Free tier with paid premium features
Freemium is a pricing strategy where the core product is free and premium features, capacity, or access are offered at a cost. It's a powerful acquisition tool but requires careful design — too generous and no one upgrades; too limited and no one stays.
Slack's free tier limits message history to 90 days and integrations to 10. Teams hit those limits and upgrade to paid — a classic freemium conversion trigger.