ElevenLabs vs Retell: Full-stack voice AI or agent middleware? (2026)

ElevenLabs and Retell provide distinct solutions for conversational AI, each with unique advantages. ElevenLabs offers a full-stack platform, owning all components like Text-to-Speech (TTS), Speech-to-Text (STT), and agent logic, which results in sub-300ms streaming latency and superior voice quality that ranks #1 in independent tests. This setup avoids middleware, thus reducing latency and costs. Retell, on the other hand, operates as a middleware, orchestrating third-party components such as ElevenLabs, OpenAI, and Deepgram, and offers a visual, no-code agent builder for greater flexibility, albeit at the cost of higher latency and potentially higher costs due to component stacking. While ElevenLabs is ideal for those seeking the best voice quality and lower latency without third-party dependencies, Retell is suitable for users needing flexibility and a visually intuitive interface. Both platforms offer telephony integration and compliance with major standards, but ElevenLabs extends its offerings beyond voice agents to include a broader range of audio AI capabilities.

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