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Call Sandwich Inc.

Elite Retell Partner

Partner Since

March 23, 2026

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Supported Locations

Primary Customer Segment

Enterprise

Languages

English

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About Partner

Call Sandwich is a certified Elite Retell AI partner — the highest tier in Retell's partner program. We specialize in building enterprise-grade voice AI integrations for complex telephony environments that standard agencies won't touch. Our team connects Retell to legacy and modern stacks alike — ViciDial, Asterisk, FreeSWITCH, NICE inContact, Avaya, Talkdesk, Genesys, and more — handling everything from SIP trunk configuration to full white-label AI platform development. Whether you need outbound AI sales agents, enterprise inbound routing, AI + human handoff, or a fully white-labeled Retell platform, Call Sandwich delivers production-ready, multi-tenant deployments built to scale.

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La Crown Inc. is an AI automation agency founded by a 26-year freight brokerage veteran who got tired of watching businesses drown in repetitive tasks. We specialize in building voice AI systems powered by Retell AI — intelligent agents that handle carrier calls, customer follow-ups, compliance checks, and lead outreach around the clock. We don't just deploy AI; we engineer it around the real workflows of freight brokers, logistics operators, and business owners so it actually works on day one.

Freight & Logistics

AI Voice Agents

Workflow Automation

Coreventia helps small and medium sized service businesses handle customer enquiries more effectively so opportunities are not lost when calls are missed or responses are delayed. Our AI voice receptionists answer enquiries, capture key information, schedule appointments, and follow up automatically. AI and automation are no longer tools reserved only for large companies. Whether you are a solo entrepreneur or running a growing business, from clinics and plumbing companies to law firms and property management businesses, our systems help you stay responsive, reduce administrative workload, and grow efficiently without needing to add more staff.

AI Voice Receptionists

Lead Follow-up Automation

Workflow Automation

Legacy AI is a conversational AI agency specialising in building chat and voice AI agents. As a team of 8 talented AI Engineers, we've partnered with 46+ businesses across restaurants, travel, hospitality, insurance, real estate/property management and other service industries, helping them eliminate operational bottlenecks, eliminate missed clients from missed calls, and recover lost revenue. Our clients include some of the fastest-growing brands in their categories, including a $250 Million Restaurant Franchise over 200 Locations in North America, to one of the world's largest travel agency. We truly believe in our ability to be your AI and Software Development Partner.

AI Receptionist

Custom Development