Slack is a leading team collaboration platform founded in San Francisco in 2013 and acquired by Salesforce for USD 27.7 billion in 2021, with 30 million+ daily active users, known for channel-based communication, 7500+ app integrations, and powerful search.
Slite is a team knowledge base and document collaboration tool founded in Paris, France in 2015, known for its simple editor and AI Q&A, positioned as a "lightweight Notion". A free plan is available, Pro costs about $8 per member per month, and it suits small and mid-size teams consolidating knowledge.