Slang.ai vs Vapi

Pricing, features, platforms and who each one suits — side by side.

Slang.ai

Voice AI that answers restaurant phone calls and manages reservations

PaidVisit site

Vapi

Developer platform to build, test and deploy voice AI agents for phone calls

Free · from $29/moVisit site

Choose Slang.ai if…

you're in its core audience: restaurant owners, multi-location hospitality groups

Choose Vapi if…

you want a free plan to start with
you need an API to build on
you're in its core audience: developers, customer support teams

Side by side

FeatureS

Slang.aiV

Vapi

Pricing modelPaidFreemium

Starting price—$29/mo

Free plan

Free trial

API

Open source

Trains AI on your content—Yes

Data retentionKept as long as necessary to provide Services or business purposesDepends on customer config; free plan 14 days raw data; deleted on request

Security and compliance—SOC 2, HIPAA, PCI DSS

AI voice/phone agent—

AI takes actions—

Live translation—

PlatformsWebWeb, API

CategoryCustomer SupportVoice Agents

CompanyGablex Inc. (d/b/a Slang.ai)Vapi Inc. · United States

Full feature lists

S Slang.ai

Answers restaurant phone calls with interruptible voice AI
Reservation management with OpenTable, Resy, SevenRooms integrations
97 languages with automatic mid-call switching
20 premium voices and custom greetings
VIP routing of frequent diners to staff
Cross-selling reservations to sister locations
Real-time alerts for private events and lost items
Call recordings, summaries and quality review

V Vapi

Configurable voice, conversation flow and telephony
Call testing and simulation before going live
Real-time call monitoring and observability
Built-in AI conversation guardrails
Twilio, Vonage, Telnyx and Vapi SIP telephony
Model providers passed through at cost
SSO, OAuth and RBAC access controls
SOC 2, HIPAA and PCI compliance

Their home pages

What each vendor shows first: the pitch, the plans and the sign-up.

Slang.ai home page — S Slang.ai · slang.ai

What you'd pay

The cheapest plan that fits, per month, billed yearly where the plan offers it.

What the free plans include

Slang.ai

No free plan.

Vapi

$5 free credits to get you started
2 organizations
4 concurrent calls
14 days raw data retention

All plans and prices

Slang.ai

CoreFrom $399 per location

PremiumFrom $599 per location

EnterpriseCustom

Vapi

No Success Package$0 to start, $0.05/min hosting

Core$29

Pro10% of Vapi hosting fee, $999/mo minimum

PremierCustom

Strengths and limitations

Slang.ai

Integrates with OpenTable, Resy, SevenRooms, Tripleseat and Yelp
Supports 97 languages on Premium
Starting prices published per location
Vendor says setup takes under 30 minutes

No free trial mentioned
Built specifically for restaurants, not general businesses
Superhost and 97-language support require the Premium plan

Vapi

$5 free credits and no minimum minutes to start
Model provider costs passed through with no markup
Unlimited agents on every plan
SOC 2, HIPAA and PCI compliance

The hosting fee and provider costs add up; the page estimates $82–$129 for 1,000 minutes
HIPAA compliance is a $2,000/month add-on
The free tier has no support SLA and allows only 4 concurrent calls
Pro requires a $999/month minimum