5 tools, ranked first by independent quality tests where they exist, then by fit for game devs. Paid placements never change the order. How we rank · Checked
| # | Tool | Free plan | Commercial use | API | MCP | Visit |
|---|---|---|---|---|---|---|
| 1 |  ElevenLabsTop pick | Free plan | Commercial on paid plans only | Available | Official MCP server | Visit ↗ |
| 2 |  Inworld AI | Free plan | Commercial use allowed | Available | Official MCP server | Visit ↗ |
| No independent quality tests yet for the tools below: ranked on game-dev fit. How | ||||||
| 3 |  Convai | Free plan | Commercial use allowed | Available | Connects to MCP servers | Visit ↗ |
| 4 |  Charisma.ai | Paid only | Commercial use allowed | Available | Not stated by vendor | Visit ↗ |
| 5 |  Gridly | Free trial or credits only | Commercial use: not stated by vendor | Available | Community server only | Visit ↗ |
No tools match these filters.
AI text-to-speech voice lines exported as audio, with lip-sync driven from that audio for 2D characters, Unity characters or Unreal MetaHumans.
Voice line (TTS)#1Top pickIndependent tests
Eleven v4 Turbo is #1 and Eleven v4 is #2 of 97 models on Artificial Analysis's blind-vote text-to-speech leaderboard. These are ElevenLabs' current models. AA text-to-speech leaderboard
Text-to-speech, voices, sound effects and music generation; usable for NPC voice lines and SFX.
For NPC voice lines and SFX; free-plan output is non-commercial, so a paid plan is required to ship.
#2Independent tests
Inworld's own Realtime TTS-2 is #7 of 97 on Artificial Analysis's text-to-speech leaderboard (TTS-2 Flash is #12). AA text-to-speech leaderboard
Realtime text-to-speech and LLM inference platform that can power voiced, interactive characters.
For realtime TTS and LLM-driven characters on pay-as-you-go pricing; its terms assign outputs to you.
#3Game-dev fit
No independent quality tests found. Ranked on game-dev fit: commercial use allowed; Unity, Unreal integrations; API. Uses voices from other providers, so other companies' leaderboard results don't count for it.
Conversational AI characters for games and virtual worlds: NPCs with voice, knowledge and actions.
For conversational NPCs with a free tier to prototype on; its terms give you ownership of AI-generated content.
#4Game-dev fit
No independent quality tests found. Ranked on game-dev fit: commercial use allowed; Unity, Unreal integrations; API. Uses voices from other providers, so other companies' leaderboard results don't count for it.
Platform for building interactive stories and AI character conversations, with script flow tools and AI voices, published to web, VR or game engines via SDKs.
For story-driven AI character conversations on pay-as-you-go credits; its terms assign input and output rights to the customer.
#5Game-dev fit
No independent quality tests found. Ranked on game-dev fit: commercial terms not stated by vendor; Unity, Unreal integrations; API.
Content and localisation platform with a game-localisation use case: spreadsheet-style grids for strings, AI translation with linguistic context, AI voiceover files and an API.
For teams that want game strings, AI translation and voiceover files in one tool; there is no free plan, only a 14-day trial.