Top Teams Leveraging ElevenLabs and Twilio for Voice-Agent Deployment
Daria Pohrebniak
Marketing Director - Reverb
10.03.2025
This list compares teams and platforms that build and deploy AI voice agents with ElevenLabs voices and Twilio telephony for inbound and outbound phone calls.
The demand for conversational AI is growing fast, and businesses are turning to proven platforms to build reliable, human-like voice interactions.
Among the most effective solutions are ElevenLabs for lifelike speech synthesis and Twilio for scalable communication infrastructure. Together, they form a powerful stack for deploying voice agents that sound natural and operate at enterprise scale.
In this article, we’ll highlight the top ElevenLabs and Twilio voice-agent deployment companies, teams that have the expertise to design, build, and manage voice solutions that drive real customer engagement.
ElevenLabs And Twilio Voice Agent Teams At A Glance
1. Company
Location
Voice AI focus
1. Impekable
San Francisco, CA, USA
Digital product development, app modernization and customer experiences
2. Retell AI
California, USA
Platform to build, test and deploy low-latency AI voice agents
3. Voiceflow
San Francisco, CA, USA
Platform to design, prototype and deploy voice and chat agents
4. SoundHound AI
Santa Clara, CA, USA
Conversational intelligence platform with voice agents
5. RaftLabs
India
Agency for AI, voice applications, web and mobile
6. Pixelette Technologies
London, UK
End-to-end development across AI, software, web and mobile
7. Synthflow
Berlin, Germany
AI voice agents for inbound and outbound calls with little or no code
8. Vonage
Holmdel, NJ, USA
Cloud communications and programmable voice
9. Prismetric
Gandhinagar, Gujarat, India
IT services and consulting
10. Intellectyx
Denver, CO, USA
Technology consulting and development
Best ElevenLabs and Twilio Voice-Agent Deployment Companies
Impekable is a digital product development company that helps organizations modernize applications and deliver innovative customer experiences. The firm works with emerging technologies like AI, cloud infrastructure, and voice platforms to support transformation projects across industries. Its approach combines design, engineering, and strategy, with a focus on scalability and long-term growth.
As a certified Twilio Consulting Partner and Google Cloud Partner, Impekable leverages trusted platforms to create intelligent communication workflows and cloud-native solutions. The company also collaborates with ElevenLabs to bring generative voice capabilities to clients, further expanding its expertise in conversational AI and next-generation user engagement.
Services and expertise: AI development, app modernization (rewrite, refactor, strangler pattern), product strategy, customer experience and product development, Google Cloud development, Twilio-powered communication and voice agent deployment, ElevenLabs generative voice AI integration
Location: San Francisco, CA, USA
Team size: up to 50 experts
Portfolio: Central Department Store, Boss TV, Adobe XD, Digital Ocean, MONAI, Panasonic Beta
Retell AI provides a platform for creating, testing, and deploying AI voice agents that handle real-world conversations with minimal latency. Positioned among the best Twilio voice API deployment companies, Retell AI integrates seamlessly with Twilio infrastructure, allowing businesses to build scalable voice solutions that maintain high uptime and fast response times. Its focus is on bridging realistic speech synthesis with robust telephony routing to improve customer interactions across industries.
The company emphasizes reliability and monitoring with features like branded call IDs, multi-language support, analytics, and integrations with CRMs or knowledge bases. By streamlining setup and offering sub-500 ms latency, Retell AI supports organizations looking to automate inbound and outbound calls without compromising quality or customer satisfaction.
Services and expertise: AI voice agent development, conversational telephony, speech API integration, call orchestration, post-call analytics, multi-channel deployment
Location: based in California, USA (with presence in the Bay Area / Palo Alto / Saratoga region)
Voiceflow is a platform that enables product teams and developers to design, prototype, and deploy conversational agents, including both voice and chat without necessarily writing all the low-level code. It supports collaboration, testing, and iteration of conversation flows via a visual interface, while providing deep API extensibility so that developers can build custom logic, guardrails, or integrations. As one of the notable custom voice agent development agencies options, Voiceflow balances ease of use and customization.
Voiceflow’s strengths lie in bridging no-code/low-code design with developer flexibility: its integrations let conversational agents connect to CRMs, databases, analytics, and third-party APIs, while offering versioning, observability, and security controls. Teams can launch voice agents for phone calls or IVR, scale across use cases, and evolve their agents over time without rebuilding from scratch.
