Now in Public Beta
The Open Source Slack Alternative Your Team Will Actually Love
Open-source, lightning-fast, and designed for modern collaboration. Hazel brings your team's conversations, tools, and workflows into one beautiful interface.
Integrated with the best tools
Built for Modern Teams
Everything you need to collaborate effectively, all in one place.
What did the team decide about the real-time sync approach last week?
Real-Time Chat with AI
Instant messaging with built-in AI agents. Get answers, automate tasks, and keep conversations flowing seamlessly.
Powerful Integrations
Connect the tools you already use. GitHub, Linear, Railway, and more—all in one place.
Scale With Your Needs
From small teams to large organizations. Hazel grows with you—handle more channels, more messages, more users.
Work Across Time Zones
Built for remote teams. See who's online, coordinate across time zones, and never miss an important message.
Core Features
Everything you need to collaborate effectively.
Keep Every Conversation Connected
Seamlessly sync messages, threads, and reactions between Discord, Slack, and Hazel.
Message Sync
Every message syncs instantly. Edit in Discord, see it update in Hazel. Reply from Slack, your team sees it everywhere.
Thread Continuity
Threaded conversations stay connected. Start a thread in Slack, continue it in Hazel with full context preserved.
Reaction Sync
Reactions travel across platforms. React with an emoji in Discord, it appears in Hazel and Slack instantly.
Built for Secure Growth
Where advanced security meets seamless scalability—designed to protect your data and empower your growth.
Security and Privacy
Hazel is built with security and privacy in mind. Your data is protected with enterprise-grade authentication and fine-grained permissions.
Scalable for any Team
Grow with your team. Collaborate across hundreds of channels and stay in sync with all your team members.
"Hazel has been an amazing upgrade for our workflow, allowing us to escape the clutches of Slack and easily integrate our network of coaches, partners and AI agents into it, which made it easy to scale our business without the cost burdens that come with it."
Free while in beta
Hazel is free for everyone during the beta. Paid plans coming soon.
Free
Everything you need to get started
- Unlimited team members
- Unlimited channels & messages
- GitHub integration
- Desktop & web app
- Full-text message search
- Community support
Loved by developers worldwide
Join thousands of teams who have made Hazel their home for collaboration.
Engineering Lead at Nextera
We switched from Slack to Hazel and never looked back. The GitHub integration is native, not bolted on.PR reviews happen right in our team channels now. Exactly what a dev team needs.
Product Manager at Foldwise
Hazel's keyboard-first design means I barely touch my mouse anymore. The command palette is incredible.I can jump to any channel or person in under a second. My team is noticeably faster.
Founder & CTO at Layerform
As a startup, we needed a chat tool that wouldn't slow us down or drain our budget. Hazel is free, open source, and fast.Our team onboarded in minutes. Essential for any early-stage team.
DevOps Engineer at Infrastack
The Railway and deployment integrations mean I see build statuses right in Hazel.No more context-switching between dashboards. It's like having a command center for our infrastructure.
Senior Developer at Quantbase
The inline code highlighting and markdown support make technical discussions so much better.Sharing code snippets in Hazel feels natural, not like a workaround. Finally, a chat built for developers.
VP of Engineering at Corelight
We manage 40+ engineers across 3 time zones. Hazel's real-time presence and fast search keep everyone in sync.It scales beautifully without the Slack pricing shock.
Engineering Lead at Nextera
We switched from Slack to Hazel and never looked back. The GitHub integration is native, not bolted on.PR reviews happen right in our team channels now. Exactly what a dev team needs.
Product Manager at Foldwise
Hazel's keyboard-first design means I barely touch my mouse anymore. The command palette is incredible.I can jump to any channel or person in under a second. My team is noticeably faster.
Founder & CTO at Layerform
As a startup, we needed a chat tool that wouldn't slow us down or drain our budget. Hazel is free, open source, and fast.Our team onboarded in minutes. Essential for any early-stage team.
DevOps Engineer at Infrastack
The Railway and deployment integrations mean I see build statuses right in Hazel.No more context-switching between dashboards. It's like having a command center for our infrastructure.
Senior Developer at Quantbase
The inline code highlighting and markdown support make technical discussions so much better.Sharing code snippets in Hazel feels natural, not like a workaround. Finally, a chat built for developers.
