Allô is a mobile-first business phone system designed for small to medium-sized businesses, developed by the Mobile First Company with backing from Lightspeed Venture Partners. The app transforms mobile devices into comprehensive business communication hubs, offering features such as AI-driven call summaries, spam blocking, and smart routing. It utilizes ElevenLabs' Text to Speech and Conversational AI technologies to provide fast, natural-sounding, multilingual voice interactions, featuring voices like Mylene for French users and Tanya for English speakers. The integration of these technologies allows Allô to deliver low-latency and highly responsive voice experiences across various telephony functions, including pre-recorded messages and real-time AI agents. After switching from a previous vendor, Allô saw significant improvements in voice quality and latency, leading to better user engagement and fewer complaints. The rapid development cycle and support from the ElevenLabs Startup Grants program enabled Allô to quickly bring their product from concept to production, demonstrating the potential of integrating advanced AI voice technologies in modern communication systems.