The ultimate tool to interact
with your audience.

Claper turns your presentations into an interactive, engaging and exciting experience.

It's time for your presentations to become more than just a bunch of slides.

#1 open-source presentation software

Try Claper yourself !

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Everything for a successful experience


Give your audience a voice with instant messaging, useful for your Q&A or anything else.


Create interactive polls with live results on the big screen.


Create forms to collect information from your audience.

Web content

You can embed Youtube video, Slideshare or any other web content with an iframe.

Moderation tools

Moderate user messages so you can focus on your presentation.


Add facilitators to your presentation to help you interacting with your audience.


Claper is translated into several languages thanks to our community. ๐Ÿ‡ฌ๐Ÿ‡ง, ๐Ÿ‡ซ๐Ÿ‡ท, ๐Ÿ‡ฉ๐Ÿ‡ช, ๐Ÿ‡ช๐Ÿ‡ธ, ๐Ÿ‡ณ๐Ÿ‡ฑ are currently supported.


Get detailed reports such as engagement rates throughout your presentation.

...and more like PDF/PPT support and pinned messages.

Trusted across industries

Claper is used by many people and organizations all over the world.



Engage students with interactive lessons and real-time feedback.

Bring Claper to your LMS (Moodle, Canvas, Blackboard, etc.) and start engaging students in a new way.

Corporate meeting

Corporate meeting

Boost engagement in meetings and training sessions.

Events and conferences

Events & Conferences

Create memorable experiences with audience participation.

2200+ speakers are using Claper

You have your place here. Just tweet about Claper or send us a love message!

โ€œClaper is so useful for our company, our teams are located all around the globe, and we can easily use it to make interactive presentation.โ€


โ€œAs a speaker, Claper is a new way to connect to my audience and collect valuable feedbacks.โ€


โ€œSimple and effective, Claper is more than enough to animate my talk shows!โ€


โ€œWe use Claper on our server to host our events with hundred of attendees.โ€


โ€œClaper is the only open-source project I found to make my presentation alive.โ€


โ€œAs an educator, Claper has been a game-changer. My students are more interactive and attentive than ever.โ€

Professor Johnson

Start for free. Upgrade for more.

Start creating an interactive presentation for free. Upgrade to empower your talks, unlock additional features and support our mission.



  • Up to 25 attendees
  • 5MB presentation file (PDF/PPT)
  • Unlimited questions
  • Unlimited polls
  • Export forms to CSV
  • Event report



  • Up to 100 attendees
  • 30MB presentation file (PDF/PPT)
  • Unlimited questions
  • Unlimited polls
  • Export forms to CSV
  • Event report



  • Up to 200 attendees
  • 100MB presentation file (PDF/PPT)
  • Unlimited questions
  • Unlimited polls
  • Export forms to CSV
  • Event report


Contact us

  • Customized features
  • Dedicated support
  • Flexible pricing
  • LTI support

Your questions, answered

Have another question? Contact us by email.

Can I self-host Claper on my server ?
Yes. Claper is open-source and you can host it on your own server using Docker or doing a manual installation.
Can I use it for free ?
Yes. You can use Claper for free with a limited number of attendees.
How many attendees can I have ?
With the free plan, you can have up to 25 attendees. If you need more, you can upgrade your plan to go up to 200 attendees.
How Claper is different from other tools ?
Claper is a free and open-source project. You can use it for free and host it on your own server. Claper is also a community, we are listening to your feedbacks and we are always improving the platform.
Can I get a refund ?
Yes. You can ask for a refund within 7 days after your purchase through the chat support.
For what kind of events can I use Claper ?
Claper is perfect for any kind of events: conferences, meetups, workshops, etc. even if it's more suitable for physical events.