VP of Engineering at Corelight
We manage 40+ engineers across 3 time zones. Hazel's real-time presence and fast search keep everyone in sync.It scales beautifully without the Slack pricing shock.
Engineering Lead at Nextera
We switched from Slack to Hazel and never looked back. The GitHub integration is native, not bolted on.PR reviews happen right in our team channels now. Exactly what a dev team needs.
Product Manager at Foldwise
Hazel's keyboard-first design means I barely touch my mouse anymore. The command palette is incredible.I can jump to any channel or person in under a second. My team is noticeably faster.
Founder & CTO at Layerform
As a startup, we needed a chat tool that wouldn't slow us down or drain our budget. Hazel is free, open source, and fast.Our team onboarded in minutes. Essential for any early-stage team.
DevOps Engineer at Infrastack
The Railway and deployment integrations mean I see build statuses right in Hazel.No more context-switching between dashboards. It's like having a command center for our infrastructure.
Senior Developer at Quantbase
The inline code highlighting and markdown support make technical discussions so much better.Sharing code snippets in Hazel feels natural, not like a workaround. Finally, a chat built for developers.
VP of Engineering at Corelight
We manage 40+ engineers across 3 time zones. Hazel's real-time presence and fast search keep everyone in sync.It scales beautifully without the Slack pricing shock.
Engineering Lead at Nextera
We switched from Slack to Hazel and never looked back. The GitHub integration is native, not bolted on.PR reviews happen right in our team channels now. Exactly what a dev team needs.
Product Manager at Foldwise
Hazel's keyboard-first design means I barely touch my mouse anymore. The command palette is incredible.I can jump to any channel or person in under a second. My team is noticeably faster.
Founder & CTO at Layerform
As a startup, we needed a chat tool that wouldn't slow us down or drain our budget. Hazel is free, open source, and fast.Our team onboarded in minutes. Essential for any early-stage team.
DevOps Engineer at Infrastack
The Railway and deployment integrations mean I see build statuses right in Hazel.No more context-switching between dashboards. It's like having a command center for our infrastructure.
Senior Developer at Quantbase
The inline code highlighting and markdown support make technical discussions so much better.Sharing code snippets in Hazel feels natural, not like a workaround. Finally, a chat built for developers.
VP of Engineering at Corelight
We manage 40+ engineers across 3 time zones. Hazel's real-time presence and fast search keep everyone in sync.It scales beautifully without the Slack pricing shock.
Head of Platform at Greenfield Labs
The fact that Hazel is open source means we can audit the code and contribute back. That trust factor is huge for us.Transparency isn't just a feature, it's the foundation. Love what this team is building.
Design Lead at Motionkit
As a designer, I care about the small details. Hazel's UI is clean, fast, and doesn't get in the way.It's the first chat app that feels thoughtfully designed. Even file sharing and media previews are polished.
Director of Engineering at Healthpilot
We needed a solution with strong security and SSO support. Hazel delivered with WorkOS integration out of the box.Enterprise-grade auth without enterprise-grade complexity. Perfect for regulated industries.
CEO at DevRel Studio
Hazel's Linear integration shows issue previews right in chat. Our sprint planning conversations are so much richer now.Context without context-switching. It's changed how our team coordinates.
CTO at Stackpulse
The desktop app with auto-updates and native notifications is a game-changer. It feels like a first-class citizen, not an Electron afterthought.Fast, reliable, and always up to date. Our devs love it.
Engineering Manager at Createflow
We built custom bots using Hazel's webhook API to automate our release notes and deploy notifications.The extensibility is exactly what power users want. It fits our workflow like a glove.
Founder at Launchpad
Moving from Discord to Hazel gave us a professional team space without losing the developer-friendly vibe.It's the sweet spot between Slack and Discord. Exactly what our open source community needed.
Head of Platform at Greenfield Labs
The fact that Hazel is open source means we can audit the code and contribute back. That trust factor is huge for us.Transparency isn't just a feature, it's the foundation. Love what this team is building.
Design Lead at Motionkit
As a designer, I care about the small details. Hazel's UI is clean, fast, and doesn't get in the way.It's the first chat app that feels thoughtfully designed. Even file sharing and media previews are polished.
