ElevenLabs and Bland.ai are conversational AI platforms designed to create customizable voice agents for a range of applications, with ElevenLabs focusing on in-house development of text-to-speech (TTS) and speech-to-text (STT) models for better latency and reliability, while Bland.ai emphasizes phone call automation and business process integration. ElevenLabs offers a comprehensive voice library with support for over 70 languages and integrated TTS and STT services, providing advantages in latency and quality, along with customizable data retention options. Bland.ai, on the other hand, provides voice agents with a focus on telemarketing and offers multilingual support primarily for enterprise clients, relying on third-party models for certain functionalities. Both platforms support telephony integration with options such as Twilio, with ElevenLabs offering in-house solutions for improved performance and Bland.ai providing flexible telephony systems for enterprise clients. Ultimately, the choice between the two platforms depends on specific needs, such as language support, customization capabilities, and integration preferences.