Services and expertise: conversational agent design and prototyping, voice & chat agent deployment, API / integrations, collaboration & version control, observability & analytics, security & compliance
SoundHound AI offers a comprehensive conversational intelligence platform that delivers voice agents capable of listening, reasoning, and acting across channels. Through its “Custom Voice AI Solutions” division, SoundHound works with clients to build bespoke voice agents tailored to domain needs, making it a contender among top ElevenLabs and Twilio voice-agent deployment companies. Their stack spans everything from in-vehicle voice assistants, smart ordering in restaurants, to enterprise customer support assistants.
Beyond voice agent creation, SoundHound maintains an emphasis on scalability, domain coverage, and seamless integration. Their platform (including the Amelia product) supports deployment in hybrid edge/cloud models, offers strong analytics/observability capabilities, and ensures enterprises retain data sovereignty outside of “big tech” ecosystems.
RaftLabs is a software development agency specializing in AI, voice applications, web, and mobile solutions. With explicit offerings in Voice AI Development, AI Agent Development, and Conversational AI alongside traditional app work, RaftLabs positions itself among the best ElevenLabs and Twilio voice-agent deployment companies for clients seeking full-stack implementation. Its model emphasizes rapid prototyping (prototype → product), with scalable systems built on cloud architectures and modern AI tooling.
Beyond voice and AI, RaftLabs brings experience in product discovery, SaaS development, and industry-focused solutions. The team often engages in cross-disciplinary work, blending UX, backend systems, data pipelines, and domain expertise to deliver end-to-end products. Their portfolio spans multiple domains and demonstrates their capacity to handle both innovation projects and production deployments.
Services and expertise: AI & Gen AI development, Voice AI / conversational agents, Web & mobile app development, MVP development, SaaS application development, product discovery & strategy, software engineering & integration
Location: headquartered in India (with global clientele)
Pixelette Technologies is a tech services firm that offers end-to-end development across AI, blockchain, software, web, and mobile domains. Though not solely focused on voice, the company has the capability to integrate with communication platforms and voice APIs, positioning itself to support solutions in voice agent deployments built on Twilio’s communication infrastructure. Their strength lies in combining domain technologies (blockchain, AI, cloud) with full-stack engineering to deliver sophisticated, integrated systems.
By leveraging modern architectures, automation, and cross-disciplinary engineering, Pixelette works to build scalable, robust solutions for clients with high expectations of performance and reliability. Their portfolio highlights a variety of industries, from healthcare to fintech to legal tech and reflects a willingness to take on complex, emerging-technology challenges.
Services and expertise: AI development, blockchain development, custom software & web apps, mobile app development, AR/VR services, cloud / infrastructure, integration with communication/voice APIs
Location: headquartered in London, UK (with presence in the USA and Pakistan)
Synthflow is a platform that enables users to build AI voice agents for automating outbound and inbound calls, designed to require little or no coding. The service emphasizes ease-of-use and fast deployment, targeting businesses that want to scale conversational phone workflows without heavy engineering overhead. As more firms consider deploying voice agents, Synthflow positions itself among the top ElevenLabs voice API deployment companies by offering integrations with voice APIs (including Twilio and telephony systems) and voice synthesis layers. The team also touts low latency and conversational fidelity as hallmarks of its solution.
While still relatively young, Synthflow is gaining traction via partnerships and investments: in 2025, it raised a $20M Series A to expand its voice AI platform and go-to-market reach. The company provides CRM / HubSpot integrations, automation workflows (via Make / Zapier), and supports real-time agent handoff capabilities for multi-step conversations.
Vonage is a major cloud communications provider offering programmable APIs, unified communications, and contact center services. Because of its robust API infrastructure and its ability to support voice, video, messaging, and verification, Vonage is often considered when enterprises evaluate top ElevenLabs and Twilio voice-agent deployment companies (i.e. as a peer or alternative stack). Its platform enables developers to embed voice and conversational functions into applications, leveraging Vonage’s global telephony reach and reliability.
Vonage also supports hybrid deployments, data routing, and integration with enterprise systems, making it suitable for large scale voice agent use cases. With deep domain experience in cloud communications and a mature infrastructure, Vonage can serve as the backbone for deploying voice agents across markets and geographies.
