Silux Voice vs Retell AI
Real-time voice agents with strong barge-in.
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 — returning callers never repeat their details
- ✅ ~62% cheaper PAYG ($0.05 vs ~$0.13 all-in once LLM, TTS and telephony are added)
- ✅ Bundled FSM integrations
- ✅ PCI payment-by-phone
- ✅ In-call translation
Retell AI
$0
~$0.13 all-in/min usage
- ➖ Production-grade VAD / barge-in (we match with silero VAD + sentence-boundary TTS)
- ➖ 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 — returning callers never repeat their details
- ✓~62% cheaper PAYG ($0.05 vs ~$0.13 all-in once LLM, TTS and telephony are added)
- ✓Bundled FSM integrations
- ✓PCI payment-by-phone
- ✓In-call translation
- ✓White-label reseller
- ✓Voice cloning included (Retell adds extra)
Where Retell AI matches us
Honest benchmarking — these are the dimensions where Retell AI is at parity or close.
- ≈Production-grade VAD / barge-in (we match with silero VAD + sentence-boundary TTS)
- ≈TTS first-token latency (200ms; we match it and beat it on our fastest voice tier)
More comparisons + verticals
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Silux Voice vs Bland.ai
AI phone calls API (US, cloud-only, outbound-heavy).
Silux Voice vs Synthflow
No-code AI voice agent builder.
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.