AI · alternatives · 2026
24 alternatives to Real-time AI voice conversations with <0.5s latency
Avaturn.live is a voice-to-voice AI assistant that lets you speak to an avatar in real time. We managed to reach <0.5 sec response time so that the conversation with an avatar feels more natural. Also what do you think about our lip sync? We were struggling a lot to reach our current level. Initial use case we're exploring: Automated product demos/sales, where the AI avatar can showcase features and answer questions in real-time. Demo: https://dashboard.avaturn.live/demo You can try talking to an avatar about anything
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Real-time AI voice conversations with <0.5s latency launched in 2024; newer entries below may have overtaken it.
- 1
Avaturn Live▲320AI avatars 9X faster, 4X expressive range w/, human fidelity
Nov 2025 · avaturn.live · its alternatives →
- 2
Have a natural, spoken conversation with AI! Contribute to KoljaB/RealtimeVoiceChat development by creating an account on GitHub.
2025 · github.com · its alternatives →
- 3
I built a voice agent from scratch that averages ~400ms end-to-end latency (phone stop → first syllable). That’s with full STT → LLM → TTS in the loop, clean barge-ins, and no precomputed responses. What moved the needle: Voice is a turn-taking problem, not a transcription problem. VAD alone fails; you need semantic end-of-turn detection. The system reduces to one loop: speaking vs listening. The two transitions - cancel instantly on barge-in, respond instantly on end-of-turn - define the experience. STT → LLM → TTS must stream. Sequential pipelines are dead on arrival for natural…
Mar 2026 · ntik.me · its alternatives →
- 4
Luke from ElevenLabs here. We just released Scribe Realtime v2, our new real-time Speech to Text model. We rebuilt it from the ground up around a new architecture that uses predictive transcription – it anticipates the next likely word before it’s spoken. That makes it both fast (around 150 ms latency) and highly accurate. Scribe v2 Realtime outperforms every low latency transcription model across 30 commonly used EU and Asian languages – 93.5% accuracy, compared to Gemini 2.5 Flash (91.4%), GPT-4o MiniTranscribe (90.7%), and Deepgram Nova 3 (85%). It supports 90+ languages including…
2025 · elevenlabs.io · its alternatives →
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Premium AI voice quality without the premium price tag.
2025 · async.com · its alternatives →
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Retell AI▲296API that helps developers build human-like voice agents
2024 · retellai.com · its alternatives →
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AI Chat-avatar▲696Conversational AI assistant always ready do the job for you
2025 · pitchavatar.com · its alternatives →
- 8
Dubbing AI▲671Change your voice to anyone in realtime with AI, for free
2023 · dubbingai.io · its alternatives →
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Realtime lifelike interactive avatars for conversational AI
Nov 2025 · liveavatar.com · its alternatives →
- 11
Talk like anime girl in realtime on your next call
Sep 2026 · voicechanger.live · its alternatives →
- 12
Last year when GPT-4 was released I started making lots of little voice + LLM experiments. Voice interfaces are fun; there are several interesting new problem spaces to explore. I'm convinced that voice is going to be a bigger and bigger part of how we all interact with generative AI. But one thing that's hard, today, is building voice bots that respond as quickly as humans do in conversation. A 500ms voice-to-voice response time is just barely possible with today's AI models. You can get down to 500ms if you: host transcription, LLM inference, and voice generation all together in one place;…
2024 · fastvoiceagent.cerebrium.ai · its alternatives →
- 13
Ojin▲106Talk to an AI Agent with a real face and voice, in real time
Aug 2026 · ojin.ai · its alternatives →
- 14
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Pushing the boundaries of conversational AI
2025 · rapport.cloud · its alternatives →
- 16LU
Hey HN, we're the co-founders of LemonSlice (try our HN playground here: https://lemonslice.com/hn). We train interactive avatar video models. Our API lets you upload a photo and immediately jump into a FaceTime-style call with that character. Here's a demo: https://www.loom.com/share/941577113141418e80d2834c83a5a0a9 Chatbots are everywhere and voice AI has taken off, but we believe video avatars will be the most common form factor for conversational AI. Most people would rather watch something than read it. The problem is that generating video in real-time…
Jan 2026 · its alternatives →
- 17
24/7 custom AI livechat + realtime voice chatbot
2024 · chat-data.com · its alternatives →
- 18LS
Hey HN, this is Lina, Andrew, and Sidney from Lemon Slice. We’ve trained a custom diffusion transformer (DiT) model that achieves video streaming at 25fps and wrapped it into a demo that allows anyone to turn a photo into a real-time, talking avatar. Here’s an example conversation from co-founder Andrew: https://www.youtube.com/watch?v=CeYp5xQMFZY. Try it for yourself at: https://lemonslice.com/live. (Btw, we used to be called Infinity AI and did a Show HN under that name last year: https://news.ycombinator.com/item?id=41467704.) Unlike existing…
2025 · its alternatives →
- 19OS
Hey HN, it’s Russ - cofounder of LiveKit. An open source stack for building realtime AI applications. We’re sharing our first homegrown AI model for turn detection. Here’s a live demo: https://cerebras.vercel.app/ Voice AI has come a long way in the last year. We now have end-to-end systems that can generate a response to user input in 300-500ms — human level speeds! As latency reduces, a common problem that surfaces is the LLM responds too quickly. Any time there’s a short pause in a user’s speech, it ends up interrupting them. This is largely due to how voice AI applications…
2024 · its alternatives →
- 20
Beni AI▲78Hi HN, I built Beni (https://thebeni.ai ), a web app for real-time video calls with an AI companion. The idea started as a pretty simple question: text chatbots are everywhere, but they rarely feel present. I wanted something closer to a call, where the character actually reacts in real time (voice, timing, expressions), not just “type, wait, reply”. Beni is basically: A Live2D avatar that animates during the call (expressions + motion driven by the conversation) Real-time voice conversation (streaming response, not “wait 10 seconds then speak”) Long-term memory so the character…
Feb 2026 · thebeni.ai · its alternatives →
- 21
AI Voice Cloning▲182Clone any voice in 3 seconds – hyper-realistic and free
2025 · anyvoice.net · its alternatives →
- 22
The most advanced AI avatar model in the world
Apr 2026 · heygen.com · its alternatives →
- 23
Make an AI voice chat app in 21 lines of JavaScript
2024 · github.com · its alternatives →
- 24
TLDR: We created a personalised Andrej Karpathy tutor that can response to questions about his Youtube videos in sub 1 second responses (voice-to-voice). We do this using a voice enabled RAG agent. See later in the post for demo link, Github Repo and blog write up. A few weeks ago we released the worlds fastest voice bot, achieving 500ms voice-to-voice response times, including a 200ms delay waiting for a user to stop speaking. After reaching the front page of HN, we thought about how we could take this a step further based on feedback we were getting from the community. Many companies were…
2024 · educationbot.cerebrium.ai · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →