Kotoba
An open-source AI companion that actually does things
Details
- External ID
- 1247898
- Source
- PH
- Company
- —
- Product
- Kotoba
- Website domain
- producthunt.com
- Launched
- Sept. 12, 2026
- Cohort
- —
- Upvotes
- 3
- Upvotes percentile
- 0.8905013897797733
- Tags
- Open Source, Artificial Intelligence, GitHub, Virtual Assistants
- Fetched at
- Sept. 14, 2026, 1:01 a.m.
- Updated at
- Sept. 14, 2026, 1:01 a.m.
Description
Kotoba is an open-source AI companion with a Live2D face, real-time two-way voice, and an agent that runs on your own machine behind an approval gate.
Enrichment
- Theme
- task-specific ai agents and assistants
- Vertical
- Horizontal
- Function
- Agent / copilot
- Audience
- Developer
- AI stance
- AI-native
- Project type
- Hobby / open-source project
- Normalized one-liner
- open-source ai agent that takes actions
- Manually corrected
- False
Could you build this?
Partial While LLM orchestration and web UIs are standard, integrating real-time two-way audio streaming with Live2D lip-sync and low-latency local execution requires complex integration.
What it would actually take: The architecture requires a Python agent backend using WebSockets or WebRTC to stream duplex audio to a frontend rendering a Live2D Cubism model with synchronized phoneme/viseme lip-sync. The hard parts are achieving sub-500ms voice-to-voice turn-around latency (incorporating VAD, streaming STT, LLM token streaming, and streaming TTS) while safely orchestrating OS-level agent actions through human-in-the-loop security gates. It requires expertise in WebRTC/audio pipelines and 2D avatar rendering frameworks.
Competitors
Other products that read as similar to this one — 29 launches clear the similarity bar, closest 8 shown.
Attention rank: #2 of 30 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 240 days after the earliest competitor.
- Kira Ai · ph · 2026-09-12 · 1 upvotes · similarity 0.38
- Patchx-OpenDeskRobot · github · 2026-09-16 · 12 upvotes · similarity 0.36
- Kaiwa Talk · ph · 2026-09-30 · 1 upvotes · similarity 0.36
- PandaProbe · ph · 2026-05-03 · 341 upvotes · similarity 0.35
- SpeechifyAI Simba Voice Agents · ph · 2026-07-13 · 161 upvotes · similarity 0.35
- Synctoolo · ph · 2026-09-23 · 1 upvotes · similarity 0.35
- LikhLo AI: Voice Khata & Ledger · ph · 2026-09-06 · 2 upvotes · similarity 0.35
- OMO AI · ph · 2026-09-08 · 1 upvotes · similarity 0.35
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a agent / copilot tool for Agriculture yet.