Teleprompter Lab

A private comparison page for testing three open-source voice teleprompters before deciding what to bring into Content-MCP.

Built for Content-MCP
July 11, 2026
Speech API Checking
On-device flag Checking
Language pack Not checked
Microphone Not tested

Test Script

Open Speech Diagnostics

Open each candidate in a new tab, paste this script, then test voice follow, manual controls, mirror mode, and whether it survives going off-script.

What To Score

CriterionWhy it matters
Voice follow accuracyDoes it recover after pauses, filler, and misreads?
Local-only confidenceCan it require native on-device recognition, or does it just use Web Speech?
Integration shapeCan the useful parts be moved into Content-MCP without importing a whole product?
Filming controlsMirror, font size, scroll position, keyboard controls, fullscreen.
Maintenance riskBuild health, dependencies, license, and amount of unrelated code.

Candidates

wlphi/prompter

Smallest and most directly useful candidate. Browser speech mode plus a Vosk path for genuinely offline recognition.

Static frontend Web Speech Vosk option
Open Test GitHub

jlecomte/voice-activated-teleprompter

React/Vite app focused on automatic scroll while reading. Good benchmark for matching robustness and prompter ergonomics.

React Redux Chrome-tested
Open Test GitHub

kosuvorov/VoicePrompter

Full product-style PWA with voice control, camera recording, script history, mirror mode, and mobile-oriented UX.

PWA Recording Large codebase
Open Test GitHub

Initial Notes

Candidate Best reason to use Risk to watch
wlphi/prompter Closest to a reusable implementation, including an offline Vosk route. Vosk mode needs model/server decisions if you want it inside Content-MCP.
jlecomte Simple voice-follow teleprompter UX, useful as a matching benchmark. Source build is currently incomplete in the cloned repo because root index.html is missing; the shipped dist/ works.
kosuvorov Most complete user-facing product and mobile/PWA experience. Much larger surface area, includes marketing pages and tracking in upstream build; copied analytics scripts were stripped here.