AssemblyAI and Cartesia split voice agents by layer

AssemblyAI and Cartesia are competing on more than voice quality, with each company now offering a broader stack for voice agents rather than a single text-to-speech model. The comparison turns on three separate layers: speech synthesis, speech recognition and agent orchestration, along with pricing, language coverage and published benchmark results. According to the companies' pricing pages and docs as of October 28, 2026, AssemblyAI lists AssemblyAI-TTS-1 for text-to-speech, Universal-3.6 Pro Realtime for streaming speech-to-text and LLM Gateway for model access, while Cartesia lists Sonic 3.6 for text-to-speech, Ink 2 for speech-to-text and Managed Agents as a hosted agent product billed…

Source: Blockchain.News