Slack is a widely-used messaging and collaboration platform designed to streamline communication within teams and organizations. It offers a range of features to enhance productivity, such as channels for topic-focused discussions, direct messaging for one-on-one interactions, and the ability to integrate with various third-party applications like Google Drive, Trello, and GitHub. For application developers, Slack provides a robust API and customizable bots that can automate workflows, manage notifications, and facilitate DevOps processes. Developers can leverage Slack’s integration capabilities to receive real-time updates on code deployments, server statuses, and bug reports, promoting a more seamless and efficient development cycle. By centralizing communication and integrating easily with existing tools, Slack helps developers maintain transparency, reduce email dependency, and enhance cross-functional collaboration in agile environments.
View the most prominent open source Slack projects in the list below. Click on a specific project to view its alternative or complementary packages. Make comparisons and find the best package for your app.
- The easy-to-use open source Business Intelligence and Embedded Analytics tool that lets everyone work with data☆49,700Updated this week
- The Secure CommsOS™ for mission-critical operations☆46,273Updated this week
- The fastest knowledge base for growing teams. Beautiful, realtime collaborative, feature packed, and markdown compatible.☆40,900Updated this week
- Zulip server and web application. Open-source team chat that helps teams stay productive and focused.☆26,055Updated this week
- Open source agentic operating system☆19,611Updated this week
- Weekly Go Online Meetup via Bilibili|Go 夜读|通过 bilibili 在线直播的方式分享 Go 相关的技术话题,每天大家在微信/telegram/Slack 上及时沟通交流编程技术话题。☆12,281Sep 15, 2026Updated last month
- Botkit is an open source developer tool for building chat bots, apps and custom integrations for major messaging platforms.☆11,582Jul 1, 2024Updated 2 years ago
- Automated developer-oriented status page with alerting and incident support☆12,325Oct 7, 2026Updated last week
- Build your own AI SRE agents. The open source toolkit for the AI era.☆11,992Updated this week
- Prometheus Alertmanager☆8,658Updated this week
- bridge between mattermost, IRC, gitter, xmpp, slack, discord, telegram, rocketchat, twitch, ssh-chat, zulip, whatsapp, keybase, matrix, m…☆7,586Dec 12, 2024Updated last year
- The first open-source agent skills builder. Define skills by vibe workflow, run on Claude Code, Cursor, Codex & more. Build Clawdbot 🦞· …☆7,537Jul 29, 2026Updated 2 months ago
- Slack client for your terminal☆6,614Apr 23, 2024Updated 2 years ago
- Free and Open Source messaging and emailing app that combines common web applications into one.☆6,379Apr 21, 2022Updated 4 years ago
- Open-source live customer chat☆6,116Feb 15, 2024Updated 2 years ago
- 🎨 themer takes a set of colors and outputs themes for your apps (editors, terminals, wallpapers, and more).☆5,858Jun 27, 2026Updated 3 months ago
- Open-source and local-first Slack and Notion alternative that puts you in control of your data☆5,167Apr 3, 2026Updated 6 months ago
- Slack API in Go☆4,971Oct 4, 2026Updated last week
- Easy full stack backup operations on UNIX-like systems.☆4,856Jul 3, 2024Updated 2 years ago
- Receive notifications when an image is updated on a Docker registry☆4,974Updated this week
- Franz is a free messaging app for services like WhatsApp, Slack, Messenger and many more.☆4,727Jun 12, 2026Updated 4 months ago
- ⚡️ A framework for building conversational user interfaces.☆4,280Apr 10, 2024Updated 2 years ago
- A large model-based chatbot builder that can quickly integrate AI models (including ChatGPT, Claude, Gemini) into various software applic…☆4,219Jul 5, 2026Updated 3 months ago
- The most awesome list about bots ⭐️🤖☆4,193Jul 3, 2024Updated 2 years ago
- The devs are over here at devzat, chat over SSH!☆4,075Jul 23, 2026Updated 2 months ago
- Slack Developer Kit for Python☆4,016Updated this week
- The Pokemon Go Bot, baking with community.☆3,926Dec 7, 2023Updated 2 years ago
- Developer-friendly incident response with brilliant Slack integration☆3,883Mar 24, 2026Updated 6 months ago
- ✨ A beautiful dark theme for your favorite apps.☆3,825Dec 20, 2025Updated 9 months ago
- A dead simple Go library for sending notifications to various messaging services.☆3,915Updated this week
- Next generation noIM application in your own workspace, not only another Slack/Discord/Rocket.chat☆3,639Oct 2, 2026Updated 2 weeks ago
- Slack Developer Kit for Node.js☆3,379Updated this week
- The simplest desktop client for OpenClaw 🦞 — bridge your Agent to WeChat, Feishu, Slack & Discord in one click. Works with Claude Code, …☆3,282Apr 26, 2026Updated 5 months ago
- Better Prometheus alerts for Kubernetes - smart grouping, AI enrichment, and automatic remediation☆3,116Updated this week
- The open-source context layer for AI agents. PipesHub turns your company's knowledge (Slack, Drive, Jira, GitHub, Microsoft 365 and 40+ c…☆3,837Updated this week
- A framework to build Slack apps using JavaScript☆2,948Oct 9, 2026Updated last week
- SRE Agent - CNCF Sandbox Project☆3,613Updated this week
- Lightweight Google-searchable Slack alternative for Communities☆2,776Dec 9, 2024Updated last year
- Save or export your private and public Slack messages, threads, files, and users locally without admin privileges.☆2,830Updated this week