The Amazon and Whole Foods deal could pave the way for broad adoption of machine learning in grocery retail.
Called the Open Academic Search project, the goal is to aid researchers by having the companies, institutes and nonprofits involved make their AI and analysis tools open-source.
At $9 billion, buying Slack would be Amazon's biggest acquisition.
A deal could give San Francisco-based Slack a valuation of at least $9 billion, the people said.
A certification program for Cloud Foundry announced in March is now publicly available.