Hi7o is building a real-time multilingual conversation translator that works across text chat, phone calls, and live video calls, aiming for speech-to-speech translation that feels like a normal conversation rather than a “record → transcribe → translate later” workflow. The pitch is simple: speak in your native language, and the other person hears it immediately in theirs, with a claimed ~300 ms end-to-end delay and output that can keep your own vocal identity instead of switching to a generic synthetic narrator. https://www.hi7o.com/
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Under the hood, the interesting part is the architecture: instead of one monolithic AI model doing everything, they describe a microservices pipeline where speech is captured, run through low-latency ASR + language ID, then translated (NMT/LLM-style), and finally re-synthesized with TTS and voice-cloning (speaker embedding + prosody/tone matching). That split matters because each stage can be optimized independently for latency budgets, scaling, and failure modes, which is how you even attempt “near real time” in a production voice flow.
The demo focus is on live meetings: translated voice inside video calls, plus multilingual group calls where multiple participants can speak different languages at once (they mention up to 50 participants). Compared with tools that mainly add subtitles, the technical claim here is full speech-to-speech with fast turn-taking, so the “translation layer” becomes part of the audio channel rather than an afterthought on top of the call room.
Hi7o also positions itself as something you can integrate, not only a standalone app: they talk about exposing the capability as an SDK/API and running it as SaaS, where infrastructure cost (compute + realtime media) is a big driver today. Pricing in the interview is described as subscription-based (around 49.50/month), with extra costs potentially tied to usage or added languages, and they emphasize EU-hosted data and security posture like end-to-end encryption as a product requirement rather than marketing noise.
This interview was filmed at Web Summit Lisbon 2025, and it frames Hi7o as an early-stage team still hiring and actively looking to expand partnerships and investor contacts. The most concrete takeaway is the engineering target: low-latency, microservices-based speech translation with voice cloning for calls and meetings, plus a consumer app they say is planned around the end of January 2026, which will be the real test of whether the latency and quality hold up at scale in the wild next.
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