Registry vs Presto Voice

Side-by-side comparison of features, pricing, and ratings

Analysis reviewed Live tool data as of 2026-07-18
Reviewed by our team on
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At a glance

DimensionRegistryPresto Voice
PricingFree (open source)Contact for pricing
Target MarketDevelopers building ACP-compatible clientsQSR chains with drive-thrus
Key FeatureCurated agent discovery with authenticationAutomated order taking with up to 95% non-intervention
IntegrationsGitHub, Zed Industries, JetBrainsElevenLabs, POS systems, Headset systems
Platform TypeAgent registry / directoryVoice AI automation platform
Open SourceYes (GitHub)No

Registry and Presto Voice serve completely different markets. Pick Registry if you're a developer needing a free, open-source directory of ACP-compatible agents with authentication. Pick Presto Voice if you're a QSR chain looking to automate drive-thru orders with voice AI and boost revenue. They aren't competitors.

Try RegistryTry Presto Voice
Registry
Registry

Curated registry of ACP-compatible agents with authentication.

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Presto Voice
Presto Voice

Drive-thru voice AI automation for QSR chains to boost revenue and efficiency.

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Pricing
Free
Contact Sales
Plans
—
—
Popularity
1 views
7.5k views
Skill Level
Intermediate
Intermediate
API Available
Platforms
WebCLIAPI
API
Categories
⚙️ Developer Infrastructure🤖 Automation & Agents
🤖 Automation & Agents
Features
Curated agent discovery with authentication requirement
Versioned agent entries (name, version, description)
Open source on GitHub with community contributions via pull requests
Searchable agent index with programmatic access via JSON endpoint
Registry JSON fetch via curl (https://cdn.agentclientprotocol.com/registry/v1/latest/registry.json)
Agent.json schema for submissions
Icon support (16x16 SVG recommended)
Fork-based submission workflow
Supports multiple agent types (coding, general-purpose)
Logout method stabilized for ending authenticated state
Session close stabilized for canceling in-flight work
Session resume stabilized for reconnection without history replay
Session info update notification stabilized for real-time metadata push
Transports Working Group formed for standardizing remote transports
Automated drive-thru order taking via voice AI
Up to 95% non-intervention rate on orders
Upselling engine for add-ons and specials
Integration with major POS and headset systems
Spectrum of voice AI models including ElevenLabs
Menu unification across locations
Phone ordering automation
24/7 availability and operation
Easy installation at scale with minimal disruption
Order accuracy improvement
Staff efficiency optimization
Measurable ROI metrics (revenue lift, upsell rate)
Real-time voice conversation for drive-thru
Enterprise-grade deployment for multi-site chains
Integrations
GitHub
Zed Industries
JetBrains
ElevenLabs
POS systems
Headset systems

Feature-by-feature

Registry is a developer-facing agent catalog that enforces authentication and versioned entries, with a JSON endpoint for programmatic access. It supports multiple agent types (coding, general-purpose) and uses a fork-based submission workflow. Presto Voice is an industry-specific voice AI platform for drive-thrus, achieving up to 95% non-intervention order taking. It includes an upselling engine with up to 88% offer acceptance rates and integrates with major POS and headset systems. Registry's features revolve around discovery and security (logout, session close), while Presto Voice focuses on order accuracy and revenue lift. The two products share no common functionality.

Pricing compared

Registry is free and open source, with no paid tiers. Presto Voice requires contacting sales for pricing, typical for enterprise B2B solutions. Registry's cost is zero but demands technical effort to use (curl, GitHub). Presto Voice likely has a significant upfront and recurring cost, but promises measurable ROI (up to 6% monthly revenue lift). For a QSR chain, the investment in Presto Voice can be justified by automation savings and upsell revenue. Developers or teams needing an agent catalog will find Registry cost-effective.

Who should pick which

  • Developer building an ACP client
    Pick: Registry

    Registry provides a free, searchable index of authenticated agents with JSON endpoint, perfect for integrating agent discovery into your client.

  • Agent creator seeking distribution
    Pick: Registry

    Registry offers a GitHub-based submission workflow and versioning, giving your agent visibility to ACP-compatible clients.

  • QSR chain operator
    Pick: Presto Voice

    Presto Voice automates drive-thru orders with voice AI, reduces staff burden, and increases average order value via upselling.

  • Franchise network manager
    Pick: Presto Voice

    Presto Voice supports multi-location deployment and integrates with major POS systems, ideal for standardization across franchises.

Frequently Asked Questions

Can I use Registry to find agents that work with any client?

No, Registry only lists agents that implement the Agent Client Protocol (ACP) and support authentication.

Does Presto Voice require hardware installation?

Presto Voice integrates with existing headset and POS systems, with easy installation at scale and minimal disruption.

Is Registry only for coding agents?

No, Registry supports multiple agent types including general-purpose agents, not just coding.

What kind of ROI can I expect from Presto Voice?

Presto Voice reports up to 6% monthly incremental revenue via upselling and up to 95% non-intervention rates, reducing labor costs.

Can I submit my own agent to Registry?

Yes, Registry is open source on GitHub and accepts community contributions via pull requests following the agent.json schema.

Does Presto Voice support phone ordering?

Yes, Presto Voice includes phone ordering automation in addition to drive-thru voice AI.

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Explore each tool further

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Last reviewed: July 18, 2026