Scenario: you compete with an incumbent vendor and want to know which entities run it today, how central it looks in each stack, and when that changes. The vendor-stack corpus answers all three — from statements the entities published themselves. This is one workflow the API supports, and it composes from the same three endpoints as the others.
Workflow walkthrough · Competitive intel
Displacement intelligence with evidence
curl "https://vendorradar-production.up.railway.app /v1/prospect?vendor=twilio&page=1" \ -H "Authorization: Bearer $VR_KEY"
{
"vendor": "twilio",
"total": 1417,
"companies": [
{
"domain": "notify-hq.com",
"confidence": "vendor_keyword",
"evidence": {
"source": "https://notify-hq.com/legal/subprocessors",
"quote": "Twilio Inc. — SMS and voice message delivery"
}
}
],
"credits_used": 1
}Note the omitted category parameter: unfiltered, you also catch entities using the competitor outside your core category — useful for sizing the whole footprint.
Step 2 — Read the row, not just the match
The quoted evidence carries more information than the boolean. A row that reads "Twilio Inc. — SMS and voice message delivery" describes a production dependency. One that reads "Twilio (Authy) — two-factor authentication" describes a narrower, easier-to-displace integration. The confidence tier formalizes part of this — vendor_keyword means the row itself describes the category function — but the verbatim quote is there so your team (or your model) can judge nuance directly.
Step 3 — Cross-reference the rest of the stack
For priority targets, pull the full profile and look at the adjacent categories:
curl "https://vendorradar-production.up.railway.app /v1/company/notify-hq.com" \ -H "Authorization: Bearer $VR_KEY"
An entity disclosing the competitor plus a modern adjacent stack (say, Segment and Datadog) is likely mid-modernization — a good displacement conversation. An entity whose vendor stack hasn't changed in two years is probably not shopping.
Step 4 — Track changes over time
The underlying sources are first-party and actively maintained, so changes are meaningful. Re-pull profiles monthly (1 credit each, always instant) and diff:
- Competitor disappears from an entity's stack — the displacement already happened; find out who won it.
- Your category appears at an entity that lacked it — a new buyer entering the market.
- A second vendor appears in the same category — often a migration in progress; both incumbency and displacement are live.
For entities where the indexed scan is stale and the deal is active, a fresh=true lookup (same 1 credit, just slower) re-reads the sources today. If the scan can't locate vendor evidence, it charges nothing.
Keeping it honest
Everything above is built from public, first-party statements — there's no inference about private contracts, spend, or renewal dates, and found: false only ever means no evidence was located. What you get is a defensible, citable map of vendor relationships, each backed by a quoted source, refreshed on your schedule.
Start with the 25 free credits — two pages of reverse lookup and a handful of profiles — or see the API reference for full parameter details.