Director of Engineering at Healthpilot
We needed a solution with strong security and SSO support. Hazel delivered with WorkOS integration out of the box.Enterprise-grade auth without enterprise-grade complexity. Perfect for regulated industries.
CEO at DevRel Studio
Hazel's Linear integration shows issue previews right in chat. Our sprint planning conversations are so much richer now.Context without context-switching. It's changed how our team coordinates.
CTO at Stackpulse
The desktop app with auto-updates and native notifications is a game-changer. It feels like a first-class citizen, not an Electron afterthought.Fast, reliable, and always up to date. Our devs love it.
Engineering Manager at Createflow
We built custom bots using Hazel's webhook API to automate our release notes and deploy notifications.The extensibility is exactly what power users want. It fits our workflow like a glove.
Founder at Launchpad
Moving from Discord to Hazel gave us a professional team space without losing the developer-friendly vibe.It's the sweet spot between Slack and Discord. Exactly what our open source community needed.
Head of Platform at Greenfield Labs
The fact that Hazel is open source means we can audit the code and contribute back. That trust factor is huge for us.Transparency isn't just a feature, it's the foundation. Love what this team is building.
Design Lead at Motionkit
As a designer, I care about the small details. Hazel's UI is clean, fast, and doesn't get in the way.It's the first chat app that feels thoughtfully designed. Even file sharing and media previews are polished.
Director of Engineering at Healthpilot
We needed a solution with strong security and SSO support. Hazel delivered with WorkOS integration out of the box.Enterprise-grade auth without enterprise-grade complexity. Perfect for regulated industries.
CEO at DevRel Studio
Hazel's Linear integration shows issue previews right in chat. Our sprint planning conversations are so much richer now.Context without context-switching. It's changed how our team coordinates.
CTO at Stackpulse
The desktop app with auto-updates and native notifications is a game-changer. It feels like a first-class citizen, not an Electron afterthought.Fast, reliable, and always up to date. Our devs love it.
Engineering Manager at Createflow
We built custom bots using Hazel's webhook API to automate our release notes and deploy notifications.The extensibility is exactly what power users want. It fits our workflow like a glove.
Founder at Launchpad
Moving from Discord to Hazel gave us a professional team space without losing the developer-friendly vibe.It's the sweet spot between Slack and Discord. Exactly what our open source community needed.
Head of Platform at Greenfield Labs
The fact that Hazel is open source means we can audit the code and contribute back. That trust factor is huge for us.Transparency isn't just a feature, it's the foundation. Love what this team is building.
Design Lead at Motionkit
As a designer, I care about the small details. Hazel's UI is clean, fast, and doesn't get in the way.It's the first chat app that feels thoughtfully designed. Even file sharing and media previews are polished.
Director of Engineering at Healthpilot
We needed a solution with strong security and SSO support. Hazel delivered with WorkOS integration out of the box.Enterprise-grade auth without enterprise-grade complexity. Perfect for regulated industries.
CEO at DevRel Studio
Hazel's Linear integration shows issue previews right in chat. Our sprint planning conversations are so much richer now.Context without context-switching. It's changed how our team coordinates.
CTO at Stackpulse
The desktop app with auto-updates and native notifications is a game-changer. It feels like a first-class citizen, not an Electron afterthought.Fast, reliable, and always up to date. Our devs love it.
Engineering Manager at Createflow
We built custom bots using Hazel's webhook API to automate our release notes and deploy notifications.The extensibility is exactly what power users want. It fits our workflow like a glove.
Founder at Launchpad
Moving from Discord to Hazel gave us a professional team space without losing the developer-friendly vibe.It's the sweet spot between Slack and Discord. Exactly what our open source community needed.
Frequently Asked Questions
Answers to common questions about Hazel and its features. If you have any other questions, please don't hesitate to contact us.
What is Hazel?
How is Hazel different from Slack?
What integrations does Hazel support?
Does Hazel have a desktop app?
Is Hazel free for small teams?
Can I search messages in Hazel?
Can I self-host Hazel?
Does Hazel support threads and message replies?
How does Hazel compare to Microsoft Teams?
Is Hazel GDPR compliant?
