> ## Documentation Index > Fetch the complete documentation index at: https://docs.togai.com/llms.txt > Use this file to discover all available pages before exploring further. # Eleven Labs **Pricing model:** Usage based subscriptions (Hybrid) **Value metrics:** Number of characters, Custom voices [Eleven Labs](http://elevenlabs.io/) is a company that specializes in developing natural-sounding speech synthesis and text-to-speech software, using artificial intelligence and deep learning. ElevenLabs is primarily known for its browser-based, AI-assisted text-to-speech software, Speech Synthesis, which can produce lifelike speech by synthesizing vocal emotion and intonation. Their [pricing model](https://elevenlabs.io/pricing) is based on various input parameters like books, articles, papers and voiceovers based on which they have a usage based price per unit. Here, Sajed and Adhitya configure the pricing in Togai before the song [Stairway to heaven](https://www.youtube.com/watch?v=iXQUu5Dti4g) finishes.