Silux Voice vs Vapi.ai
Developer-first voice AI infrastructure (US-centric, cloud-only).
Honest comparison written by the team that built Silux Voice. Updated for 2026.
Silux Voice
$0 → $0.05/min
Free trial + Pay-as-you-go. From $24.99/mo Starter.
- ✅ Cross-call caller memory built in (Vapi has no native cross-call memory — it's a third-party add-on)
- ✅ All-in PAYG at $0.05/min — Vapi's $0.05 is hosting only, with STT, LLM and TTS billed on top
- ✅ Bundled FSM integrations (ServiceTitan / Housecall Pro / Jobber / FieldEdge)
- ✅ 14-day free trial with phone connectivity (Vapi free is web-only)
- ✅ In-call translation as a paid add-on (not available on Vapi)
Vapi.ai
$10/mo platform fee + usage
$0.05/min usage
- ➖ Developer ergonomics (Vapi has a slick playground; we ship a try-it sandbox)
- ➖ Streaming TTS first-token latency (~200ms; we match it and beat it on our fastest voice tier)
Where Silux Voice wins
- ✓Cross-call caller memory built in (Vapi has no native cross-call memory — it's a third-party add-on)
- ✓All-in PAYG at $0.05/min — Vapi's $0.05 is hosting only, with STT, LLM and TTS billed on top
- ✓Bundled FSM integrations (ServiceTitan / Housecall Pro / Jobber / FieldEdge)
- ✓14-day free trial with phone connectivity (Vapi free is web-only)
- ✓In-call translation as a paid add-on (not available on Vapi)
- ✓PCI-compliant payment-by-phone (secure DTMF capture)
- ✓White-label reseller program with revenue share
Where Vapi.ai matches us
Honest benchmarking — these are the dimensions where Vapi.ai is at parity or close.
- ≈Developer ergonomics (Vapi has a slick playground; we ship a try-it sandbox)
- ≈Streaming TTS first-token latency (~200ms; we match it and beat it on our fastest voice tier)
More comparisons + verticals
Silux Voice vs Bland.ai
AI phone calls API (US, cloud-only, outbound-heavy).
Silux Voice vs Synthflow
No-code AI voice agent builder.
Silux Voice vs Retell AI
Real-time voice agents with strong barge-in.
Receptionist for HVAC contractors
When the AC dies in July, the customer calls four contractors and books with the first one who picks up. If your office is on a job site, that's not you.
Receptionist for plumbers
A burst pipe at 6pm is an emergency for the customer and a booked job for you — but only if someone answers. Under a sink, you can't, and the caller dials the next plumber on Google.
Receptionist for electricians
Fault-finding, a dead consumer unit, a tripping circuit — the customer wants it fixed today. If you're mid-install and can't pick up, that booked job goes to the next sparky.
Try Silux Voice for free
30 minutes / month. No credit card required.