Buzz: Popular open-source desktop app that transcribes and translates audio offline on your own computer using OpenAI's Whisper. Koncert: AI sales dialer with call recording and conversation intelligence, plus an AI PitchLab roleplay add-on for cold-call practice. Which one wins depends on your platform mix, budget, and how hands-off you want notes to be.
How Hosiqo compares and tests toolsFinal recommendation
Shortlist Buzz when transcribing recorded meetings, interviews, podcasts, or lectures offline matters most, and Koncert when managers coaching reps from recorded calls and a remote salesfloor matters most. Trial each on a few real meetings before you commit — the better fit usually shows fast.
Popular open-source desktop app that transcribes and translates audio offline on your own computer using OpenAI's Whisper.
AI sales dialer with call recording and conversation intelligence, plus an AI PitchLab roleplay add-on for cold-call practice.
Buzz is a widely used open-source desktop application that transcribes and translates audio offline on the user's personal computer, powered by OpenAI's Whisper. It is MIT-licensed and actively maintained, with v1.4.4 released in March 2026, and it has grown a large community with roughly 19.7k GitHub stars. Buzz runs on macOS, Windows, and Linux, with installation options including Flatpak, Snap, and PyPI. It supports both importing existing audio and video files and real-time transcription from microphone input, and it can export results in formats such as TXT, SRT, and VTT for subtitling and documentation. The app includes an advanced transcript viewer with search and playback controls, a watch folder for automatically transcribing new files, and a command-line interface for automation. It offers GPU acceleration through CUDA for Nvidia cards, Apple Silicon support, and Vulkan for many other GPUs, which makes faster transcription practical even on laptops. Buzz also provides speaker identification and speech separation for noisy audio, plus a plugin system that adds capabilities like AI-generated summaries. Because all processing happens locally, recordings and transcripts remain on the user's machine rather than being uploaded to a cloud service. Pricing varies by plan. Check the official website for current pricing.
Best suited for
Koncert is a B2B sales engagement platform built around AI-powered dialing, call recording, and coaching for outbound teams. Its dialer suite includes options such as an AI Parallel Dialer and an AI Flow Dialer that filter voicemails and connect reps to live answers to increase connected conversations and connect rates. Calls are recorded and run through conversation intelligence that scans for objections and other signals so managers can coach reps at scale, and a remote Salesfloor gives managers a virtual workspace for real-time coaching during calls. Koncert also includes a multi-channel cadence sequencer spanning phone, email, video, text, and social, plus caller ID management that selects local numbers and monitors number health. For practice and training, Koncert offers AI PitchLab, an add-on where reps rehearse pitches against AI-powered buyer personas without the pressure of a live prospect, with objection-handling practice and automatic transcription and scoring of performance. Together these capabilities target outbound sales teams, SDRs, and managers who want dialing, real-call analysis, and structured roleplay practice within one platform. Pricing varies by plan. Check the official website for current pricing.
Best suited for
Buzz is a free tier with paid upgrades (freemium); Koncert is a free tier with paid upgrades (freemium). Always confirm current pricing on each vendor's site before buying.
| Feature | Buzz | Koncert |
|---|---|---|
| Core capability | Offline transcription and translation using OpenAI's Whisper | AI Parallel and AI Flow dialers that filter voicemails and connect live answers |
| Standout feature | Real-time transcription from microphone input | Automatic call recording with conversation intelligence that detects objections |
| Team usage | Speaker identification and speech separation for noisy audio | AI PitchLab add-on for AI persona roleplay and cold-call practice |
| Integrations | Exports to TXT, SRT, and VTT | Objection-handling practice with automatic transcription and scoring |
| Languages & capture | Watch folder for automatic transcription and a command-line interface | Remote Salesfloor for real-time manager coaching during calls |
| Best-fit workflow | GPU acceleration via CUDA, Apple Silicon, and Vulkan | Multi-channel cadence sequencer across phone, email, video, text, and social |
Buzz
Choose Buzz if you need transcribing recorded meetings, interviews, podcasts, or lectures offline — strengths include fully offline so audio and transcripts stay on the user's computer.
Koncert
Choose Koncert if you need outbound sdr teams running high-volume parallel dialing with recorded calls — strengths include combines an ai dialer, call recording, and roleplay practice in one platform.
Buzz
Koncert
It depends on your workflow. Buzz is strong for transcribing recorded meetings, interviews, podcasts, or lectures offline, while Koncert is strong for outbound sdr teams running high-volume parallel dialing with recorded calls. Both transcribe and summarize meetings.
Buzz is a free tier with paid upgrades and Koncert is a free tier with paid upgrades. Check each vendor's pricing page for the latest plans and free-tier limits.
You can — some teams pair them when each covers a different part of the meeting workflow.
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