Convai
Real-time voice NPCs with memory and actions for Unity, Unreal, and Roblox.
About
Convai is a platform for building interactive 3D AI characters: developers define personality, backstory, voice, and a knowledge base, then players talk to NPCs naturally through voice or text. Characters perceive their scene, remember conversations, and execute actions based on motivation, with plugins for Unity, Unreal Engine, and Roblox plus an open API.
Its knowledge-base grounding directly targets LLM hallucination, which matters for lore-heavy games. The free tier (100 interactions/month) makes prototyping cheap. Limitations: cloud-only processing means no offline play and latency depends on network conditions; public releases require Convai attribution unless waived.
What it can do
- End-to-end voice-based NPC conversations
- Custom knowledge bases to ground responses
- Scene perception and action execution
- Character memory across conversations
- 65+ languages
- No-code character creation in browser
Setup
- Create a free account at convai.com and design a character (personality, voice, knowledge base).
- Install the Convai plugin for your engine (Unity, Unreal, or Roblox).
- Drop the Convai character component onto your NPC asset and link your character ID.
- Test in the playground, then wire scene perception and actions.
Prerequisites
Unity, Unreal Engine, or Roblox project; internet connection for cloud processing.
Use cases
Works with
Trust score — 6/10
Scored 6/10 (metrics tier, metrics-v1). Evidence: integrations with Unity, Unreal, Roblox, Discord; NVIDIA Inception alum; proprietary cloud platform — no offline use; free tier capped at 100 interactions/month. Manual review: knowledge-base grounding is a real anti-hallucination mechanism. License: Proprietary; public apps require attribution unless waived..
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 7.0/10
- Maintenance · recency, releases, issue load
- 7.0/10
- Openness · license + docs
- 4.0/10
- Manual review · sanity read + red-flag check
- 7.0/10
- · integrations with Unity, Unreal, Roblox, Discord; NVIDIA Inception alum
- · proprietary cloud platform — no offline use
- · free tier capped at 100 interactions/month
- · manual review: knowledge-base grounding is a real anti-hallucination mechanism
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.