comparisons · frontrun vs harmonic
frontrun vs Harmonic
Harmonic indexes companies once they're visible to the web. Frontrun sees investors move before the web does.
Harmonic is a company-formation index + agentic search - index-scale coverage of nearly every company that incorporates, with strong AI search. Frontrun is a different bet: it watches what 1,000+ venture investors do on X (who they follow) and flags companies months before a round, at $99/mo.
| Harmonic | Frontrun | |
|---|---|---|
| Signal type | Company formation / web presence (retrospective) | Investor follow-graph (pre-round, behavioral) |
| Earliest you hear about a company | When it becomes web-visible | Before any announcement, often at <100 followers |
| Price | Enterprise (~$26k/yr reported) | $99/mo, 7-day trial |
| Best for | Full market maps, coverage of everything | Sourcing deals before they're deals |
| Agent access | API + agentic search | API + MCP server (npx) |
the honest verdict
Complementary, not either/or. Harmonic for coverage, Frontrun for earliness - at ~1/20 the price. Many funds run both.
the receipts
Frontrun's flags carry dated provenance, so "we saw it early" is checkable per company:
- @techdollarhq - flagged at 13 followers, $3M pre-seed 123 days later
- @orthogonal_sh - flagged 184 days before a $4.3M round led by Pantera
- @rialto_xyz - flagged at 18 followers, 26 days before its Robinhood partner announcement
see the signal before you switch
7-day free trial · $99/mo · API + MCP for agents
read the full Harmonic alternatives guide · all comparisons · trending startups