Slack

⚠️ Article status notice: This article has been marked as incomplete

This article needs additional work for its sourcing and verifiability to meet the wiki's Content Guidelines and be in line with our Mission Statement for comprehensive coverage of consumer protection issues.

This notice will be removed once sufficient documentation has been added to establish the systemic nature of these issues. Once you believe the article is ready to have its notice removed, please visit the Moderator's noticeboard, or the discord and post to the #appeals channel.

Learn more ▼

This Article Requires Additional Verification

---

This article has been flagged due to verification concerns. While the topic might have merit, the claims presented lack citations that live up to our standards, or rely on sources that are questionable or unverifiable by our standards. Articles must meet the Moderator Guidelines and Mission statement; factual accuracy and systemic relevance are required for inclusion here!

Why This Article Is In Question

---

Articles in this wiki are required to:

• Provide verifiable & credible evidence to substantiate claims.
• Avoid relying on anecdotal, unsourced, or suspicious citations that lack legitimacy.
• Make sure that all claims are backed by reliable documentation or reporting from reputable sources.

Examples of issues that trigger this notice:

• A topic that heavily relies on forum posts, personal blogs, or other unverifiable sources.
• Unsupported claims with no evidence or citations to back them up.
• Citations to disreputable sources, like non-expert blogs or sites known for spreading misinformation.

How You Can Improve This Article

---

To address verification concerns:

• Replace or supplement weak citations with credible, verifiable sources.
• Make sure that claims are backed by reputable reporting or independent documentation.
• Provide additional evidence to demonstrate systemic relevance and factual accuracy. For example:
  • Avoid: Claims based entirely on personal anecdotes or hearsay without supporting documentation.
  • Include: Corporate policies, internal communications, receipts, repair logs, verifiable video evidence, or credible investigative reports.

If you believe this notice has been placed in error, or once the article has been updated to address these concerns, please visit the Moderator's noticeboard, or the #appeals channel on our Discord server: Join here.

Slack

Basic information
Founded	2009
Legal Structure	Public
Industry	Communications, Collaborative software
Also known as
Official website	https://slack.com/

Slack Technologies, LLC (formerly Tiny Speck), is an American software company founded in 2009. they are known for their popular messaging and collaboration platform Slack, catering to organizations and businesses. Slack Technologies, LLC was acquired by the business-oriented CRM software company Salesforce, Inc in 2021. Slack claims to have more than 200,000 paying customers, is used by more than three-quarters of Fortune 100 companies, and offers a messaging platform tailored to government agencies through an instance called GovSlack.

Consumer-impact summary

Overview of concerns that arise from the conduct towards users of the product (if applicable):

• User Freedom
• User Privacy
• Business Model
• Market Control

---

Add your text below this box. Once this section is complete, delete this box by clicking on it and pressing backspace.

Incidents

This is a list of all consumer-protection incidents this company is involved in. Any incidents not mentioned here can be found in the Slack category.

Unannounced fee increase on nonprofit Hack Club (September 2025)

Hack Club is a 501(c)(3) nonprofit organization for teens interested in acquiring or developing functional coding skills.

On September 18, 2025, the UK-based web developer Mahad Kalam, who serves as the Infra Lead of Hack Club's Newspaper group, made a post on his personal website Skyfall.dev stating that Slack had contacted Hack Club and increased the fee for the organization's Slack workspace from $5,000 per year to $200,000 per year. According to Kalam, Slack threatened to delete Hack Club's message history and deactivate their workspace if Hack Club didn't pay $50,000 within a week and agree to pay $200,000 a year for Slack services moving forward, as well as other fees. Kalam said that Hack Club had been given no prior notice of this fee increase and that the minimal notice had been "catastrophic" for the organization's ongoing projects.

Kalam shared his post to the forum Hacker News, where the information was confirmed by Hack Club co-founder and COO Christina Asquith. Asquith stated that a few months before this incident, Slack had changed the terms of each user's agreement with no notice or updated contract, and that Hack Club had experienced difficulty in reaching Slack support to clarify or fix the resulting billing discrepancy. She confirmed that the $195,000 fee increase came with no more than a week's notice. The Hacker News post gained more than 3,000 points from forum users.

Resolution of Hack Club's fee increase

CEO Denise Dresser replied to the Hacker News forum post with an apology, stating the increase was a billing error. Kalam later updated his personal blog post to state that the issue had been resolved and Hack Club had accepted a more favorable deal offered by Slack as a remedy. He stated that Hack Club would also pursue other avenues of owning its own backup data from projects hosted on Slack as a safeguard.

Products

• Slack

See also

• Discord