Salesforce Tightens Slack’s API Rules

Salesforce Tightens Slack’s API Rules, Restricting AI Data Access

Salesforce, the parent company of workplace messaging platform Slack, has quietly updated its API terms to block third-party software firms from indexing or storing Slack messages—a move that could significantly impact enterprise AI tools.

According to a report from The Information, the changes prevent apps like Glean (a workplace AI search provider) from accessing Slack data for long-term storage or analysis. In a statement to Reuters, Salesforce framed the shift as a data security measure, saying:

“As AI raises critical considerations around how customer data is handled, we’re reinforcing safeguards around how data accessed via Slack APIs can be stored, used, and shared.”

What Does This Actually Mean?

APIs (Application Programming Interfaces) allow different software systems to communicate. Until now, companies could use Slack’s API to:

Index messages for search (like Glean’s AI-powered workplace search).
Store data for analytics or AI training.
Integrate Slack with other enterprise tools.

Now, those capabilities are restricted. Third-party apps can still access Slack data in real time, but they can’t retain it—meaning AI models can’t learn from past conversations.

Glean reportedly warned customers that the change “hampers your ability to use your data with your chosen enterprise AI platform.”

Why Is Salesforce Doing This?

Officially, the company says it’s about security and responsible AI. But critics argue it’s a strategic lock-in play:

Control Over AI Data – By limiting API access, Salesforce ensures that only its own AI tools (like Einstein AI) can fully leverage Slack’s data.
Forcing Partners Into Its Ecosystem – The new terms require developers to either:
- Become an official Salesforce/Slack partner, or
- Distribute apps only through Slack’s Marketplace.
Pushing “Agentforce” Integration – Salesforce has been embedding Slack deeper into its CRM, positioning it as an AI-powered “operating system” for businesses.

Industry Backlash: “This Is Anti-Innovation”

The move has sparked frustration across the tech sector, with critics accusing Salesforce of building a walled garden:

“This isn’t about security—it’s about locking customers in,” said one industry insider.
“If data isn’t portable, AI can’t work across platforms,” argued another.
Some see it as hypocritical, given Salesforce’s past advocacy for open ecosystems.

The Bigger Picture: AI’s Data Wars

This isn’t just about Slack—it’s part of a broader battle over AI training data:

Microsoft, Google, and OpenAI have faced lawsuits over using public data for AI models.
Reddit and Stack Overflow now charge for API access to prevent free AI scraping.
Elon Musk’s xAI even sued OpenAI for allegedly hoarding data.

Salesforce’s move suggests that enterprise AI will increasingly run on proprietary data silos—meaning companies that control the data control the AI.

What Happens Next?

Will competitors (like Microsoft Teams) capitalize on this?
Will Salesforce face regulatory scrutiny? (The EU’s Digital Markets Act targets “gatekeeper” platforms.)
Will businesses push back? (Some may switch platforms if data portability is limited.)

One thing’s clear: The age of open data for AI is ending—and the age of data feudalism is here.

Salesforce Tightens Slack’s API Rules

Salesforce Tightens Slack’s API Rules