Top Companies In Custom Voice Agent Development With ElevenLabs
Daria Pohrebniak
Marketing Director - Reverb
09.02.2026
A voice agent is only “good” when it survives real calls, edge cases, and messy customer moods — which is why shortlists of top companies in custom voice agent development with ElevenLabs matter.
Strong teams connect the agent to your systems, manage latency and handoffs, and treat monitoring as part of the build. Done right, support load drops and humans spend time on problems that actually need judgment.
The market is crowded, but patterns show up quickly. Some custom voice agent development companies excel at contact-center scale, where routing and QA matter as much as the voice. Others focus on product craft, where conversation design and integrations decide whether users trust the experience. The list below sticks to providers with clear strengths and real proof.
Best Companies In Custom Voice Agent Development With ElevenLabs For Production Use
Impekable pairs strong product instincts with solid engineering, so the voice sounds human and the experience doesn’t break when real customers start calling. As an official ElevenLabs expert partner, the team often comes in after a demo phase and turns it into something stable enough for daily use. The focus stays on how the agent fits into the product, not on memorized lines.
Work usually starts by mapping the system and shaping the conversation flows, then shifts into orchestration and hands-on integrations with CRMs, contact center platforms, and telephony. Once it’s live, the team keeps tightening prompts, fixing rough edges, and watching real production behavior as call volume and user patterns change. The result isn’t a one-off assistant, but something built to get better month after month.
Services and expertise: Voice assistant design and deployment, conversation flows, orchestration, prompt work, CRM and telephony integrations
Humach brings decades of contact center experience, which makes a difference when voice AI has to match service standards and compliance rules. The company integrates ElevenLabs voice agents into its outsourcing offering, aiming for natural voice interactions that still follow operational guardrails. Their model supports multilingual service and blends AI with human coverage, so teams can scale without gambling on fully automated support.
Implementation tends to focus on practical outcomes: routine inquiries move to AI, live agents get “digital agent” support, and analytics track sentiment and quality. For businesses that want voice AI inside an established service operation, Humach’s approach reduces the gap between a voice demo and day-to-day support reality. It’s a strong fit when you need voice automation plus disciplined call-center execution.
Services and expertise: Contact center outsourcing, omnichannel support, AI voice agents, digital agent assistance, analytics and CX strategy
Location: Dallas, Texas
Team size: 356 experts
Portfolio: Voice agents and omnichannel support across healthcare, travel, e commerce, and government
Prismetric approaches voice agents as software products, with a clear focus on replacing brittle IVR trees with conversations that scale. The team covers strategy, design, development, and integration, then adds analytics so improvements are based on what callers actually do. Their global footprint supports projects that span regions and languages, which matters when a voice system is rolled out across markets.
They also handle modernization work: migrating legacy call flows, integrating pre-built agents, and connecting voice to business systems so calls don’t end in dead ends. This is where custom voice agent development companies earn trust — tight integration and reliable reporting matter as much as voice quality. Prismetric’s breadth makes sense for teams that want one vendor for build, integration, and long-term iteration.
Services and expertise: AI voice agent strategy, VUI design, NLP training, system integration, multilingual builds, analytics and support
Location: Gandhinagar, India; offices in the USA and Saudi Arabia
Team size: 90 experts
Portfolio: AI contact center solutions, custom voice agents, mobile and enterprise software across retail, healthcare, logistics
Aigentora is narrowly focused on voice receptionists for travel, events, and hospitality, where missed calls quickly become lost revenue. Their agents aim to handle high volumes of routine inquiries — availability, confirmations, cancellations — while integrating with booking systems and APIs. The emphasis is quick deployment and multilingual coverage so businesses can extend service hours without staffing around the clock.
Case studies highlight strong call-handling rates and reduced missed bookings, especially for tour operators trying to serve international customers. Because the company stays close to specific use cases, the flows tend to be practical and conversion-aware rather than overly generic. If your problem looks like “phones ring nonstop and staff can’t keep up,” Aigentora’s specialization is the point.
Services and expertise: AI receptionist voice agents, multilingual call automation, booking integration, rapid rollout for travel and hospitality
Location: Ahmedabad, India
Team size: 12 experts
Portfolio: DayTours4U and similar deployments for tour operators, clinics, salons, entertainment venues
Rain Infotech builds voice agents that aim to cover full conversations, intent recognition, and multilingual support, with options like biometric voice authentication and configurable “personalities.” The company also positions its work around integration, especially with CRMs and call-center systems, so the voice agent can do more than answer FAQs. For businesses trying to reduce call volume while keeping access open 24/7, that combination is appealing.
Their broader background across blockchain, mobile apps, and custom software shows up in how they frame security and system design. The portfolio spans multiple sectors, which can help when your voice agent needs industry-specific flows, data handling rules, or audit trails. Used well, this kind of build becomes a front door to your systems, not a standalone chatbot with a voice.
Services and expertise: AI voice agents, intent detection, multilingual support, biometric voice authentication, CRM and call-center integrations
Location: Surat, India
Team size: 50 experts
Portfolio: Projects across finance, healthcare, supply chain, real estate, education, government
Quytech leans into voice analysis and speech analytics, which is valuable when you want to measure what happens in calls instead of guessing. Their platforms focus on turning phone interactions into structured data using ASR, NLP, and emotion detection, then pushing insights into QA and performance workflows. That can replace manual scoring and make coaching more consistent.
