Ruby pricing & cost
Law firms and professional services that specifically want human (not AI) answering — the price benchmark AI receptionists undercut.
Entry price
Call Ruby from $245/mo (50 min)
AI usage rate
Human receptionists, billed by the minute within plan
Free tier
No
Billing model
flat-tier + per-minute
Our verdict
The human-receptionist incumbent — included here as the benchmark: if you don't need a human, AI receptionists do it for a fraction.
Strengths
- Real human receptionists
- Established, trusted brand
Watch-outs
- Highest cost in the category (human service)
- No rollover minutes — unused are forfeited
- By-the-minute = unpredictable invoices
Who it's for
Law firms and professional services that specifically want human (not AI) answering — the price benchmark AI receptionists undercut. Typically a fit for solo, small teams.
Sources
Ruby alternatives
Free ($0.14/min); Build $299/mo ($0.12/min); Scale $499/mo ($0.11/min)
The 'no surprises' option — its headline rate is roughly the real rate, which is rare; you pay a monthly fee for that predictability.
Cartesia (Line)Free; Pro $5/mo; Startup $49/mo
A strong low-latency voice layer for builders — but the $0.06/min Line figure is before LLM and STT, so model the full stack.
Deepgram (Voice Agent API)$0 PAYG ($200 free credit)
The cost-sensitive, high-volume builder's pick — best free credit in the category, but mind the websocket-time billing.
Dialpad (AI Agents)Phone from $15/user/mo; AI Agents = contact sales
Buy it for the phone system with AI baked in — the autonomous voice-agent product, though, is a contact-sales black box.