7 startups in the database position themselves against Slack. "Alternative to" is read from each company's own site or set by the founder; the metrics next to each are measured, not claimed.
All-in-one productivity software for teams and individuals maximizing efficiency
All-in-one business management software for SMBs with connected modules
GitHub, Vercel, and Netlify alerts to Telegram for developers
Building apps, working with AI agents, and teaching others how to ship
Real-time backend updates on iPhone lock screens for teams
AI chief of staff for executives to manage priorities and tasks
WhatsApp reminders and accountability coach for busy people
Railway
