Retell AI
Phone-first voice agent platform; SIP/custom telephony; strong testing/monitoring.
Voice AI Platform Intelligence • 150+ Systems Mapped
Voice AI Platforms, Frameworks and Infrastructure for Production AI Systems
Peak Demand maps the Voice AI market across full-stack agent platforms, enterprise systems, realtime frameworks, telephony, speech infrastructure and vertical products so companies can choose technology around the workflow instead of around a vendor pitch.
The directory below tracks 150+ systems and continues expanding as legitimate deployable Voice AI technologies are verified. Individual technical profiles are published only after first-party research and review, while the Agency layer explains how those technologies fit into real implementation architecture.
150+ systems mappedPlatforms, frameworks, speech, telephony and vertical technologies.
Vendor-neutral selectionThe stack is chosen around workflow, risk, integrations and operating requirements.
First-party researchTechnical profiles are grounded in official vendor documentation before publication.
Managed implementationSelection connects to integration, QA, deployment, monitoring and optimization.
Voice AI Platform Selection
What Is a Voice AI Platform — and Why Does the Category Include More Than Agent Builders?
A production Voice AI system can span telephony, realtime audio, speech recognition, models, agent orchestration, tool use, business logic, integrations, observability and human escalation. Some vendors package most of that stack. Others provide one critical layer.
That is why Peak Demand maps the technology market by role and layer rather than pretending every product is directly interchangeable.
Is there one best platform?No. The right choice changes with latency, telephony, integrations, compliance, model control, workflow complexity and support requirements.
Are components included?Yes. Speech providers, telephony infrastructure and realtime frameworks belong when they can realistically be selected as part of a Voice AI architecture.
Why are profiles still coming soon?The complete market map can exist now while individual pages stay unpublished until the research and technical review are strong enough.
Voice AI Technology Stack
A Voice Agent Is Usually a System of Connected Layers
The visible conversation is only the front end. Production quality depends on the infrastructure underneath it and the business systems it can safely reach.
Call / ChannelPhone, SIP, browser, app or contact centre.
TelephonyNumbers, routing, SIP, media and carrier connectivity.
SpeechSTT, TTS, turn-taking and realtime audio handling.
Agent LayerPrompting, models, memory, tools and orchestration.
Business LogicRules, validation, permissions and exceptions.
SystemsCRM, EMR, calendars, ERP, ticketing and APIs.
OperationsQA, logs, analytics, fallbacks and human handoff.
Platform Families
Understand the Market by Technology Role, Not by a Logo Wall
The directory is organized into families that reflect how the technology is actually used in implementation architecture.
12
Full-Stack Voice AI Platforms
End-to-end platforms combining agent orchestration, telephony, speech, tool use and production controls.
Explore family ↓19Developer Platforms, Frameworks & Builders
Programmable frameworks and infrastructure for teams that need deeper control over models, media and agent logic.
Explore family ↓42Enterprise Conversational AI & Contact Center
Enterprise platforms for customer-service automation, contact centres, governance and large-scale operations.
Explore family ↓03Realtime Voice Models & AI Infrastructure
Realtime model and inference layers used inside custom conversational voice systems.
Explore family ↓30Speech, STT & TTS Infrastructure
Speech recognition, synthesis and audio intelligence components that power larger Voice AI stacks.
Explore family ↓12Telephony, CPaaS & Realtime Media
Phone numbers, SIP, programmable calling, WebRTC and realtime media infrastructure around Voice AI.
Explore family ↓19AI Receptionist & SMB Platforms
Packaged receptionist and phone-agent products aimed at SMB, local and agency-managed deployments.
Explore family ↓14Canadian Voice AI Platforms
Canadian and Canada-focused Voice AI products tracked separately for regional fit and deployment options.
Explore family ↓18Vertical Voice AI Platforms
Purpose-built Voice AI systems for healthcare, dental, automotive, restaurants and other industry workflows.
Explore family ↓10Emerging & Specialized Voice AI Platforms
Long-tail, regional and emerging systems that remain relevant to a complete market map.
