WhisperLiveKit: Open-source, self-hosted real-time speech-to-text and speaker diarization toolkit with a FastAPI server and web interface, suitable for meeting transcription. Zenarate: Zenarate's Performance Analyzer is an AI tool that transcribes, redacts, and scores live contact-center agent calls for quality assurance and coaching. We compare them on cost, capture approach, and day-to-day fit so you can choose faster.
How Hosiqo compares and tests toolsFinal recommendation
Shortlist WhisperLiveKit when self-hosted real-time meeting transcription with speaker labels matters most, and Zenarate when monitoring customer sentiment and emerging call topics to surface compliance and experience issues matters most. Run both through a week of actual calls to see which suits your workflow.
Open-source, self-hosted real-time speech-to-text and speaker diarization toolkit with a FastAPI server and web interface, suitable for meeting transcription.
Zenarate's Performance Analyzer is an AI tool that transcribes, redacts, and scores live contact-center agent calls for quality assurance and coaching.
WhisperLiveKit is an open-source, self-hosted toolkit for ultra-low-latency real-time speech-to-text and speaker diarization. Rather than naively running Whisper on each audio chunk, it uses state-of-the-art simultaneous-speech research for intelligent buffering and incremental processing, which preserves transcription quality while streaming results with minimal latency. The project ships a complete backend built on FastAPI with WebSocket support, an OpenAI-compatible REST API, a Deepgram-compatible WebSocket protocol, and a simple, customizable HTML and JavaScript web interface that captures microphone audio and streams it to the server. It supports multiple ASR backends including Whisper variants, Voxtral, and Qwen3-ASR, covers 200+ languages with translation, and includes real-time speaker diarization and voice activity detection to reduce processing overhead. It can handle multiple concurrent users on a single backend and is distributed via PyPI with Docker images for both GPU and CPU. Licensed under Apache 2.0 and actively maintained into 2026, the project explicitly lists meeting transcription, accessibility tooling, and podcast or call transcription with speaker identification among its intended use cases, making it a practical building block for private, on-premise meeting transcription pipelines. Pricing varies by plan. Check the official website for current pricing.
Best suited for
Zenarate is an AI simulation-training and conversation-analytics platform for contact centers, and its Performance Analyzer (formerly Call Analyzer) is the module that turns live customer calls into structured quality and coaching data. The AI engine automatically transcribes each interaction, redacts sensitive information, and scores calls against a client's defined call model and skill expectations, processing up to 100% of calls rather than a small sampled subset. Analysis runs nightly so leaders have results the next day, with automated scorecards, sentiment analysis, topic and trend reporting, and next-action coaching recommendations. Managers can drill into specific conversation moments, listen to the audio, and add commentary directly from the scorecard. Because it sits inside Zenarate's AI Coach platform, identified gaps can be turned into personalized roleplay simulations and coaching plans. It is built for QA managers, training leaders, and contact-center operations across industries such as financial services, healthcare, insurance, telecom, retail, and travel, and supports multiple languages and global deployments.
Best suited for
WhisperLiveKit is a free tier with paid upgrades (freemium); Zenarate is custom pricing (contact sales). Always confirm current pricing on each vendor's site before buying.
| Feature | WhisperLiveKit | Zenarate |
|---|---|---|
| Core capability | Real-time streaming speech-to-text with low latency over WebSocket | AI transcription of live agent calls with automatic redaction of sensitive information |
| Standout feature | Real-time speaker diarization to distinguish multiple speakers | Automated scoring of up to 100% of calls against a client's defined call model and skill parameters |
| Team usage | FastAPI backend with OpenAI-compatible REST API and Deepgram-compatible WebSocket protocol | Quality-assurance scorecards with the ability to listen to audio and add manager commentary |
| Integrations | Multiple ASR backends (Whisper variants, Voxtral, Qwen3-ASR) and 200+ language support with translation | Sentiment analysis plus topic-frequency and trend reporting across interactions |
| Languages & capture | Included customizable HTML/JavaScript web interface and Docker images (GPU and CPU) | Next-action coaching recommendations that convert QA findings into roleplay simulations |
| Best-fit workflow | Voice activity detection and multi-user support on a single backend | Nightly batch processing so insights are ready the following day |
WhisperLiveKit
Choose WhisperLiveKit if you need self-hosted real-time meeting transcription with speaker labels — strengths include fully open source (apache 2.0) and self-hostable for private, on-premise transcription.
Zenarate
Choose Zenarate if you need automating contact-center qa by transcribing and scoring every agent call instead of manual sampling — strengths include analyzes up to 100% of calls instead of a small manual qa sample, with automatic transcription and redaction.
WhisperLiveKit
Zenarate
It depends on your workflow. WhisperLiveKit is strong for self-hosted real-time meeting transcription with speaker labels, while Zenarate is strong for automating contact-center qa by transcribing and scoring every agent call instead of manual sampling. Both transcribe and summarize meetings.
WhisperLiveKit is a free tier with paid upgrades and Zenarate is custom pricing. Check each vendor's pricing page for the latest plans and free-tier limits.
Often yes: teams combine tools when one handles capture and another handles analysis.
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