Claper
Claper turns your slides into live, two-way conversations. Run polls, collect questions, and read the room – all without forcing your audience to install anything.
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Open-source interactive presentation tool for real-time audience participation via polls, Q&A, and reactions.
Core Features
- Live polls with multiple choice, open text, and rating scales
- Q&A wall with anonymous submissions and upvoting
- Emoji reactions (like, confused, speed up) for instant mood check
- No app install for attendees – just scan a QR code
- Self-hosted for full data privacy and customization
What It Can't Do
- •Default database is SQLite – switch to PostgreSQL for large-scale events. 2. HTTPS is required for browser to allow mic/camera permissions. 3. For audiences above 1000, consider scaling horizontally. 4. Unlike Slido, Claper lacks a native PowerPoint/Google Slides add-in – you'll need to alt-tab or use a second screen. 5. WebSocket-based realtime may break on unreliable networks; use a stable connection.
Use Cases
- Town hall meetings: anonymous polls to gauge true employee sentiment
- University lectures: audience-driven Q&A with ranked voting
- Online workshops: instant quizzes to check comprehension
- Product launches: real-time feedback on features and messaging
Claper is an open-source tool that transforms static presentations into live, interactive sessions. It allows presenters to collect real-time feedback, run polls, accept questions, and gauge audience sentiment – all without requiring attendees to install any app. Built with Phoenix and Elixir, Claper offers exceptional real-time performance and scalability. It supports multiple languages (English, French, German, Spanish, Dutch, Italian, Hungarian, Latvian) and can be self-hosted for full data control. Whether you're giving a conference talk, a classroom lecture, or a corporate meeting, Claper helps you keep your audience engaged and make them active participants.
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Getting Started
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Install the software
Double-click the downloaded installer and follow the prompts
Step 1: Deploy with Docker (easiest): docker run -d -p 4000:4000 claper/claper
Step 2: Open http://localhost:4000, create a presentation and set a title
Step 3: Share the room code or QR code; attendees join and start interacting
- Step 1: Deploy with Docker (easiest): docker run -d -p 4000:4000 claper/claper
- Step 2: Open http://localhost:4000, create a presentation and set a title
- Step 3: Share the room code or QR code; attendees join and start interacting
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Open Source Transparency
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Stop the container with docker stop <container-id> and remove the image with docker rmi claper/claper. For manual installations, delete the project folder and database files.
No Extra Dependencies
Ready to use after download. No additional runtime required.
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