AI · alternatives · 2026
24 alternatives to NovaSynth by Noveum
Test your voice agent on the callers you can’t stage.
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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NovaVoice▲578Hey HN, Today I’d like to show what I’ve recently built with my 2 friends. We’ve called it Nova. The idea is to built all-purpose AI Voice Assistant, which is able to interact with mail, to-do apps, messengers and socials, task trackers, apps like UberEats, Notion and some other daily apps. How we decided to work on it: We’ve recently read YC Request for startups Summer25 and were inspired by the idea of AI Voice Assistant for Mail by YC partner Tyler Bosmeny. What we’ve got: We’ve gone a bit further than Assistant for mail only and connected Gmail, Todoist, Google Calendar, and…
Apr 2026 · novavoice.app · its alternatives →
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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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PollyReach▲795Give your agent a real number and voice to make calls.
May 2026 · pollyreach.ai · its alternatives →
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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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KugelAudio▲106Real-time text-to-speech model you can self-host
May 2026 · kugelaudio.com · its alternatives →
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Dial▲228Give your AI agent a real phone number in 10 seconds
Aug 2026 · getdial.ai · its alternatives →
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murmur▲145practice tough phone calls with AI before you make them
Mar 2026 · drobinin.com · its alternatives →
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Ojin▲106Talk to an AI Agent with a real face and voice, in real time
Aug 2026 · ojin.ai · its alternatives →
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Mispher▲95Dictate, rewrite, translate, and an agent in a single device
Jul 2026 · mispher.com · its alternatives →
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Voice Agent API▲118One API to build production-ready voice agents
Apr 2026 · assemblyai.com · its alternatives →
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Hey HN, We built ClawdTalk to let AI agents operate over live phone calls. Most agents today live in chat windows. The moment you try to use them over voice, things break: latency matters, interruptions happen, and the agent has to execute tools while the conversation is still live. ClawdTalk connects your Clawdbot to the phone network. The agent gets a real phone number. It can make and receive calls and run the same tools it uses in chat, but under real-time voice constraints. One of the reasons this is hard is infrastructure. Many voice stacks stitch together separate telephony, speech,…
Feb 2026 · clawdtalk.com · its alternatives →
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We gave the agents a voice. Sorry in advance.
Aug 2026 · fellowgeek.github.io · its alternatives →
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On-device speech AI for Mac, Windows, Linux & Android
Jun 2026 · github.com · its alternatives →
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Hi HN folks ! I am the author of AVA, a self hosted AI Voice Agent that plugs into Asterisk/Freepbx so you own all the aspects of an AI Voice agent in your own infrastructure. It uses Asterisk native Audiosocket/RTP with python engine to run STT,LLM and TTS loop. The project support several full providers openai, gemini, grok, elevenlabs out of the box and also provides options to build custom pipelines by choosing different stt tts and llm. It also supports full local agent if you have a GPU with 25GB RAM which enables realtime conversation along with tool calling. I started this…
Jul 2026 · github.com · its alternatives →
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Elixir▲6Automated Testing & Call Review for your AI Voice Agent
2024 · tryelixir.ai · its alternatives →
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hey! this is oliver and jonathan and today, we’re launching fixa — a free, open source package to test voice agents. fixa uses a voice agent to call your voice agent and an LLM to evaluate how the conversation went. here's a demo: https://youtu.be/LAW1wW6SjTo this was initially a paid feature of our platform, but the monetization model didn't really make sense. our customers were paying us for all the components of our agent (STT + LLM + TTS + markup) in addition to their own agent – even though many of them have preferred vendors, volume discounts, and credits. we came to the…
2025 · github.com · its alternatives →
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The open source profiler for voice agents
Jul 2026 · voicegateway.dev · its alternatives →
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For a fun side weekend project we gave our own OpenClaw agent called "Mahmut" a face and had a live interview with it. It went surprisingly well. Here's a sneak peek from the interview: https://x.com/ptservlor/status/2024597444890128767 User speaks, Deepgram transcribes it, OpenClaw Gateway routes it to your agent, ElevenLabs turns the response into speech, and LemonSlice generates a lip synced avatar from the audio. Everything streams over LiveKit in real time. Latency is about 1 to 2 seconds end to end depending on the LLM. The lip sync from LemonSlice honestly…
Feb 2026 · github.com · 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 →