Zero vs Presto Voice

What users praise

• • Open-source and transparent about security architecture.
• • Runs each task in isolated Firecracker microVMs with hardware-level KVM.
• • Credentials never exposed to agent code; all traffic audited.
• • Supports bring-your-own-LLM keys for cost control.

What frustrates them

• • No genuine community reviews or testimonials available.
• • Name collision with a popular fasting app causes confusion.
• • Credit-based pricing can be unpredictable for heavy users.
• • Limited evidence that automations work reliably in production.

What users praise

• • Vendor claims up to 95% non-intervention on drive-thru orders, saving labor costs.
• • Claims an upselling engine with 88% offer acceptance and 6% revenue lift.
• • Runs a spectrum of Voice AI models to adapt to different menus and speech patterns.
• • Has 15+ years of restaurant-industry experience and national rollout references.

What frustrates them

• • No independent user reviews or community validation of the vendor's claims.
• • Brand name 'Presto' is confused with unrelated products like canners and transit cards.
• • App Store reviews for a similarly named app cite glitches, autoload failures, and connection errors.
• • Tourists report being locked out of the related Presto transit app without a Canadian address.