Note: Images in this doc use Harmonic emerging from stealth as a fictional example to demonstrate the feature experience.
Harmonic is your source of truth for startup intelligence. We track stealth companies from the earliest possible moment—legal filings, LinkedIn signals, blog posts, news articles, and more—giving you visibility into opportunities before they become public knowledge.
Understanding Stealth Emergence
We've introduced stealth emergence indicators across the entire Harmonic platform, making it easier to understand when companies transition from stealth to public. You'll now see these indicators in every corner of the product: searches, lists, company and people profiles, and our Chrome extension.
Look for the "emerged" sun icon (☀️) throughout Harmonic. Hover over it to see when a company emerged from stealth and what they were previously known as.
Company Profiles View stealth emergence history directly on company profiles, including previous stealth names and emergence dates.
Searches + Lists View recently emerged stealth companies in your saved searches and lists.
Chrome Extension See stealth emergence indicators when browsing company websites or LinkedIn profiles.
💡 Search Tip: You can also filter to identify recently emerged companies in search results using "Stealth Emergence Date" in Advanced filters tab.
API Integration
When a company emerges from stealth, we provide purpose-built fields to track this transition:
Name Aliases We capture all previous names, including stealth identifiers:
"name_aliases": [
"Stealth Company (Max Ruderman)",
"Harmonic"
]
Related Companies Information Including detailed stealth emergence data:
"related_companies": {
"acquisitions": [],
"acquired_by": null,
"subsidiaries": [],
"subsidiary_of": null,
"prior_stealth_association": {
"emergence_date": "2025-06-14T22:34:06Z",
"previously_known_as": [
"Stealth Company (Max Ruderman)"
]
}
},
"stealth_emergence_date": "2025-06-14T22:34:06Z"
Bulk Data
New fields are available in bulk data exports under companies.related_companies.prior_stealth_association, including emergence_date and previously_known_as. The schema matches our API structure exactly.