source toolkit to observe and refine AI applications.

Apr 2023
Pre-Seed

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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San Francisco, United States
$500K
raised

DAGWorks develops an open-core platform for data science teams to develop, produce, and maintain machine learning.

Apr 2023
Pre-Seed

Founder Contacts

41,000+ verified contacts

Portland, United States
$500K
raised

moonrepo is an open-source build tool for monorepos and large codebases.

Apr 2023
Pre-Seed

Founder Contacts

41,000+ verified contacts

London, United Kingdom
$500K
raised

Trigger.dev is a coding tool for automating complex workflows.

Apr 2023
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

AI Document Processing

Apr 2023
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$1.5M
raised

Helicone is an open-source observability platform for generative AI.

Apr 2023
Pre-Seed

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Dublin, Ireland

Contember is a software company that specializes in AI and typescript for data fetching instantly.

Jan 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

PearAI is an open-source, AI-powered code editor that integrates AI tools to streamline development.

Dec 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

Velum Labs provides a firewall that redacts sensitive information in data and documents.

Dec 2025
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

OpenBuilder is the vibe coding platform that helps non-technical builders take their ideas to production.

Dec 2025
Pre-Seed

Founder Contacts

41,000+ verified contacts

Reggio Nell'emilia, Italy
$1.2M
raised

Pioneering Data Management for Physical AI and Robotics.

Jan 2026
Pre-Seed

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Carver, United States
$250K
raised

Open Source Software Development

Jan 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

Suwalki, Poland
$500K
raised

Reactive Data Processing Company

Oct 2021
Pre-Seed

Founder Contacts

41,000+ verified contacts

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