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Spark IM

Cross-platform XMPP instant messaging client

Team Chat ★ 607 stars Easy setup Apache-2.0

Spark is a full-featured, cross-platform XMPP instant messaging client with group chat, file transfer, and strong support for the Openfire server. It is aimed at organizations running their own chat infrastructure.

Official siteSource code

Key features

  • XMPP desktop client
  • Group chat and file transfer
  • Tight Openfire integration
  • Cross-platform

Strengths

  • Released under the Apache-2.0 license
  • Easy to set up — beginner-friendly
  • Written in Java
  • Tiny footprint — runs in 256 MB RAM

Is Spark IM secure?

OSV.dev has no published security advisories for Spark IM'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.

Spark IM replaces

Self-hosted Slack alternativesSelf-hosted Skype alternatives

Health badge

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SelfHostIndex: 61 · good

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Compare Spark IM

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