Legacy AI is a custom development Voice AI agency specialising in building chat and voice AI agents. As a team of 8 talented AI Engineers, we've partnered with 52+ businesses across solar, 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.

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The AI Agency USA builds custom Voice AI agents, automations, and software that run the operational core of a business. Our Voice AI agents answer every call in one ring, 24/7 — booking appointments, qualifying leads, and routing urgent calls to a human — while our custom apps, CRM systems, and AI automations eliminate the repetitive busywork that drains teams. Every engagement starts with an AI Audit that maps your operation and scores each opportunity by ROI, so you begin with the fix that pays for itself fastest. Based in Las Vegas and serving 14+ industries — including healthcare, legal, collections, financial services, and real estate — we build everything custom, nothing off the shelf, and train your team to run it.

MD Software & Design has over 20 years of experience supporting large mid-sized companies and enterprises in industries such as insurance, banking, logistics, and automotive. We specialize in the integration of Voice AI agents and advanced AI tools into both legacy and new systems, enabling the modernization and expansion of existing IT landscapes. Our services include connecting complex legacy environments with new technologies, as well as guiding clients through the migration and transformation of business-critical platforms. We deliver practical, reliable solutions tailored to each client's needs.

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.

Black Umbrella AI builds and deploys AI voice agents for businesses that are tired of leaky pipelines, missed follow-ups, and no-shows killing their ROI. We specialize in end-to-end Retell agent setup for companies that want production-grade calling infrastructure without the DIY learning curve. What makes us different: we come from the marketing side of the table, not just the engineering side. Our founder has 10+ years in direct response and has managed over $50M in ad spend across 30+ verticals, so we don't just build agents that talk, we build agents that convert. Every Retell deployment we ship is engineered around pipeline velocity: more conversations, better qualification, faster booked calls. Our agent setup service includes voice and prompt engineering, objection handling frameworks pulled from real sales floors, full integration with GoHighLevel, n8n, and your existing CRM stack, plus post-launch testing and optimization. We offer both done-for-you builds and white-glove training for teams that want to run agents in-house.