Best free Bolna alternatives

✦ WhyA Bolna alternative — Wraps any text LLM with Kyutai's streaming speech-to-text and text-to-speech for voice conversation.

• Wraps any text LLM with Kyutai's streaming speech-to-text and text-to-speech for voice conversation
• Open-source code and weights that can be self-hosted
• Low-latency interruptible conversation
• Free demo available online

✦ WhyA Bolna alternative — Orchestrates STT/LLM/TTS providers of choice into one low-latency voice-agent pipeline.

• Orchestrates STT/LLM/TTS providers of choice into one low-latency voice-agent pipeline
• Usage-based per-minute pricing with free trial minutes included
• SOC 2/HIPAA/PCI compliance add-ons for regulated call-center deployments

✦ WhyA Bolna alternative — Free starting credit with no contract required.

• Free starting credit with no contract required
• Supports swapping GPT, Claude or Gemini as the reasoning layer per agent
• Batch calling campaigns plus live AI-to-human call transfer built in

✦ WhyA Bolna alternative — All-in-one per-minute pricing bundles LLM+STT+TTS with no separate token pass-through charges.

• All-in-one per-minute pricing bundles LLM+STT+TTS with no separate token pass-through charges
• Free start with call credits plus an inbound number included
• Tiered platform fees (Build/Scale) unlock lower per-minute rates for high volume

✦ WhyA Bolna alternative — Speech-native processing skips the STT-to-text bottleneck, preserving tone/cadence/pitch.

• Speech-native processing skips the STT-to-text bottleneck, preserving tone/cadence/pitch
• Free tier: 5¢/min including TTS for up to 5 concurrent calls
• Open-weight models (fixie-ai) published on Hugging Face for research use

✦ WhyA Bolna alternative — Apache-2.0 open-source framework, fully self-hostable on your own servers.

• Apache-2.0 open-source framework, fully self-hostable on your own servers
• Native WebRTC client support across web/mobile/telephony out of the box
• Native Model Context Protocol (MCP) support for tool-using voice agents

✦ WhyA Bolna alternative — BSD-2-Clause open-source Python framework for real-time voice/multimodal agents.

• BSD-2-Clause open-source Python framework for real-time voice/multimodal agents
• Supports distributed multi-agent systems with handoffs over a shared bus
• Maintained by Daily with an active plugin ecosystem for STT/LLM/TTS providers

✦ WhyA Bolna alternative — Open-source framework for real-time conversational voice and multimodal agents.

• Open-source framework for real-time conversational voice and multimodal agents
• Modular graph of extensions in Python, Go, C++ and Node
• Ships a playground and a VAD and turn-detection model
• Free to self-host under an open license

✦ WhyA Bolna alternative — Open-source ESP32 voice chatbot with wake word, Opus streaming and a display.

• Open-source ESP32 voice chatbot with wake word, Opus streaming and a display
• Free official server lets personal users try a Qwen real-time model after registering
• Device-side and cloud MCP for controlling IoT gadgets
• MIT licensed firmware supporting many ESP32 chips