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Pre-Seed Developer APIs Companies

Explore 83 developer apis startups that raised pre-seed funding. Access verified founder contact information and fundraising data.

Total Companies
83
Total Funding
$5.7M
Avg Funding
$711K
Cities
7

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Las Vegas, United States
$250K
raised

Assail AI develops Ares, an agentic AI platform for autonomous offensive security testing targeting mobile apps, APIs, web infrastructure.

Jan 2026
Pre-Seed

Founder Contacts

41,000+ verified contacts

Seattle, United States

AgentRouter provides an API routing platform that lets AI agents discover, pay for, and execute third-party APIs.

Jan 2022
Pre-Seed

Founder Contacts

41,000+ verified contacts

Toronto, Canada
$750K
raised

One API for Every crypto integration. Vezgo, a Crypto SaaS API, helps fintechs onboard Web3 users faster and easier.

Nov 2022
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

Captain Technologies offers an API solution to make unstructured data searchable in natural language.

Nov 2025
Pre-Seed

Founder Contacts

41,000+ verified contacts

Miami, United States
$440K
raised

A Google certified CMP. Get, centralize and use users consents.

Oct 2021
Pre-Seed

Founder Contacts

41,000+ verified contacts

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Orlando, United States
$350K
raised

Rethinking the way that Identities and Security are integrated, protected and exposed

Oct 2022
Pre-Seed

Founder Contacts

41,000+ verified contacts

Paris, France
$2.9M
raised

The Agent Gateway. Cut Token Costs up to 50%.

Oct 2024
Pre-Seed

Founder Contacts

41,000+ verified contacts

San Francisco, United States
$500K
raised

Synthetic is an online platform that lets users run and interact with open‑source large language models privately without storing user data.

Oct 2025
Pre-Seed

Founder Contacts

41,000+ verified contacts

Showing 76 to 83 of 83 companies

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