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Retell AI vs Slang AI

Slang AI publishes its pricing; Retell AI does not.

Both pages checked by August 19, 2026
Retell AIAI only
Pricing not published
no published plan
Developer-oriented platform to build, test, deploy and monitor AI voice and chat agents, billed a la carte per minute: a Retell voice-infrastructure rate plus a separately priced text-to-speech voice, a separately priced LLM and separately priced telephony.
Slang AIAI only
$399/mo
Core plan
Voice AI phone concierge purpose-built for full-service restaurants and hospitality groups that answers inbound calls 24/7 and books, changes, and cancels reservations directly in OpenTable, SevenRooms, Resy, Yelp, and Fishbowl.

The differences that matter

  • Retell AI offers a trial (New accounts start with $10 in free trial credits, no payment method required. You'll only need to add one if you want to purchase a phone number.); Slang AI advertises none.
  • Slang AI publishes prices. Retell AI makes you ask.

Feature by feature

CapabilityRetell AISlang AI
Live transferYesYes
Books appointmentsYesYes
Text follow-upYesYes
Outbound callsYesunstated
SpanishYesYes
Human backupNoNo
Call recordingsYesYes
TranscriptsYesYes
Spam screeningunstatedunstated
Custom voiceYesunstated
APIYesunstated

"unstated" means the vendor doesn't claim it in their own documentation. It is not the same as no — it means nobody will put it in writing.

Retell AI plans

PlanPublished priceIncludesOver that
Pay-as-you-go$0.07-$0.31/min for AI Voice Agents——
EnterpriseCustom Pricing for AI Voice Agents——

Slang AI plans

PlanPublished priceIncludesOver that
CoreStarting at $399 *per location——
PremiumStarting at $599 *per location——
EnterpriseCustom Pricing——

Retell AI sources

Slang AI sources