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Seed Companies in San Diego

Explore 150 seed startups based in San Diego, United States. Access verified founder contact information and fundraising data.

Total Companies
150
Total Funding
$74.7M
Avg Funding
$3.0M
Industries
12

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AI Infrastructure
$350K
raised

IgniteIQ provides AI transformation and automation services for home services companies in HVAC, plumbing, electrical, and garage doors.

Sep 2026
Seed

Founder Contacts

41,000+ verified contacts

$4.3M
raised

EULER is the Agentic PRM: AI agents that run partner operations and turn partner activity into repeatable revenue.

Aug 2026
Seed

Founder Contacts

41,000+ verified contacts

Biotechnology
$10.0M
raised

Rybodyn is a biotechnology research company that develops therapeutics to train the immune system to detect and eradicate cancer internally.

Jul 2026
Seed

Founder Contacts

41,000+ verified contacts

Artificial Intelligence (AI)
$20.0M
raised

Aether is a new class of AI systems that understand mechanisms, reason under intervention, and operate reliably in real-world systems.

Jun 2026
Seed

Founder Contacts

41,000+ verified contacts

Artificial Intelligence (AI)

Harbor generates clinical trial forms, captures source data, and monitors study data for research and regulatory compliance.

Jun 2026
Pre-Seed

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Artificial Intelligence (AI)
$275K
raised

Swastham.ai is a developer of AI-powered cancer monitoring platform delivering personalized healthcare insights.

Jun 2026
Seed

Founder Contacts

41,000+ verified contacts

Aerospace
$7.3M
raised

Reaxiomatic focuses on initiatives and projects aimed at increasing American capability.

Jun 2026
Pre-Seed

Founder Contacts

41,000+ verified contacts

Artificial Intelligence (AI)
$25K
raised

Magier AI’s revolutionary ecosystem seamlessly shields both individuals and enterprises with advanced privacy—reimagining data security.

May 2026
Pre-Seed

Founder Contacts

41,000+ verified contacts

Biotechnology

Ampa Health is a health technology business developing scalable brain stimulation technologies to treat depression, anxiety, and addiction.

May 2026
Seed

Founder Contacts

41,000+ verified contacts

Advertising
$1.6M
raised

Oddsguard is a browser-based odds comparison tool that overlays real-time sportsbook pricing directly within the user’s betting experience.

Apr 2026
Seed

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Artificial Intelligence (AI)
$1.9M
raised

Footage is an AI video agent that writes briefs, generates clips, and edits video so you can focus on your creative vision.

Apr 2026
Pre-Seed

Founder Contacts

41,000+ verified contacts

$310K
raised

Home Care Placement provides in-home care, senior placement, and care management services for families.

Apr 2026
Seed

Founder Contacts

41,000+ verified contacts

Artificial Intelligence (AI)
$279K
raised

AI voice-first app that detects emotions and matches people through personalized audio and voice-based compatibility.

Apr 2026
Pre-Seed

Founder Contacts

41,000+ verified contacts

Artificial Intelligence (AI)
$129K
raised

Xccelera provides data engineering, analytics, and AI services to help organizations manage and use data.

Apr 2026
Seed

Founder Contacts

41,000+ verified contacts

$525K
raised

The Reflux Company is a medical technology firm specializing in minimally invasive solutions for diagnosing and treating.

Apr 2026
Seed

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Artificial Intelligence (AI)
$4.3M
raised

Acurion develops AI-driven diagnostic solutions that extract actionable genomic biomarker insights from standard pathology images.

Apr 2026
Seed

Founder Contacts

41,000+ verified contacts

Artificial Intelligence (AI)
$8.0M
raised

Manifold Security provides runtime visibility and protection for autonomous AI agents operating on enterprise endpoints.

Mar 2026
Seed

Founder Contacts

41,000+ verified contacts

$300K
raised

AI-assisted custom-domain business email for small teams, with branded mailboxes, migration, templates, and smarter follow-up.

Mar 2026
Pre-Seed

Founder Contacts

41,000+ verified contacts

Dietary Supplements

Radicle Science is a health tech company that offers an accelerated, non-FDA route to drug validation.

Feb 2026
Seed

Founder Contacts

41,000+ verified contacts

Medical Device

UpLyft is the first seated self-transfer system between bed and wheelchair for people with limited mobility.

Jan 2026
Seed

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
Unlimited exports
No credit card required
$2.0M
raised

Whistle Performance provides AI-driven sports and human performance analytics software for teams and organizations.

Jan 2026
Seed

Founder Contacts

41,000+ verified contacts

Financial Services
$10.0M
raised

Atomic Insights offers money-movement and process automation products for RIAs and family offices.

Jan 2026
Seed

Founder Contacts

41,000+ verified contacts

Aerospace
$500K
raised

Zephyr Fusion builds fusion powered satellite technologies that enable megawatt scale energy and aerospace operations in orbit.

Dec 2025
Pre-Seed

Founder Contacts

41,000+ verified contacts

Artificial Intelligence (AI)
$2.7M
raised

Nome is the Operating System for Personalized Therapies™ — developing custom treatments for rare disease patients, families, and clinicians.

Oct 2025
Seed

Founder Contacts

41,000+ verified contacts

Assistive Technology

Psyonic is a dvanced bionic limbs that are accessible to all people with amputations.

Oct 2025
Seed

Founder Contacts

41,000+ verified contacts

Showing 1 to 25 of 150 companies

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