Best for: Low-latency voices and live NPC dialogue via API
Realtime voice and inference API for developers: text-to-speech, speech-to-text, speech-to-speech and many LLMs through one API, with games listed as a use case. Good for wiring spoken NPC dialogue into a game; API-first, not no-code.
ElevenLabsVoices + sound effects
Character voices, narration and sound effects for games
AI audio platform: type a script or describe a sound to generate speech, sound effects or music, with voice cloning and dubbing too. Good for game character dialogue and narration, with 5,000+ voices in 90+ languages.
ConvaiAI characters and NPC dialogue
Talking AI NPCs inside Unity or Unreal scenes
Platform for conversational AI characters. Define a character's look, voice, knowledge and traits in Convai Playground, then add it to a game via the Unity SDK or Unreal plugin, where it talks in real time and can perceive and act in the scene.
Charisma.aiConversational character experiences
Scripted branching conversations with AI characters
Platform for interactive conversational stories. Build scenes in a graph editor mixing scripted and generative dialogue, with memories, emotions and voices, then play them on the web or in Unity or Unreal via its SDKs. Now marketed mainly for training.