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Trusted by top teams to build pipeline faster
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Harmonic is the source of truth for startups

Harmonic helps you find startups ready to buy before your competitors do. Get real-time signals on hiring, funding, and company milestones.

Reach out when the timing is perfect, not when your outreach is just noise. Proprietary data on millions of startups with AI that automates prospecting from discovery to decision.

Meet Scout
The AI that understands startups
Learn more
Alert me when someone leaves #TopAI-Labs and starts something in stealth.
Scouts that run on your schedule
Describe the job once. Your Scouts do the work and tell you when there’s something worth your attention.
Portfolio momentum breakouts
Weekly on Fridays
Stealth founder triage
Mondays at 8 AM
Exit & M&A scanner
First Monday every month
Hiring & talent tracker
Daily at 8 AM
New funding sweep
Mondays at 8 AM
Leadership change watch
Every other Tuesday

Reach out when the time is right

Automated, event-based signals trusted by leading investors for:
  • Fundraises: new budget, new priorities
  • Hiring: first sales hire, CFO, security roles — team expansion that signals your product fits
  • Growth milestones: new markets, product launches, traffic surges

Deep research reports for smarter outreach

Understand what they're building, who they compete with, what makes them different, and why now. Generated in seconds.

Enhance your entire workflow

Map and monitor your team’s network
Track connections, movements and communications, making every intro warm
Organize sourcing and win deals on Harmonic
Manage your top-of-funnel with custom fields or enrich your CRM with our API
Instant insights from the Harmonic Chrome Extension
Download Extension

Agent-ready

Live data on companies, founders, investors, and how your team is connected to them, without leaving your workflow.

Purpose-built MCP
Harmonic intelligence in every conversation with your AI
Not coding? No worries
Zapier and n8n bots can keep your workflow up to date with the latest data from the source of truth about startups
Bulk data for optimal flexibility
The complete startup database delivered directly to your data warehouse or cloud
Harmonic API
Always up to date, always production ready and tailored to your integration
Read the Docs

Meet the companies
leveling up with Harmonic

Data-driven by design: How Draper’s interns built its AI stack on Harmonic

Draper
Draper
x
x
Harmonic

Selling through cap tables: How Rillet turns fund portfolios into pipeline with Harmonic

Rillet
Rillet
x
x
Harmonic

The non-linear hire: How Kindred Partners finds the leaders other searches miss

Kindred
Kindred
x
x
Harmonic

The spike factor: How GTMfund finds exceptional founders before the market

GTMfund
GTMfund
x
x
Harmonic

PostHog turns startup momentum into a retention advantage with Harmonic

PostHog
PostHog
x
x
Harmonic

Recruiting at startup speed: How Quantum turns market data into hiring power with Harmonic

Quantum Talent
Quantum Talent
x
x
Harmonic

Inside Sorenson Capital’s repeatable, relationship-driven sourcing engine

Sorenson Capital
Sorenson Capital
x
x
Harmonic

Airtree’s playbook for early-stage discovery with Harmonic

Airtree
Airtree
x
x
Harmonic

How Antler Elevate builds a smarter Series A funnel at global scale

Antler
Antler
x
x
Harmonic

Inside NGP Capital’s data-driven investment engine

NGP Capital
NGP Capital
x
x
Harmonic