AI Providers
The core AI models that power speech, language, and voice synthesis in your agents.
Large Language Models
The brain of your voice agent. Understands caller intent and generates responses.
Anthropic
Anthropic Claude writes your Bolna voice agent's replies. Use claude-sonnet-5 for most agents, or claude-haiku-4-5 for faster, high-volume calls.
Azure OpenAI
Azure OpenAI runs GPT models for your Bolna voice agent inside your own Azure account, for teams that need regional data residency and private networking.
DeepSeek
DeepSeek V4 runs the conversation in a Bolna voice agent at low cost per token. deepseek-v4-flash suits high-volume calls, with a 1M token context window.
Google Gemini
Google Gemini runs the conversation in a Bolna voice agent with a 1M token context and strong multilingual skills. gemini-2.5-flash is the recommended default.
OpenAI
OpenAI GPT models write your Bolna voice agent's replies. gpt-5.4-mini is the recommended default, with fast first tokens, function calling and low cost.
OpenRouter
OpenRouter gives a Bolna voice agent one API key for models from OpenAI, Anthropic, Google, Mistral, Meta and more. Pick a model and switch any time.
Perplexity
Perplexity can be the LLM behind a Bolna voice agent. Set the provider to perplexity in the agent config and Bolna routes calls to your chosen Perplexity model.
Custom LLM Inference
Bring your own model through any OpenAI-compatible endpoint, from fast inference providers to your own GPU servers.
Custom LLM (OpenAI-compatible)
Run a Bolna voice agent on any OpenAI-compatible LLM endpoint, from Groq or Together AI to your own vLLM, SGLang, TGI, Ollama or LiteLLM server.
Baseten
Baseten runs open models for a Bolna voice agent through shared Model APIs or your own Truss deployment on dedicated GPUs, including fine-tuned weights.
Cerebras
Cerebras serves gpt-oss-120b at around 3,000 tokens per second as the LLM for a Bolna voice agent, so long replies and tool calls finish almost instantly.
Fireworks AI
Fireworks AI serves open models to a Bolna voice agent on serverless per-token access or on-demand GPU deployments, connected as an OpenAI-compatible custom LLM.
Groq
Groq runs Llama and GPT-OSS on fast LPU hardware as the LLM for a Bolna voice agent, shortening the pause between the caller finishing and the agent speaking.
Modal
Modal lets you self-host an open-weight LLM with vLLM on serverless GPUs, in a region near your callers, and use it as the model behind a Bolna voice agent.
Nebius
Nebius Token Factory serves open models such as DeepSeek, Qwen and Llama to a Bolna voice agent, with dedicated endpoints in a region you choose for data residency.
Simplismart
Simplismart serves speed-optimised open models to a Bolna voice agent on a shared endpoint or a dedicated deployment, including your own fine-tuned weights.
Together AI
Together AI gives a Bolna voice agent a large serverless catalog of open models such as Llama, Qwen, DeepSeek and MiniMax, billed per token with no provisioning.
Speech-to-Speech Models
One realtime model hears the caller and speaks back, replacing the separate transcriber, LLM and voice.
Gemini Live
Gemini Live runs a Bolna voice agent on Google's native-audio speech-to-speech model, with 30 prebuilt voices and session resumption for calls past 15 minutes.
OpenAI Realtime
OpenAI Realtime runs a Bolna voice agent on one speech-to-speech model that hears the caller and speaks back, replacing the separate transcriber, LLM and voice.
Transcribers (Speech-to-Text)
Convert spoken words into text in real time. Accuracy and latency determine conversation quality.
AssemblyAI
AssemblyAI Universal-3.6 Pro transcribes callers for your Bolna voice agent in 32 languages, with code-switching and keyword plus context biasing.
Azure Speech-to-Text
Azure Speech-to-Text transcribes callers in real time for a Bolna voice agent, with speaker diarization, language identification and phrase lists of up to 2,000 terms.
Deepgram
Deepgram is Bolna's default English transcriber, turning caller speech into text with Nova-3, Nova-2 or Flux streaming models on live phone calls.
ElevenLabs Scribe (STT)
ElevenLabs Scribe v2 Realtime transcribes callers for a Bolna voice agent in about 150ms, across 90 languages, with word-level timestamps and auto language detection.
Google Gemini (STT)
Google's Gemini 3.5 Transcribe gives a Bolna voice agent streaming speech-to-text in 19 language codes, including Hindi, Tamil and Bengali, on phone and web calls.
Gladia
Gladia's Solaria model gives a Bolna voice agent real-time speech-to-text in 100+ languages with code-switching, custom vocabulary and under 300ms of latency.
OpenAI (STT)
OpenAI's GPT Realtime Whisper streams speech-to-text for a Bolna voice agent, with built-in voice activity detection, noise reduction and a delay setting for accuracy.
Sarvam AI (STT)
Sarvam's Saaras models transcribe Indian callers for your Bolna voice agent in Hindi, English and 10 more Indian languages, including code-mixed Hinglish.
Smallest AI (Pulse)
Smallest AI's Pulse model transcribes callers for your Bolna voice agent with sub-100ms first-token latency, keyword weights and speaker labels.
Soniox
Soniox stt-rt-v5 transcribes callers for your Bolna voice agent with one multilingual model that auto-detects and code-switches, including Hinglish.
Synthesizers (Text-to-Speech)
Convert agent responses into natural-sounding speech. Voice quality shapes caller experience.
