Compare Retell AI with top alternatives in the voice agents category. Find detailed side-by-side comparisons to help you choose the best tool for your needs.
These tools are commonly compared with Retell AI and offer similar functionality.
Voice AI
Build production-ready voice AI agents with modular STT, LLM, and TTS components - developers control every aspect of real-time conversation pipelines for phone and web deployment
Voice & Speech
Enterprise conversational AI platform for building voice agents that handle inbound and outbound phone calls with sub-300ms latency, warm transfers, and comprehensive telephony integrations.
Voice Agents
No-code AI voice agent platform for building conversational phone agents that handle calls, bookings, and support.
Other tools in the voice agents category that you might want to compare with Retell AI.
Voice Agents
Enterprise conversational AI platform for building intelligent virtual assistants with voice, chat, and process automation capabilities.
Voice Agents
LiveKit Agents: Real-time media infrastructure platform with an integrated agent framework for building voice and video AI assistants that can participate in live conversations. Enables developers to create AI agents that can see, hear, and speak in real-time video calls, with support for spatial audio, screen sharing, and multi-participant interactions.
Voice Agents
Murf AI: AI voice generation platform offering 200+ ultra-realistic text-to-speech voices in 35+ languages for voiceovers, audiobooks, and presentations.
Voice Agents
AI phone agent platform for building human-like voice agents that handle inbound and outbound calls for businesses.
💡 Pro tip: Most tools offer free trials or free tiers. Test 2-3 options side-by-side to see which fits your workflow best.
Retell AI uses modular per-minute pricing with three mandatory components: voice infrastructure ($0.055/min), TTS ($0.015-$0.040/min depending on provider), and LLM ($0.003-$0.16/min depending on model). Add optional extras like knowledge base (+$0.005/min), denoising (+$0.005/min), or PII removal (+$0.01/min). SIP trunking telephony is free; phone calls add ~$0.015/min. Realistic total: $0.10-$0.25/min for most production setups.
No, Retell AI is cloud-hosted only. The real-time voice orchestration runs on Retell's infrastructure. For HIPAA compliance, the Enterprise plan offers BAA agreements and data controls. For self-hosted alternatives, LiveKit provides open-source real-time audio infrastructure, though replicating Retell's turn-taking requires significant engineering.
For most use cases, GPT-4.1 ($0.045/min) or GPT-4.1 Mini ($0.016/min) paired with Retell Platform Voices ($0.015/min) offers the best balance. This gives you total costs of $0.115-$0.13/min with strong conversation quality. For budget agents handling simple tasks, GPT-5 nano ($0.003/min) brings total costs to ~$0.073/min.
Pay-as-you-go includes 20 concurrent calls, with additional capacity at $8/month per concurrent slot. Enterprise plans have no cap on concurrent calls and include dedicated server infrastructure for consistent performance under load.
Yes, Retell AI offers chat agents with per-message pricing separate from voice. Chat pricing ranges from $0.001/message (GPT-5 nano) to $0.03/message (Claude 4.5 Sonnet). Chat agents support SMS at $0.01/message and can share the same knowledge base and function calling setup as voice agents.
Compare features, test the interface, and see if it fits your workflow.