They also build voice agent solutions for enterprises, with consulting and integration work that connects analytics to existing customer service systems. If your priority is accuracy and insight — not just automation — Quytech’s angle makes sense. The company cites high speech-to-text accuracy and a history of delivering voice and AI projects across industries.
Services and expertise: Voice analysis platforms, AI voice agents, speech analytics engines, consulting, system integration and support
Location: India; USA offices (cities not specified)
Team size: 250 experts
Portfolio: AI and voice solutions for enterprise clients including HP, Birlasoft, Petrofac, Exxon Mobil
AtDrive Group positions itself as an AI integration partner, with a menu that includes voice agents and voice cloning through the ElevenLabs API. The technical scope is broader than voice alone: RAG pipelines, ASR, model fine-tuning, and chatbot builds that share infrastructure with voice experiences. That’s helpful when your voice agent needs to pull accurate answers from internal data instead of improvising.
Their delivery model looks like outsourced product development, with centers in Noida and Hyderabad and additional presence outside India. This is a practical option for teams that want to prototype quickly, then harden the system over time while keeping engineering in one place. For buyers comparing top companies in custom voice agent development with ElevenLabs, AtDrive stands out for voice cloning and integration-heavy builds.
Services and expertise: Voice agents with ElevenLabs voice cloning, RAG, model fine-tuning, AI chatbots, automation and consulting
Location: Noida and Hyderabad, India; presence in the British Virgin Islands
Team size: 51 experts
Portfolio: AI chatbots and voice agents across finance, e commerce, and healthcare
Sentry Digital Services focuses on voice generation and audio workflows using ElevenLabs, which suits teams that need consistent voice output across channels. Instead of treating voice as a one-off asset, they frame it as a repeatable pipeline: strategy, design, integration, optimization, and maintenance. That’s a good match for organizations producing multilingual audio or automating voice interactions at scale.
They also support broader digital work, which can help when voice needs to slot into e commerce and content systems without friction. If you’re evaluating best custom voice agent development services, Sentry’s strength is process: how voice work gets built, reused, and maintained without quality drifting over time. It’s a sensible pick when the voice output is part of a larger production operation.
Services and expertise: ElevenLabs voice workflow strategy, voice agent design and integration, optimization, maintenance, consulting
Location: London, United Kingdom
Team size: 200 experts
Portfolio: Voice generation workflows for content, e commerce, and multilingual audio production
BigRio brings a healthcare-first angle, building AI voice agents designed for HIPAA-conscious workflows like patient scheduling and front-desk support. The value here is the combination of machine learning, data engineering, and systems integration, especially when voice needs to connect to EHRs and CRMs. In healthcare settings, reliability and data handling aren’t “nice to have” — they’re the job.
Their services cover design through deployment and ongoing optimization, which is key when call patterns shift and scripts need revision. The portfolio includes voice agent projects for providers and insurers, plus broader analytics and ML work that supports long-term improvement. If your environment is regulated and complex, BigRio’s focus can reduce risk while still moving fast.
Services and expertise: Healthcare voice agents, ML and data engineering, custom software, EHR and CRM integrations, end-to-end support
Location: Cambridge, Massachusetts, USA
Team size: 25 experts
Portfolio: Voice agents for healthcare providers and insurers; data analytics for pharma; ML systems across industries
Sparkout Tech maps the build in plain stages — capture the caller’s voice, convert it to text, interpret intent, choose the next action, then speak back with text-to-speech. That same workflow is designed to run across mobile, web, and smart speakers, so you’re not rebuilding the agent for every channel. Their published hiring timeline shows steady team growth, which helps when a project needs ongoing attention after go-live.
They cover design through rollout, with analytics and maintenance included so performance stays stable over time. Projects span support, healthcare, retail, banking, travel, and education, which keeps the playbook grounded across call types. Among custom voice agent development companies, Sparkout stands out for explaining the process and sticking with post-launch iteration.
Services and expertise: Voice agent design, ASR and NLP, workflow automation, analytics, multichannel integration, support and maintenance
Location: Coimbatore, India; Dover, Delaware, USA
Team size: 70 experts
Portfolio: AI voice agents, blockchain apps, and custom software across travel, fintech, healthcare, supply chain, education
Picking A Partner That Won’t Stall After Launch
The right partner doesn’t just ship a “talking bot.” They test edge cases, build integrations that don’t break when systems change, and treat monitoring as a first-class feature — because that’s what keeps the agent useful month after month. If you’re comparing best companies in custom voice agent development with ElevenLabs, look for teams that can show how they handle handoffs, latency, fallback paths, and ongoing tuning.
Also pay attention to fit. A contact-center operator may be perfect for volume and governance, while a product agency may be better when the agent sits inside a complex user flow. When your goals are clear and responsibilities are explicit, it’s easier to choose from top companies in custom voice agent development with ElevenLabs and get a rollout that feels steady instead of experimental.
If you want to feature your custom voice agent development with ElevenLabs agency 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.