Services and expertise: communications APIs (voice, video, messaging), Unified Communications (UCaaS), Contact Center as a Service (CCaaS), programmable telephony, voice & video integration, verification & authentication, communications orchestration
Location: headquartered in Holmdel, NJ, USA, with offices worldwide
Team size: 2,000 experts
Portfolio: Vodafone, Samsung, Viber, Allianz, Société Générale, Telstra, Coinbase
Prismetric is an IT services and consulting firm with a strong emphasis on AI, software development, and digital transformation. It stakes a position as a custom voice agent development agency by offering AI voice and agent development among its core services, allowing clients to build conversational interfaces integrated with backend systems, analytics, and domain logic. Their approach combines emerging technologies (LLMs, generative AI, NLP) with robust application architectures to deliver scalable, production-ready voice or conversational systems.
The company supports clients across multiple geographies and verticals, operating with an offshore model supplemented by global presence. Prismetric brings end-to-end execution, from strategy and prototyping to deployment and maintenance, often working with startups and mid-sized enterprises seeking to add voice or AI augmentation to their products.
Services and expertise: AI development, generative AI, data engineering, ML, AI consulting, chatbots, AI voice agent development, LLM & NLP services, web & mobile app development, software & platform engineering
Location: headquartered in Gandhinagar, Gujarat, India, with offices in USA and other regions
Intellectyx is a technology consulting and development firm that specializes in data, AI, and digital transformation services. With growing emphasis on AI agents and conversational systems, they are exploring and increasingly adopting interfaces such as ElevenLabs voice technology for advanced voice synthesis in their AI agent deployments. Their work often bridges AI modeling, data pipelines, and system integration, allowing voice agents to act on insights derived from enterprise data.
Besides AI and voice, Intellectyx delivers full-stack digital services, cloud architecture, enterprise applications, and modernization. Their model includes both strategy and execution, enabling clients to not only conceive intelligent agents but also operationalize them in production settings, often within larger transformation programs.
Services and expertise: data management & engineering, business intelligence & analytics, generative AI & AI agent development, natural language processing, digital/cloud transformation, enterprise/product engineering, system integration & workflow automation
Location: headquarters in Denver, CO, USA (with offshore / global delivery)
Team size: up to 200 experts
Portfolio: DQLabs, Arria, Helix AI, Church Community Builder, HunterLab, People Element, ComplyKey
What An ElevenLabs And Twilio Voice Agent Deployment Includes
In a typical setup, Twilio handles the phone numbers and call connection, ElevenLabs provides the voice, and a language model decides what the agent says and does. A deployment usually covers:
This list mixes development teams with platform vendors, so decide first whether you want a custom build or a platform your team configures.
Ask for live phone demos you can call, not just recordings.
Check experience with your call type, such as appointment booking, support or outbound sales.
Confirm which CRM and business systems they have integrated before.
Ask how they handle call recording consent, data retention and security.
Agree on how usage costs for Twilio, ElevenLabs and the language model are passed through.
Frequently Asked Questions
How do ElevenLabs and Twilio work together for voice agents?
Twilio connects the agent to the phone network, handling numbers, inbound and outbound calls and audio streaming. Speech is transcribed, a language model decides the response and ElevenLabs turns that response into a natural-sounding voice played back on the call. ElevenLabs also offers its own conversational agent tools that can connect to Twilio numbers.
How much does it cost to deploy an AI voice agent?
Cost has two parts: the build and the usage. The build depends on conversation complexity, integrations and testing, while usage includes per-minute telephony, voice generation and language model charges. Ask partners for an estimate based on your expected call volume and average call length.
Can an AI voice agent connect to a CRM?
Yes. Voice agents can be connected to CRMs such as Salesforce or HubSpot through APIs to look up callers, log calls, create leads, update records and book meetings. Integration is usually a core part of a deployment, so ask partners which CRMs they have worked with.
As voice technology continues to reshape customer experiences, businesses need partners who can bridge advanced speech synthesis with scalable communication platforms. The top ElevenLabs voice API deployment companies stand out by combining technical expertise with practical use cases, helping brands launch voice agents that sound natural, scale seamlessly, and deliver measurable results.
If you want to feature your ElevenLabs and Twilio for Voice-Agent Deployment company on this list, email us or submit a form in the Top Choices section. After a thorough assessment, we’ll decide whether it’s a valuable addition.
