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Claper

The ultimate tool to interact with your audience (alternative

Calendar & Contacts ★ 812 stars Medium setup GPL-3.0

The ultimate tool to interact with your audience (alternative to Slido, AhaSlides and Mentimeter).

Official siteSource code

Strengths

  • Released under the GPL-3.0 license
  • First-class Docker support for quick deployment
  • Written in Elixir
  • Lightweight — runs in 512 MB RAM

Is Claper secure?

OSV.dev has no published security advisories for Claper's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

Health badge

Maintain Claper? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 81 · excellent

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[![SelfHostIndex health score for Claper](https://selfhostindex.com/badge/claper.svg)](https://selfhostindex.com/app/claper/)
HTML
<a href="https://selfhostindex.com/app/claper/"><img src="https://selfhostindex.com/badge/claper.svg" alt="SelfHostIndex health score for Claper"></a>
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.. image:: https://selfhostindex.com/badge/claper.svg
   :alt: SelfHostIndex health score for Claper
   :target: https://selfhostindex.com/app/claper/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

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