Explore family ↓Featured Platform ResearchDeveloper/full-stack Voice AI Developer/full-stack Voice AI No-code/full-stack Voice AI CRM-native Voice AI Realtime agent framework CPaaS + Voice AI
Start With the Systems Already in Peak Demand’s Technical Research Library
Published profiles go deeper into architecture, APIs, telephony, integrations, strengths, tradeoffs and implementation context. Additional profiles activate as the research conveyor completes review.
Vapi
Developer orchestration platform; swappable STT/LLM/TTS and telephony.
Synthflow AI
No-code/low-code voice agent builder with agency relevance.
HighLevel Voice AI
Inbound/outbound agents, workflows, appointments, KB, APIs/webhooks; high agency fit.
LiveKit Agents
Open-source agents framework + cloud + SIP.
Twilio Conversational AI / ConversationRelay
Telephony + ConversationRelay + agent connectivity.
Technical profile in researchOfficial site ↗
Technology Selection
We Choose the Stack Around the Job — Not the Other Way Around
Peak Demand is not tied to one Voice AI platform. Selection starts with the operating requirement, then works backward into the technology layers that can support it reliably.
- Inbound and outbound telephony requirements, SIP and carrier architecture.
- Realtime latency, interruption handling, STT and TTS quality.
- APIs, webhooks, function calling and external tool control.
- CRM, scheduling, EMR/EHR, ERP and proprietary-system integration.
- Security, data handling, compliance and deployment constraints.
- Testing, observability, call logs, analytics and production support.
- Pricing architecture, usage volume and long-term operational fit.
Complete Market Map
150+ Voice AI Platforms, Frameworks and Infrastructure Technologies
Search the full map or browse by technology family. Live Peak Demand profiles are crawlable links. Unpublished systems remain visible without fake or dead profile URLs.
179 / 179 systems shown
Platform Family 01
12 systemsFull-Stack Voice AI Platforms
End-to-end platforms combining agent orchestration, telephony, speech, tool use and production controls.
Platform Family 02
19 systemsDeveloper Platforms, Frameworks & Builders
Programmable frameworks and infrastructure for teams that need deeper control over models, media and agent logic.
Agora Conversational AIRealtime Voice AI infrastructure
Infrastructure/platform
Core choice
Profile coming soonOfficial ↗
Rasa Pro / RasaConversational AI framework
Framework/platform
Custom-stack choice
Profile coming soonOfficial ↗
VocodeOpen-source Voice AI framework
Framework
Custom-stack choice
Verification / research pendingOfficial ↗
BolnaOpen-source Voice AI framework
Framework/platform
Custom-stack choice
Profile coming soonOfficial ↗
TEN FrameworkOpen-source realtime AI framework
Framework
Custom-stack choice
Profile coming soonOfficial ↗
QuickVoiceOpen-source Voice AI app layer
Framework/app layer
Watch
Verification / research pendingOfficial URL under verification
Workforce WaveVoice AI infrastructure
Developer platform
Watch
Verification / research pendingOfficial ↗
Lindy PhoneAgent automation / Voice AI
Developer / workflow platform
Strong evaluate
Profile coming soonOfficial ↗
DograhOpen-source Voice AI platform
Developer / open source
Strong evaluate
Profile coming soonOfficial ↗
Platform Family 03
42 systemsEnterprise Conversational AI & Contact Center
Enterprise platforms for customer-service automation, contact centres, governance and large-scale operations.
