15 Best Slack Communities for Startups

Let's be honest - most startup Slack communities are ghost towns filled with self-promotion and crickets. But hidden among them are some genuinely valuable communities where real founders share actual insights, help each other solve problems, and build meaningful connections.

After spending countless hours in dozens of startup-focused groups (and leaving most of them), I've found the ones that actually deliver value beyond the usual "nice to meet you" exchanges. These are communities where founders openly discuss their failures, share their metrics, and help each other navigate the messy reality of building a company.

What makes these communities different? They're not just about networking - they're about real problem-solving. You'll find CTOs sharing their technical architecture decisions, founders discussing their cap table headaches, and marketers revealing their actual campaign numbers. No sugar coating, just honest conversations about what works and what doesn't.

Let's dive into the communities that can actually help move your startup forward.

Must-Join Slack Communities for Startup Founders

• Startup Study Group (SSG) - One of the largest startup Slack communities with over 10,000 members, featuring daily discussions on growth, funding, and operational challenges.
• Demand Curve - A growth-focused Slack community tied to their growth training program, sharing detailed marketing tactics and case studies.
• SaaS Growth Hacks - A community specifically for SaaS founders to discuss metrics, pricing strategies, and customer acquisition.
• Startup School - Y Combinator's official Slack community for startup founders, offering access to resources and conversations with YC alumni.
• WomenInTech - An active Slack space focused on supporting women in startups and tech, with channels for founders, engineers, and product managers.
• Heavybit - A community focused on developer-focused startups and technical founders, with discussions about building developer tools and platforms.
• Product School - While primarily focused on product management, this Slack community has active channels for startup founders and product-led growth.
• Stripe Atlas - Official community for Stripe Atlas members, with valuable discussions about startup formation, banking, and financial operations.
• Remote Teams - A Slack community focused on building and managing remote startup teams, sharing best practices and tools.
• DevTo Founders - A technical founder-focused Slack community that discusses both engineering and business challenges.

Pro Tip: Don't try to be active in all these communities at once. Pick 2-3 that align with your current challenges and focus on building meaningful connections there.