Knovvu Analytics (SESTEK): Knovvu Analytics by SESTEK is an enterprise speech-and-text analytics platform that transcribes and analyzes 100% of customer voice and digital interactions for contact centers. Letterly: Letterly is a multilingual AI speech-to-text app that turns dictated speech into polished notes, emails, summaries, and meeting transcripts across iOS, Android, Mac, Windows, and Web. Below, they line up on price, capture method, and how each fits a real meeting stack.
How Hosiqo compares and tests toolsFinal recommendation
Shortlist Knovvu Analytics (SESTEK) when transcribing and analyzing 100% of customer service calls to surface trends and root causes matters most, and Letterly when transcribing and summarizing meetings or interviews with speaker separation matters most. Trial each on a few real meetings before you commit — the better fit usually shows fast.
Knovvu Analytics by SESTEK is an enterprise speech-and-text analytics platform that transcribes and analyzes 100% of customer voice and digital interactions for contact centers.
Letterly is a multilingual AI speech-to-text app that turns dictated speech into polished notes, emails, summaries, and meeting transcripts across iOS, Android, Mac, Windows, and Web.
Knovvu Analytics is the conversational analytics product from SESTEK, a conversational-automation company with over 20 years of experience that is now part of UNIFONIC. It captures contact-center interactions and uses SESTEK's own speech recognition engine (reported >97% accuracy) to transcribe voice calls into text, then applies AI to analyze conversations at scale. Core capabilities include speaker diarization, multilingual identification, automatic topic categorization, sentiment analysis, and root-cause discovery across thousands of voice- and text-based interactions. Real-time features detect prohibited words, urgent inquiries, and compliance issues, sending instant supervisor notifications and API-triggered actions. It pairs with SESTEK's Automated Quality Management for objective agent scoring and script-adherence monitoring. The platform integrates with contact-center systems such as Five9, Genesys, and Avaya, and offers HTTP/REST, MRCP, and WebSocket integration methods. Its containerized architecture supports both cloud and on-premises deployment. It is built for enterprise contact centers in banking, insurance, telecom, and e-commerce, serving customers including ING Bank, DHL, Vodafone, and Carrefour.
Best suited for
Letterly is a voice-to-text application that converts spoken words into clean, structured written text. Aimed at professionals, students, content creators, and anyone who prefers talking to typing, it lets users record speech directly in the app or dictate into other apps, then automatically transcribes the audio. Beyond raw transcription, Letterly applies AI rewriting so a single recording can become an email, a summary, a social post, a task list, a journal entry, or a meeting recap, using preset styles or custom instructions. It automatically detects and transcribes a wide range of languages and can handle mid-sentence language switching. For meetings and interviews, it offers speaker separation and can generate summaries from a recording. The app supports extended recordings, offline and screen-off dictation, quick-record widgets, and live sync across devices, including Apple Watch. It also integrates with external tools via Zapier and webhooks. Letterly states that user data is kept private and not used to train AI models. It runs on iOS, Android, Mac, Windows, and Web.
Best suited for
Knovvu Analytics (SESTEK) is custom pricing (contact sales); Letterly is a free tier with paid upgrades (freemium). Always confirm current pricing on each vendor's site before buying.
| Feature | Knovvu Analytics (SESTEK) | Letterly |
|---|---|---|
| Core capability | Speech-to-text transcription of voice interactions with reported >97% accuracy | Automatic speech-to-text transcription of recorded or dictated audio |
| Standout feature | Speaker diarization and multilingual speaker identification | AI rewriting into multiple formats (emails, summaries, posts, task lists, journal entries) |
| Team usage | AI-driven sentiment analysis and emotion detection | Multilingual transcription with automatic language detection and mid-sentence switching |
| Integrations | Automatic topic categorization and trend/root-cause analysis | Meeting/interview support with speaker separation and summary generation |
| Languages & capture | Real-time alerts for prohibited words, urgent inquiries, and compliance issues | Offline and screen-off recording, plus quick-record widget and Apple Watch dictation |
| Best-fit workflow | Automated quality management with objective agent scoring and script-adherence monitoring | Cross-device sync and integrations via Zapier and webhooks |
Knovvu Analytics (SESTEK)
Choose Knovvu Analytics (SESTEK) if you need transcribing and analyzing 100% of customer service calls to surface trends and root causes — strengths include analyzes 100% of interactions rather than a sampled subset.
Letterly
Choose Letterly if you need dictating and polishing emails, messages, and notes faster than typing — strengths include broad multilingual coverage with automatic language detection.
Knovvu Analytics (SESTEK)
Letterly
It depends on your workflow. Knovvu Analytics (SESTEK) is strong for transcribing and analyzing 100% of customer service calls to surface trends and root causes, while Letterly is strong for dictating and polishing emails, messages, and notes faster than typing. Both transcribe and summarize meetings.
Knovvu Analytics (SESTEK) is custom pricing and Letterly 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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