Side by side
LobbyStack vs What's up AI
Compare what each tool does, what it costs, and how it fits your workflow.
Designed for
Open-source AI receptionist for ready-to-book callers.
Translate and summarize voice messages.
Primary task
AI receptionist
Voice message transcription
Pricing
Freemium · Free + from $15/mo
Freemium · Free + from $0.99
Pricing details
Free + from $15/mo
Free + from $0.99
Billing cycle
Monthly
One-time
API access
Not documented
Not documented
Platforms
Web
iOS
Integrations
Not documented
Make
Source rating
No rating recorded
4.9 / 5 · 9 ratings
Catalog views
312
4k
Estimated monthly traffic
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Catalog imported
31 Aug 2026
30 Aug 2026
Listed strengths
- Open-source
- 24/7 operation
- Automates call answering
- Reduces missed calls
- Incoming call detail capture
- Transcribes voice messages
- Translates voice messages
- Works with WhatsApp, Signal
- Works with Threema, Telegram
- Summarizes longer messages
Listed limitations
- No CRM integration yet
- Limitations in complex call handling
- Dependent on business scheduling availability
- No automatic knowledge base updates yet
- Limited supported calendar tools
- Requires iOS 15.1 or later
- Subscription for unlimited use
- Limited language support
- Limited to one message per day (basic version)
- Limited platform support (Only for Whatsapp, Signal, Threema, Telegram)