Head to head
JustCall vs Retell AI
Written By Research Team
AI Outbound Calling
Fact Checked
All pricing verified against vendor documentation
Updated
Higher score
JustCall
A mature, fully-priced sales phone system that added a credible AI voice agent.
JustCall scores high for reasons that have nothing to do with AI hype: it publishes every seat price, and it holds the broadest certification set we found — SOC 2, HIPAA, ISO, PCI DSS, GDPR and CSA STAR. If your blocker is procurement rather than capability, this is the path of least resistance. The caveat matters though: its AI Voice Agent starts at $0.15/min, which is more expensive per minute than Bland, Retell or Vapi, and the core product is still a seat-based phone system.
Retell AI
The most granular, itemised pricing in the category — and the easiest honest cost model to audit.
Retell publishes a full component breakdown: voice infrastructure, TTS, each LLM, and every add-on priced separately. That is unusual and genuinely pro-buyer — you can model your real cost per minute before signing anything. It is also the most generous free start, with $10 in credits and 20 concurrent calls at no cost. The trade-off is that the headline '$0.07–$0.31/min' is a wide band, and your actual rate depends entirely on which model you pick.
Side by side
| Criterion | JustCall | Retell AI |
|---|---|---|
| Overall score | 87/100 | 84/100 |
| Rank | #3 | #4 |
| Type | AI-assisted dialer | Autonomous AI agent |
| Pricing model | Published | Published |
| Headline cost | $29–$89 per user/mo billed annually; AI Voice Agent from $0.15/min | $0.07–$0.31/min depending on voice and model, from $0 with $10 free credits |
| Concurrency | Seat-based; unlimited minutes on Business tier | 20 free concurrent calls; additional concurrency $8/mo each |
| Free trial | 14-day free trial, no credit card | $10 in free credits and 20 free concurrent calls |
| Certifications | SOC 2, HIPAA, ISO, PCI DSS, GDPR, CSA STAR Level One | SOC 2 certified, HIPAA-ready, Custom SSO, Dedicated server on Enterprise |
Score by criterion
| Criterion | Max | JustCall | Retell AI |
|---|---|---|---|
| Pricing transparency | 20 | 19 | 18 |
| Outbound capability | 20 | 12 | 17 |
| Compliance & security | 20 | 20 | 15 |
| Integrations & extensibility | 15 | 14 | 12 |
| Time to first call | 15 | 15 | 14 |
| Scale & reliability | 10 | 7 | 8 |