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☆46,406Updated this week
- The Secure CommsOS™ for mission-critical operations☆44,873Updated this week
- The fastest knowledge base for growing teams. Beautiful, realtime collaborative, feature packed, and markdown compatible.☆37,593Updated this week
- Zulip server and web application. Open-source team chat that helps teams stay productive and focused.☆24,863Updated this week
- Autonomous agents for everyone☆17,819Updated this week
- Open source alternative to NotebookLM for teams. Join our Discord: https://discord.gg/ejRNvftDp9☆13,246Mar 12, 2026Updated last week
- dbt enables data analysts and engineers to transform their data using the same practices that software engineers use to build application…☆12,398Updated 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。☆12,301Mar 10, 2026Updated last week
- Botkit is an open source developer tool for building chat bots, apps and custom integrations for major messaging platforms.☆11,583Jul 1, 2024Updated last year
- Automated developer-oriented status page with alerting and incident support☆10,386Mar 6, 2026Updated 2 weeks ago
- Prometheus Alertmanager☆8,390Updated this week
- bridge between mattermost, IRC, gitter, xmpp, slack, discord, telegram, rocketchat, twitch, ssh-chat, zulip, whatsapp, keybase, matrix, m…☆7,406Dec 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 🦞· …☆6,980Updated this week
- Slack client for your terminal☆6,593Apr 23, 2024Updated last year
- Free and Open Source messaging and emailing app that combines common web applications into one.☆6,390Apr 21, 2022Updated 3 years ago
- Open-source live customer chat☆5,935Feb 15, 2024Updated 2 years ago
- 🎨 themer takes a set of colors and outputs themes for your apps (editors, terminals, wallpapers, and more).☆5,798Apr 15, 2025Updated 11 months ago
- Slack API in Go☆4,919Mar 7, 2026Updated last week
- Easy full stack backup operations on UNIX-like systems.☆4,876Jul 3, 2024Updated last year
- Franz is a free messaging app for services like WhatsApp, Slack, Messenger and many more.☆4,676Sep 24, 2025Updated 5 months ago
- Open-source and local-first Slack and Notion alternative that puts you in control of your data☆4,672Updated this week
- Receive notifications when an image is updated on a Docker registry☆4,501Updated this week
- ⚡️ A framework for building conversational user interfaces.☆4,279Apr 10, 2024Updated last year
- A large model-based chatbot builder that can quickly integrate AI models (including ChatGPT, Claude, Gemini) into various software applic…☆4,188Jan 3, 2025Updated last year
- The most awesome list about bots ⭐️🤖☆4,103Jul 3, 2024Updated last year
- The devs are over here at devzat, chat over SSH!☆4,019Feb 19, 2026Updated last month
- Slack Developer Kit for Python☆3,995Mar 12, 2026Updated last week
- The Pokemon Go Bot, baking with community.☆3,903Dec 7, 2023Updated 2 years ago
- Developer-friendly incident response with brilliant Slack integration☆3,880Updated this week
- ✨ A beautiful dark theme for your favorite apps.☆3,745Dec 20, 2025Updated 2 months ago
- A dead simple Go library for sending notifications to various messaging services.☆3,699Mar 10, 2026Updated last week
- Next generation noIM application in your own workspace, not only another Slack/Discord/Rocket.chat☆3,556Apr 12, 2025Updated 11 months ago
- Slack Developer Kit for Node.js☆3,361Mar 13, 2026Updated last week
- Better Prometheus alerts for Kubernetes - smart grouping, AI enrichment, and automatic remediation☆2,960Mar 12, 2026Updated last week
- A framework to build Slack apps using JavaScript☆2,895Mar 6, 2026Updated last week
- Lightweight Google-searchable Slack alternative for Communities☆2,782Dec 9, 2024Updated last year
- PipesHub is a fully extensible and explainable workplace AI platform for enterprise search and workflow automation☆2,712Updated this week
- All new design. Inspect your iOS application at runtime.☆2,576Oct 15, 2020Updated 5 years ago
- The best CLI client for Slack, because everything is terrible!☆2,478Dec 8, 2022Updated 3 years ago
- Save or export your private and public Slack messages, threads, files, and users locally without admin privileges.☆2,475Mar 9, 2026Updated last week