Vocode
Vocode provides an open-source Python library and hosted telephony API for building voice-based LLM agents. It abstracts speech-to-text, text-to-speech, and LLM providers, enabling developers to deploy voice applications across telephony, web, and Zoom.
- Company typePrivate
- Founded2023
- HeadquartersSan Francisco, United States
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What Vocode does
Vocode is a developer infrastructure company that provides an open-source library and a hosted telephony API for building voice-based AI agents. Founded in 2023 and headquartered in San Francisco, the company abstracts the complexity of real-time voice conversation orchestration across speech-to-text, text-to-speech, and LLM providers, supporting deployment across telephony (Twilio/Vonage), web (WebRTC via LiveKit), and Zoom. Its core product combines a Python library (vocode-python on GitHub) with a hosted cloud service accessible via REST API and Python and Node.js SDKs. Enterprise features include HIPAA compliance (beta), Bring Your Own Telephony, Bring Your Own OpenAI API keys, and custom voice cloning on request. The company also supports a fully local offline mode using open-source models (Whisper.cpp, GPT4All, Llama.cpp, Coqui TTS) optimized for Apple Silicon.
The platform is provider-agnostic across the leading AI stack: Deepgram for STT (with Nova-2 multilingual support across 35+ languages), ElevenLabs, Play.ht, Rime, and Azure for TTS, and OpenAI, Anthropic, LangChain, GPT4All, and Llama.cpp for LLMs, allowing customers to switch providers without code changes. Beta feature layers include Pinecone-powered vector database knowledge retrieval (RAG), multilingual agents in English/Spanish/German, IVR phone-tree navigation via DTMF, warm transfer to human agents, runtime context injection via a configurable context endpoint, and JSON-Schema-defined external API actions during calls. Webhooks, call recordings, transcripts, answering-machine detection, and Do Not Call analysis round out the production-grade call automation surface.
Vocode operates a hybrid go-to-market: API-first self-service for individual developers (free and Developer tiers) layered on top of community-led open-source distribution via GitHub, Discord, Twitter, and a Mintlify-hosted documentation site, supplemented by enterprise direct sales for HIPAA, BYOT, and BYO-LLM deployments under annual contracts. Revenue is generated through subscription tiers on the hosted telephony API; specific pricing is not publicly disclosed. The company has raised approximately $3.75M total, comprising a $500K pre-seed in April 2023 led by Y Combinator with Liquid 2 Ventures, and a $3.25M seed in February 2024 with participation from Accel, Base10 Partners, Google Ventures, Gradient, Liquid 2 Ventures, and Y Combinator. Co-founders Ajay Raj and Kian Hooshmand lead a team of 1-10 employees.
Vocode firmographics
Firmographics- Name
- Vocode
- Website
- https://docs.vocode.dev/
- Company type
- Private
- Founded year
- 2023
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Vocode provides an open-source Python library and hosted telephony API for building voice-based LLM agents. It abstracts speech-to-text, text-to-speech, and LLM providers, enabling developers to deploy voice applications across telephony, web, and Zoom.
- Ownership category
- akta.pro rank
Vocode industry classification
Industry- Product category
- Conversational AI / Voice Agent Platform
- NAICS
- Telephone Call Centers (56142), Telephone Answering Services (561421)
- SIC
- Services-Prepackaged Software (7372), Communications Services, Nec (4899), Telephone Communications (No Radiotelephone) (4813)
- akta.pro primary industry
- Cloud PBX & Hosted Telephony (HDAIAHAB)
- akta.pro secondary industries
- Voice Calling (VoIP) Apps (BPAMACAC), VoIP Access & ITSP Services (HDAIAHAD), Multilingual/Translation Communication Apps (BPAMACAJ)
Keywords
Where Vocode is headquartered
LocationHeadquarters
- HQ city
- San Francisco
- HQ country
- United States
- HQ region
- North America
Markets served
Vocode business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations
Revenue model
- Hosted Telephony API (SaaS): Vocode offers a hosted API service that automates inbound and outbound phone calls. Users pay for access to the managed telephony infrastructure, including phone numbers, call routing, agent orchestration, and compliance features. The hosted service is accessible via REST API and Python/Node SDKs. Pricing includes a Free plan, a Developer plan, and an Enterprise plan with custom BYOT and BYO-LLM capabilities.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Free plan available with basic access to the Vocode API and open-source library. |
| Subscription | Monthly | Developer plan with higher usage limits and API access. |
| Subscription | Annual | Enterprise plan with bring-your-own-telephony and bring-your-own-OpenAI-API-keys capabilities. |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels6 records
Vocode product offering
Product offeringCore offering
Vocode provides an open-source Python library and a hosted REST API for building real-time, voice-based LLM agents that can make and receive phone calls, operate on the web, and join Zoom meetings. The platform abstracts speech-to-text, text-to-speech, and LLM providers behind a unified developer API with cross-platform orchestration. A hosted telephony service is sold alongside the free open-source library, with enterprise features including HIPAA compliance, Bring Your Own Telephony (Twilio), and Bring Your Own OpenAI API keys.
