Life & fun · alternatives · 2026
24 alternatives to I hacked my son’s Duplo train to go faster using my voice
A parent modified a Duplo train set to respond to voice commands and increase its speed. This project combines hardware hacking with voice control technology applied to a children's toy. It demonstrates how everyday… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. I hacked my son’s Duplo train to go faster using my voice launched in 2022; newer entries below may have overtaken it.
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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 →
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Duolingo Bots▲631AI-powered characters to teach language conversation
2016 · duolingo.com · its alternatives →
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Our goal with this project is to build a completely open source, state of the art turn detection model that can be used in any voice AI application. I've been experimenting with LLM voice conversations since GPT-4 was first released. (There's a previous front page Show HN about Pipecat, the open source voice AI orchestration framework I work on. [1]) It's been almost two years, and for most of that time, I've been expecting that someone would "solve" turn detection. We all built initial, pretty good 80/20 versions of turn detection on top of VAD (voice activity detection) models. And…
2025 · github.com · its alternatives →
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A hackday project. Run the program, speak into your microphone and hear the response from your speakers. - rob-mccann/Pi-Voice
2013 · github.com · its alternatives →
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Teaching children how to code through play
2020 · indiegogo.com · its alternatives →
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Prankify AI▲136Create a persona and run AI powered prank calls for fun
2024 · prankify.lol · its alternatives →
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Your voice narrating their bedtime stories, every night
Jun 2026 · benostudio.com · its alternatives →
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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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A fast, open-source voice assistant powered by Groq, Cartesia, and Vercel.
2024 · swift-ai.vercel.app · its alternatives →
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Talk like anime girl in realtime on your next call
Sep 2026 · voicechanger.live · its alternatives →
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Make your friends laugh with this voice changer
2019 · play.google.com · its alternatives →
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The first multi-turn voice AI model built for conversation
2024 · its alternatives →
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Leoline▲9Hey HN, My 6-year-old was getting frustrated trying to get ChatGPT to tell him stories, so I built Leoline. AI voice assistants today aren't designed for kids - they interrupt too early, use complex language, and struggle to tell long, engaging stories. Leoline fixes that. It has a voice-only interface: kids just speak, and Leoline listens using a custom-tuned Voice Activity Detection module. It then generates long, rich and personalized stories on the fly using GPT-4o. For parents, it's a screen-free alternative to YouTube. They can define custom story rules (via system prompts) to ensure…
2025 · leoline.fun · its alternatives →
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Hi Hacker News! I’m David Huie. I’m launching SpeechOS, a drop-in voice input SDK for web apps. I was inspired by Wispr Flow and wanted the same workflow inside business apps (CRMs, docs, forms, support tools), not just a standalone tool. It’s saved me a massive amount of time vs typing. How it works: add a couple lines of JS plus an API key, and SpeechOS shows a small mic widget on every text field. Live demo: https://www.speechos.ai/ (Click a text box and the mic widget appears; click the gear icon to see settings, custom vocabulary, and snippet configuration.) Users can: -…
Jan 2026 · speechos.ai · its alternatives →
- 24VS
2024 · voicereplace.app · 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 →