These are different models, not different vendors of the same thing.
Angi Leads (formerly HomeAdvisor Pro) sells inbound homeowner inquiries. A homeowner submits a request; Angi sells it to several contractors; you pay per lead and compete for the call.
Build Siren gives you building-permit intelligence: real, permitted projects at known addresses across Southeast Michigan, filtered to your trade and scored — that you reach out about first, before competitors know they exist. Flat monthly price, unlimited permits, no sharing.
| Build Siren | Angi Leads | |
|---|---|---|
| Lead type | Permitted project (address, scope, value) | Homeowner contact form |
| Shared with competitors? | No | Yes, typically several |
| Pricing | Flat monthly (from $99) | Per lead ($30–$150 range) |
| Direction | Outbound (you contact them) | Inbound (they requested contact) |
| Coverage | Southeast Michigan | National |
Choose Build Siren if you want an exclusive, controllable pipeline and are willing to do outreach. Choose Angi if you specifically want inbound calls and accept the shared model and per-lead cost. Many contractors run both — Build Siren for the daily base, a capped Angi budget for slow weeks. See alternatives to Angi Leads.
Request Build Siren access — from $99/month. Call (248) 290-8979. See permit leads by trade.