Harmonic

Harmonic

Harmonic is a startup discovery and enrichment platform with 29M+ companies and 190M+ people. Search, enrich, and manage deal flow with company data, founder profiles, funding history, investor networks, saved searches, and company/people lists.

Data Model

• Company watchlists — saved company cohorts; expand a watchlist to harvest urn:harmonic:company:{id} tokens for downstream enrichment.
• People watchlists — same pattern for talent pipelines, yielding urn:harmonic:person:{id} identifiers.
• Company URN format: urn:harmonic:company:{id}. Required for enrichment status, attachments, and similar companies.
• Person URN format: urn:harmonic:person:{id}. Required for person-level operations.
• Investor URN format: urn:harmonic:investor:{id}. Used for investor search and co-investor lookups.
• Saved Searches drive company, people, and investor search results. List saved searches first, then get results.

Gotchas

• Tier restrictions: Watchlists and attachments work on all tiers. Enrich, search, and fetch require higher tiers.
• Rate limit: 600 calls/minute (10/sec). Check X-Ratelimit-Remaining-Second header. Only 200 responses count toward usage.
• Enrichment is async: Poll enrichment status endpoints until the job reports completion—responses are not synchronous.
• URN vs ID: Parameters alternate between fully qualified URNs and bare numeric ids; mirror whatever shape the endpoint documentation expects.