Product overview
Vocode is an open-source library and hosted API platform for building voice AI agents. The core product combines an open-source Python library (free self-hosted option) with a cloud-hosted telephony API service. The platform integrates speech-to-text (Deepgram) and text-to-speech (ElevenLabs, Play.ht, Rime, Azure) providers, supports OpenAI LLM-powered agents, and enables cross-platform voice applications (telephony via Twilio/Vonage, web, Zoom). SDKs are available in Python and Node.js. Enterprise features include HIPAA compliance, Bring Your Own Telephony (Twilio), Bring Your Own OpenAI API Keys, and custom voice cloning. Beta features include vector database knowledge retrieval (Pinecone), multilingual bots, IVR navigation, warm transfers, context injection, and external actions integration.
Differentiator
Problem solved
Functional benefit
Products and services
- Vocode Hosted Telephony API
- Vocode Open Source Library
- Python SDK (vocode-api)
- Node SDK (@vocode/vocode-api)
Quantifiable outcome
- Run a fully local voice agent without internet using open-source models (Whisper.cpp, GPT4All/Llama.cpp, Coqui TTS) optimized for Apple Silicon.
- +2 more outcomes
Companies that use Vocode
Customer profileSegments2 records
Ideal customer profiles2 records
Vocode technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration13 records
AI capability7 records
Feature21 records
Vocode partnerships and signals
Strategic signalPartnerships
15 partnerships are on record, tiered core and secondary.
- TwiliocoreTwilio serves as the primary telephony provider for Vocode's hosted API and BYO Telephony enterprise feature. Vocode integrates with Twilio for buying/linking phone numbers, making and receiving calls, and storing call recordings. Enterprise customers can connect their own Twilio accounts, and the warm transfer feature requires a Twilio steering pool configuration.
- OpenAIcoreOpenAI GPT models (GPT-3.5-turbo, GPT-4, and fine-tuned variants) serve as the primary LLM for Vocode agents. Vocode treats OpenAI function calling as a first-class standard. Enterprise customers can bring their own OpenAI API keys and use custom fine-tuned models.
- DeepgramcoreDeepgram is the default speech-to-text (STT) provider for Vocode, used for real-time transcription in conversations. Vocode exposes Deepgram-specific configuration including endpointing, utterance cutoff, Nova and Nova-2 models, and keyword boosting. Deepgram Nova-2 supports over 35 languages.
- ElevenLabscoreElevenLabs serves as a primary text-to-speech (TTS) provider for Vocode agents. Vocode supports ElevenLabs multilingual voices and exposes ElevenLabs-specific parameters including stability, similarity_boost, model_id, and streaming latency optimization.
- Play.htsecondaryPlay.ht is listed as a supported TTS provider for Vocode agents. Integration enables access to Play.ht's voice library with configurable voice IDs and versions.
- RimesecondaryRime is listed as a supported TTS provider for Vocode agents. Integration provides access to Rime's voice models with configurable speaker and model ID parameters.
- Azure (Microsoft)coreAzure Cognitive Services speech synthesis is a supported TTS provider for Vocode, with the AzureSynthesizer as the default synthesizer. Azure supports over 75 voices across 45+ languages. Azure TTS is also used in LangChain agent examples and fully local conversation guides.
- PineconesecondaryPinecone is the supported vector database provider for Vocode's beta vector database feature, enabling agents to query knowledge bases beyond LLM context windows. Documents are stored in Pinecone with text and source metadata for retrieval-augmented generation.
- Whisper.cppsecondaryWhisper.cpp (by Georgi Gerganov) is supported as an open-source speech-to-text option for fully local conversations, enabling offline voice agent operation without internet connectivity.
- GPT4AllsecondaryGPT4All is supported as an open-source LLM option for fully local voice agent conversations, enabling offline operation on CPU/GPU without internet connectivity.
- Llama.cppsecondaryLlama.cpp is supported as an open-source LLM option for fully local conversations, enabling use of models like LLaMA, Alpaca, Vicuna, Koala, and WizardLM without internet connectivity.
- Coqui TTSsecondaryCoqui TTS is supported as an open-source text-to-speech option for fully local voice agent conversations, enabling offline synthesis (e.g., Tacotron2 models) without internet connectivity.
- LangChainsecondaryVocode provides a LangChain agent integration allowing LangChain agents to make autonomous phone calls as a tool. LangChain is also used internally for document loading into Pinecone vector databases.
- SentrysecondaryVocode offers a beta Sentry integration for error tracking and performance monitoring, capturing custom spans for conversation latency, LLM performance, and synthesizer metrics. Developers can instrument their voice agent applications with Sentry SDK.
- MintlifysecondaryVocode's developer documentation is built and hosted on Mintlify, a developer documentation platform, providing the technical content infrastructure for the docs.vocode.dev site.
