33 of 109Human speech and open licences first
| Save | Full-duplex | Languages | Licence | Source | Speech | ||||
|---|---|---|---|---|---|---|---|---|---|
 otoSpeech-full-duplex-280hotoearth | Full-duplex | 280 h | — | en | Permissive | Consented | human | 2026-02 | |
| Full-duplex | 141 h | — | en | Permissive | Consented | human | 2026-02 | ||
| Full-duplex | 20 h | — | en | Permissive | Consented | human | 2026-08 | ||
| Full-duplex | 17.4 h | — | en | Permissive | Consented | human | 2026-09 | ||
| Full-duplex | 5.1 h | — | en | Permissive | Consented | human | 2026-10 | ||
Real-TurnTurkAta Technology Platforms | Full-duplex | 1.94 hpublic subset | — | tr | Permissive | Not stated | human | 2026-08 | |
| Full-duplex | 128.6 h | — | en | Share-alike | Consented | human | 2026-04 | ||
 Seamless InteractionMeta FAIR | Full-duplex | 4,000+ h | — | en | Non-commercial | Consented | human | 2025-06 | |
SmoothConv / DuplexConvASLP@NPU / QualiaLabs | Full-duplex | 2,100 h100 h + 2,000 h | — | zh | Non-commercial | Consented | human | 2026-06 | |
CANDORBetterUp Labs (Reece, Cooney et al.) | Full-duplex | 850 h | — | en | Non-commercial | Consented | human | 2023-03 | |
 Multi-stream Spontaneous Conversation (zh+en)Magic Data Technology | Full-duplex | 15 h10 zh + 5 en | — | zh en | Non-commercial | Consented | human | 2024-11 | |
| Japanese Duplex Conversation DatasetMagicData | Full-duplex | 10.35 h | — | ja | Non-commercial | Consented | human | 2025-04 | |
| Full-duplex | 1,960 h | $42,000$21/h | en | Gated | Consented | human | 2004-12 | ||
| Full-duplex | 1,502 h | — | en es fr +19 | Gated | Consented | human | 2026-09 | ||
Open Yap 1KThe Agentic Data Company | Full-duplex | 1,000 h8.9 h open sample | — | en | Gated | Consented | human | 2026-09 | |
| Full-duplex | 260 h | $35,500$137/h | en | Gated | Consented | human | 1993-01 | ||
| Full-duplex | ~229 h2026 Second Editions | — | ja zh es +3 | Gated | Consented | human | 1996-01 | ||
| otoSpeech-full-duplex-turn-104hotoearth | Full-duplex | 105 h | — | en | Gated | Consented | human | 2026-06 | |
DAI-ASR-I18NDavid AI | Full-duplex | 42.1 h | — | en zh ja +18 | Gated | Consented | human | 2026-10 | |
English (US) Conversational SpeechSpeechData.ai | Full-duplex | 1,500 h | $135,000$90/h | en | Custom | Consented | human | — | |
| otoSpeech 1,125hotoearth | Full-duplex | 1,125 h | $11,250$10/h | en | Custom | Consented | human | 2026-11 | |
| otoSpeech Videootoearth | Full-duplex | — | — | en | Custom | Consented | human | — | |
| otoSpeech Face-to-Faceotoearth | Full-duplex | — | — | en | Custom | Consented | human | — | |
| otoSpeech 3-Speakerotoearth | Full-duplex | — | — | en | Custom | Consented | human | — | |
| otoSpeech Koreanotoearth | Full-duplex | — | — | ko | Custom | Consented | human | — | |
| otoSpeech Japaneseotoearth | Full-duplex | — | — | ja | Custom | Consented | human | — | |
| otoSpeech Role-Playotoearth | Full-duplex | — | — | ja | Custom | Consented | human | — | |
| otoSpeech Scriptedotoearth | Full-duplex | — | — | ja | Custom | Consented | human | — | |
| otoSpeech Egocentricotoearth | Full-duplex | — | — | en | Custom | Consented | human | — | |
DuplexChatNakata, Saito, Saruwatari (U. Tokyo / AIST) | Full-duplex | 415k h | — | en ja | Custom | Public media | human | 2026-07 | |
Global Conversational SpeechUsergyAI | Full-duplex | 305 h | $19,825$65/h | zh en es +8 | Custom | Not stated | human | 2026-04 | |
 VartalaapKapture CX | Full-duplex | 5,446 h | — | hi en | Non-commercial | Consented | synthetic | 2026-08 | |
MultiTalkPT / MultiTalkFTCUHK MMLab | Full-duplex | 57.6k h | — | en zh | Non-commercial | Not stated | synthetic | 2026-09 |