Google Gemini Live / CX Agent StudioRealtime + enterprise conversational AI
Model/platform
Core component
Profile coming soonOfficial ↗
Amazon Connect AI agentsCloud contact center + Voice AI
CCaaS/platform
Enterprise choice
Profile coming soonOfficial ↗
Salesforce Agentforce VoiceCRM-native Voice AI
Enterprise platform
Enterprise choice
Profile coming soonOfficial ↗
CognigyEnterprise conversational AI
Enterprise platform
Enterprise choice
Profile coming soonOfficial ↗
Kore.aiEnterprise conversational AI
Enterprise platform
Enterprise choice
Profile coming soonOfficial ↗
SoundHound AI / AmeliaConversational Voice AI
Enterprise platform
Enterprise choice
Profile coming soonOfficial ↗
SierraCustomer experience AI agents
Enterprise platform
Enterprise choice
Profile coming soonOfficial ↗
Observe.AIContact-center AI / voice automation
Enterprise platform
Enterprise choice
Profile coming soonOfficial ↗
Genesys Cloud AIContact center + AI agents
CCaaS/platform
Enterprise choice
Profile coming soonOfficial ↗
NiCE CXone MpowerContact center + AI agents
CCaaS/platform
Enterprise choice
Profile coming soonOfficial ↗
Cisco Webex AI AgentContact center + Voice AI
CCaaS/platform
Enterprise choice
Profile coming soonOfficial ↗
Zoom Virtual Agent ReceptionistVoice AI receptionist/virtual agent
UCaaS/CCaaS
Strong choice
Profile coming soonOfficial ↗
Avaya Experience Platform AIContact center AI
CCaaS/platform
Enterprise choice
Profile coming soonOfficial ↗
ServiceNow AI Voice AgentsWorkflow-native Voice AI
Enterprise platform
Enterprise choice
Profile coming soonOfficial ↗
Convai OrationGoverned conversational Voice AI
Enterprise platform
Consider
Profile coming soonOfficial ↗
CloudTalk AI ReceptionistAI receptionist/contact center
UCaaS/CCaaS
SMB/midmarket choice
Profile coming soonOfficial ↗
GoTo Connect / Contact CenterBusiness communications AI
UCaaS/CCaaS
Consider
Profile coming soonOfficial ↗
Sprinklr ServiceConversational/service AI
CCaaS/platform
Enterprise choice
Profile coming soonOfficial ↗
Gnani.aiEnterprise Voice AI / speech stack
Enterprise platform
Strong evaluate
Profile coming soonOfficial ↗
Jio Haptik Voice AIEnterprise conversational AI
Enterprise platform
Strong evaluate
Profile coming soonOfficial ↗
Platform Family 04
3 systemsRealtime Voice Models & AI Infrastructure
Realtime model and inference layers used inside custom conversational voice systems.
Platform Family 05
30 systemsSpeech, STT & TTS Infrastructure
Speech recognition, synthesis and audio intelligence components that power larger Voice AI stacks.
Deepgram Voice Agent APIDeveloper Voice AI / speech
Full platform
Core choice
Profile coming soonOfficial ↗
OpenAI Realtime APIRealtime speech-to-speech model/API
Model/platform
Core component
Profile coming soonOfficial ↗
xAI Grok Voice AgentRealtime speech-to-speech
Model/platform
Core component
Profile coming soonOfficial ↗
NVIDIA Riva / PersonaPlexSpeech + realtime voice
Speech/model infra
Enterprise component
Profile coming soonOfficial ↗
PlayHT / PlayAITTS / former agent platform
Speech/platform
Watch
Verification / research pendingOfficial ↗
Smallest.aiRealtime speech / voice agents
Speech component/platform
Consider
Profile coming soonOfficial ↗
Sarvam AIIndic speech + realtime AI
Speech/model platform
Regional component
Profile coming soonOfficial ↗
Mistral VoxtralSpeech understanding/STT
Speech/model component
Watch
Verification / research pendingOfficial ↗
Platform Family 06
12 systemsTelephony, CPaaS & Realtime Media
Phone numbers, SIP, programmable calling, WebRTC and realtime media infrastructure around Voice AI.
Twilio Conversational AI / ConversationRelayCPaaS + Voice AI
Infrastructure/platform
Core choice
Profile coming soonOfficial ↗
VoximplantProgrammable voice + AI
Telephony/platform
Infrastructure choice
Profile coming soonOfficial ↗
Platform Family 07
19 systemsAI Receptionist & SMB Platforms
Packaged receptionist and phone-agent products aimed at SMB, local and agency-managed deployments.
AgentPhoneAI phone agents
Platform
Watch
Verification / research pendingOfficial URL under verification
ThunderPhoneAI phone agents
Platform
Watch
Verification / research pendingOfficial URL under verification
Platform Family 08
14 systemsCanadian Voice AI Platforms
Canadian and Canada-focused Voice AI products tracked separately for regional fit and deployment options.
