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Open Source Security & Monitoring Tools

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126 projects, sorted by GitHub stars.

repowise

Alternative toCodeScene

Codebase intelligence: MCP tools for agents, health scores for teams.

  • 7,869 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

Claude-Red

Alternative toNodeZero by Horizon3.ai

78 offensive security skills for Claude, drop-in and MIT licensed

  • 7,813 GitHub stars
  • MITLicence MIT

Standard Notes

Alternative toEvernote

End-to-end encrypted notes with 100+ extensions and themes

  • 6,672 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

CloudQuery

Alternative toWiz

Sync cloud assets from 150+ providers into your own SQL database

  • 6,544 GitHub stars
  • MPL-2.0Licence MPL-2.0

Waterfox

Alternative toBrave Browser

Privacy-focused browser engineered for speed and user control

  • 6,380 GitHub stars
  • MPL-2.0Licence MPL-2.0

Helicone

Alternative toArize AI

Monitor LLM spend and catch prompt anomalies in production

  • 6,228 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #LLMOps

Passbolt

Alternative to1Password

Open source team password manager with sharing and audit

  • 6,180 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Security

hister

Alternative toGlean

Private full-text search for your pages and files

  • 6,092 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

Unkey

Alternative toKong Konnect

Unified API keys, gateways, and observability for developers.

  • 5,471 GitHub stars
  • FSL-1.1-ALv2Licence FSL-1.1-ALv2

Kener

Alternative toAtlassian Statuspage

Open source status page built with SvelteKit and SQLite

  • 5,211 GitHub stars
  • MITLicence MIT
  • #Monitoring

MiroTalk

Alternative toZoom

Free browser-based video calls with no sign-up required

  • 4,800 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Chat

Matrix

Alternative toSlack

Open protocol for secure, decentralized messaging and VoIP

  • 4,716 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Chat
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