Scale indicators3 records
Recent moves6 records
Expansion highlights6 records
Vocode competitors and assessment
Company assessmentDirect peers
- Synthflow AI: Synthflow AI offers a no-code/developer voice AI agent platform for enterprise call automation. It is comparable to Vocode's enterprise tier, targeting similar use cases (inbound receptionists, outbound sales bots, appointment scheduling) with telephony integration.
- Air AI: Air AI provides conversational voice AI agents for sales and customer service calls with extended-duration autonomous conversations. It competes with Vocode in the hosted AI voice agent market, focusing on long-form outbound conversations.
- Retell AI: Retell AI provides a voice AI agent platform with telephony integration, real-time conversation orchestration, and LLM-powered agents. It directly competes with Vocode in the developer-focused voice agent infrastructure layer with comparable BYO-LLM and STT/TTS provider flexibility.
- Voiceflow: Voiceflow is a conversation design and voice AI platform for building voice agents and chatbots across telephony and other channels. It overlaps with Vocode in cross-platform voice deployment, though Voiceflow emphasizes visual design while Vocode emphasizes a developer library/API approach.
- Bland AI: Bland AI is an enterprise-focused voice AI platform for automating inbound and outbound phone calls using LLMs. It competes with Vocode's hosted telephony API in the same enterprise call automation use cases, with comparable STT/TTS/LLM provider integrations.
- Vapi: Vapi is a voice AI agent platform for developers offering hosted telephony APIs and conversation orchestration. It is the closest direct competitor to Vocode, targeting the same developer-first GTM with similar LLM-powered voice agent capabilities and Twilio integration.
- Play.ai: Play.ai offers a voice AI platform combining TTS, voice cloning, and conversational agents. It overlaps with Vocode in the developer-facing voice agent infrastructure category and shares ElevenLabs-style TTS provider partnerships.
Broad incumbents
- Twilio: Twilio is Vocode's primary telephony partner and the underlying CPaaS provider. Twilio's broader portfolio (including Twilio Voice AI, Flex, and ConversationRelay) represents both a partnership dependency and a long-term competitive threat as it builds voice agent capabilities into its core platform.
- Deepgram: Deepgram is a speech-to-text provider that serves as Vocode's default STT partner. While not a direct competitor in agent orchestration, Deepgram is expanding into voice AI agent offerings that could overlap with Vocode's hosted telephony API from the speech-recognition layer.
Emerging players
- LiveKit: LiveKit is a real-time WebRTC infrastructure platform that Vocode integrates with for browser-based voice agents. LiveKit is emerging as a voice agent platform itself with its Agents framework, making it both a partner and an emerging adjacent competitor.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat3 records
Key risks5 records
Key highlights7 records
Customer concentration
Vocode social profiles
Digital presenceVocode compliance and trust
Trust signalCompliance1 record
Vocode financial estimates
Financial estimateRevenue estimate
Valuation estimate
Vocode leadership team
Management profileNumber of profiles
Profiles2 records
Vocode funding detail
Funding detailFunding overview
Funding rounds2 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Vocode M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Vocode
What does Vocode do?
Vocode provides an open-source Python library and a hosted REST API for building real-time, voice-based LLM agents that can make and receive phone calls, operate on the web, and join Zoom meetings. The platform abstracts speech-to-text, text-to-speech, and LLM providers behind a unified developer API with cross-platform orchestration. A hosted telephony service is sold alongside the free open-source library, with enterprise features including HIPAA compliance, Bring Your Own Telephony (Twilio), and Bring Your Own OpenAI API keys.
Is Vocode a public or private company?
Vocode is a private company. It is classified as venture growth investor backed and is currently operating.
When was Vocode founded?
Vocode was founded in 2023. It employs 1 to 10 people.
Where is Vocode based?
Vocode is headquartered in San Francisco, United States, in the North America region.
How does Vocode make money?
One revenue line is on record: hosted Telephony API (SaaS).
Who are Vocode's main competitors?
Direct peers on record are Synthflow AI, Air AI, Retell AI, Voiceflow, Bland AI, Vapi and Play.ai. Broad incumbents are Twilio and Deepgram. LiveKit is listed as an emerging player.
Does Vocode have an API?
Yes. Vocode provides a REST API for automating inbound and outbound phone calls via agents. The API supports telephony operations (numbers, calls, recordings), agent management (prompts, voices, actions), account connections (Twilio, OpenAI), webhooks for event subscriptions, and vector databases for knowledge retrieval. Available via Python SDK (vocode-api package) and Node SDK (@vocode/vocode-api), with enterprise features including Bring Your Own Telephony (Twilio) and Bring Your Own OpenAI API Keys. Developer documentation is at docs.vocode.dev/api-reference.
What industry is Vocode in?
Vocode's product category is Conversational AI / Voice Agent Platform. Its primary akta.pro industry code is HDAIAHAB, Cloud PBX & Hosted Telephony, with a secondary code of BPAMACAC, Voice Calling (VoIP) Apps. Its NAICS code is 56142 and its SIC code is 7372.