BookAIAI receptionist/booking
Canadian SMB platform
Canada choice
Verification / research pendingOfficial URL under verification
Voxa AgentsAI receptionist/agent builder
Canadian emerging platform
Watch
Verification / research pendingOfficial URL under verification
Nelvox Nova AICanadian bilingual AI receptionist
Canadian Voice AI
Evaluate
Profile coming soonOfficial ↗
Platform Family 09
18 systemsVertical Voice AI Platforms
Purpose-built Voice AI systems for healthcare, dental, automotive, restaurants and other industry workflows.
Slang AIRestaurant/hospitality Voice AI
Vertical platform
Vertical choice
Profile coming soonOfficial ↗
Smith.ai AI ReceptionistAI receptionist
SMB/vertical platform
SMB/legal choice
Profile coming soonOfficial ↗
Skit.aiVoice AI collections/contact center
Vertical/enterprise
Vertical choice
Profile coming soonOfficial ↗
InfinitusHealthcare voice automation
Healthcare platform
Healthcare choice
Profile coming soonOfficial ↗
Hippocratic AIHealthcare generative AI agents
Healthcare platform
Healthcare choice
Profile coming soonOfficial ↗
SuperDialHealthcare phone automation
Healthcare platform
Healthcare choice
Profile coming soonOfficial ↗
Stella Automotive AIAutomotive Voice AI
Automotive platform
Vertical choice
Profile coming soonOfficial ↗
SoundHound Smart OrderingRestaurant Voice AI
Restaurant platform
Vertical choice
Profile coming soonOfficial ↗
HappyRobotSupply-chain AI workers with voice
Vertical AI platform
Evaluate
Profile coming soonOfficial ↗
Platform Family 10
10 systemsEmerging & Specialized Voice AI Platforms
Long-tail, regional and emerging systems that remain relevant to a complete market map.
Vonage AI StudioConversational AI / voice
CPaaS/platform
Strong component
Profile coming soonOfficial ↗
Rapida AIVoice AI agents
Platform
Watch
Verification / research pendingOfficial URL under verification
Talkover AIVoice AI agents
Platform
Watch
Verification / research pendingOfficial URL under verification
EqhoVoice AI agents
Platform
Watch
Verification / research pendingOfficial URL under verification
Managed Voice AI Implementation
Choosing the Platform Is Only One Part of Getting Voice AI Into Production
A good technology choice can still fail if the business rules, integrations, QA, fallback logic and production operations around it are weak.
Platform Selection
Match technology to workflow, constraints, systems and operating requirements.
Architecture
Define telephony, models, speech, tools, data flow and systems of record.
Integration
Connect approved APIs, webhooks, calendars, CRM, industry systems and workflows.
QA + Launch
Test ordinary calls, edge cases, failed states, transfers, writes and escalation.
Managed Operations
Monitor production behaviour, logs, outcomes, changes and ongoing optimization.
Voice AI Platform FAQ
Questions Companies Ask Before Selecting a Voice AI Stack
What is a Voice AI platform?
A Voice AI platform is software or infrastructure used to build, run or support conversational voice systems. Depending on the product, that can include telephony, realtime audio, speech recognition, speech synthesis, agent orchestration, tool use, integrations, testing and observability.
What is the best Voice AI platform?
There is no universal best platform. The right choice depends on the workflow, telephony requirements, latency, integrations, model control, compliance requirements, deployment model, observability, pricing and operational support.
Does Peak Demand implement multiple platforms?
Yes. Peak Demand evaluates and implements technology according to the business workflow rather than forcing every deployment onto a single Voice AI vendor.
Why are some profiles marked coming soon?
Peak Demand maps the complete market while publishing individual technical profiles only after research and review. Unlinked entries remain in the directory so the market map is complete without creating dead profile links.
Are speech and telephony technologies included?
Yes. A production Voice AI architecture can depend on speech recognition, text-to-speech, realtime media, phone numbers, SIP and programmable telephony, so those technologies are part of the selection universe when they can realistically be used in a deployment.
Build the Right Voice AI Stack
Bring the Workflow. Peak Demand Can Help Select and Implement the Technology Behind It.
Platform selection should come after the operating problem is understood. Peak Demand can evaluate the voice stack, integration requirements, business rules, data flows, QA and ongoing operations needed to turn a platform choice into a production system.