Amazon Polly
Amazon Polly gives your Bolna voice agent low-cost text-to-speech with generative, neural and standard engines across a broad range of locales.
Azure Text-to-Speech
Azure Text-to-Speech gives your Bolna voice agent Microsoft's neural voices in many languages, covered by Bolna's flat per-minute rate on the neural model.
Cartesia
Cartesia gives your Bolna voice agent fast Sonic text-to-speech in 42 languages, including Hindi, with voice cloning and your own API key.
Custom TTS
Custom TTS lets your Bolna voice agent speak through your own OpenAI-compatible text-to-speech server, such as vLLM-Omni or an open-weight model, with your key.
Deepgram Aura
Deepgram Aura gives your Bolna voice agent fast, accurate English text-to-speech with the aura-2 model, and pairs with Deepgram transcription on one account.
ElevenLabs
ElevenLabs is Bolna's default voice. It gives your agent natural speech, Indian and American voices, voice cloning and models covering up to 74 languages.
Kalpa Labs
Kalpa Labs gives your Bolna voice agent text-to-speech that speaks English, Hindi and code-switched Hinglish from one model, with no language setting needed.
Maya
Maya gives your Bolna voice agent native-sounding text-to-speech in 10 Indian languages plus Indian English, with two voices and mid-call language switching.
Rime
Rime gives your Bolna voice agent natural, conversational English speech through its Arcana and Mist v2 models, with your own Rime account.
Sarvam AI (TTS)
Sarvam Bulbul v3 gives your Bolna voice agent native-sounding speech in Hindi, Tamil, Telugu and 8 more languages, with 16 voices to choose from.
Smallest AI
Smallest AI gives your Bolna voice agent low-latency Lightning text-to-speech, with 149 Pro voices in Indian, British and American accents.
Soniox (TTS)
Soniox tts-rt-v2 gives your Bolna voice agent real-time streaming speech in 63 languages from one model, with 200 named voices and voice cloning.
Telephony
Connect Bolna to phone networks to handle inbound and outbound calls at scale.
Native Telephony Integrations
Managed integrations that let you plug in your credentials and start making calls immediately.
Exotel
Exotel lets a Bolna voice agent make and answer phone calls in India on your own ExoPhones, routed and billed through your Exotel account.
Plivo
Plivo connects a Bolna voice agent to Indian phone numbers for inbound and outbound calls. Buy a number in Bolna or bring your own Plivo account.
Twilio
Twilio lets a Bolna voice agent make and answer phone calls outside India. Buy a US number in Bolna or connect your own Twilio account and numbers.
Vobiz
Vobiz gives a Bolna voice agent Indian phone numbers for inbound and outbound calls. Buy a Vobiz number in Bolna after KYC, or connect your own account.
SIP / Bring Your Own Telephony
Connect any SIP-compatible carrier or PBX to Bolna. Full control over your telephony infrastructure.
Acefone SIP Trunking
Connect Acefone to a Bolna voice agent as a Custom SIP trunk, so the agent answers and places calls on your Acefone numbers while Acefone bills the minutes.
Airtel SIP Trunking
Connect an Airtel Business SIP trunk to a Bolna voice agent as a Custom trunk, so the agent answers and places calls on your Airtel numbers at your Airtel rates.
Exotel SIP
Connect an Exotel SIP trunk to a Bolna voice agent with Bolna's Exotel preset, so the agent answers and places calls on your Exotel numbers at your Exotel rates.
Generic SIP Trunk
Connect any SIP carrier to a Bolna voice agent with a SIP trunk, then answer and place AI calls on your own numbers at your own carrier rates over UDP or TCP.
Plivo SIP Trunking
Connect Plivo Zentrunk SIP trunks to a Bolna voice agent so it answers and places calls on your Plivo numbers through Plivo's own inbound and outbound trunks.
Telnyx SIP Trunking
Connect Telnyx to a Bolna voice agent with an FQDN SIP connection and the Telnyx preset, so the agent answers and places calls on your Telnyx numbers.
Twilio SIP Trunking
Connect a Twilio Elastic SIP Trunk to a Bolna voice agent so it answers and places calls on your Twilio numbers, with Twilio carrying and billing the minutes.
Vobiz SIP Trunking
Connect Vobiz SIP trunks to a Bolna voice agent so it answers and places calls on your Vobiz numbers in India, using Vobiz inbound and outbound trunks.
VoiceLink SIP Trunking
Connect VoiceLink to a Bolna voice agent as a Custom SIP trunk on port 3300, so the agent answers and places calls on your VoiceLink numbers in India.
Vonage SIP Trunking
Connect a Vonage SIP trunk to a Bolna voice agent with the Vonage preset, so the agent answers and places calls on your Vonage numbers at your Vonage rates.
Tools & Workflows
Give your voice agents real actions during live calls, from booking meetings to updating CRMs and triggering automations.
Automation
Make (formerly Integromat)
Use Make with Bolna to place outbound calls and run scenarios when a call ends, such as sending an email, SMS or WhatsApp follow-up with call data.
Zapier
Place outbound calls from your Bolna voice agents inside any Zap. Connect Bolna to Zapier with an API key and use the Make a phone call action.
n8n
Run n8n workflows from Bolna call events and make calls, run batches and manage agents with the official n8n-nodes-bolna community node.
viaSocket
Add Bolna as a node in viaSocket workflows to place outbound calls and pull agent, execution, phone number and knowledge base data into other apps.
