Slack

slack.com · San Francisco, United States of America

Slack Technologies, part of Salesforce, provides a cloud-based team collaboration and messaging platform that enables organizations to communicate via channels, direct messages, voice and video, and integrate with a wide range of business applications. The company serves businesses of all sizes globally on a subscription (SaaS) model, with revenue primarily from paid workspace and enterprise plans. Its product is used to streamline internal communication, workflows, and integrations across tools and teams.

  • Communications & Meetings
  • Knowledge Management & Collaboration
  • Workflow Automation
Revenue
$900.0M
Employees
2,500
Founded
2009
Headquarters
San Francisco, United States of America

What 695 Arbolus experts think of Slack

NPS is predominantly high, with more than 70% of experts reporting scores of 8 or above. Renewal intent is strong, especially among high-spend product and IT leaders reliant on advanced integrations, stickiness, and cross-company channels. A minority express concern over costs and feature parity with bundled alternatives. The qualitative feedback highlights exceptional user interface, integration ecosystem, and the centrality of Slack to daily collaboration, but points out cost escalation and occasional notification fatigue as areas of friction.Overall Customer Sentiment: Positive

Who reviewed Slack

Total customers 695 623 current · 72 former
Reviews growth +353 in six months
Seniority of respondents
  • C-Suite 64% (445)
  • Director 20% (139)
  • Manager 16% (111)
Not specified C-Suite NPS 9 Will renew
Operations Leader Manager NPS 9 Will renew
Finance Executive C-Suite NPS 7 Not renewing

Employer names and spend open in the full report, along with the other 692 customers.

Everything 695 customers told us about Slack.

Employer names, spend, renewal intent and every written answer behind the numbers on this page.

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Sentiment

55 Net Promoter Score, from 688 scored reviews
  • Promoters 432
  • Passives 204
  • Detractors 52

Cumulative NPS by month

+0 over 6 months
  • May 9
  • Jun 9
  • Jul 9
  • Aug 9
  • Sep 9
  • Oct 9

Net Promoter Score across 13 reviews, accumulated up to each month. Category median 30 across 13 companies.

Praised

  • Deeper, Seamless Integrations
  • Simpler, More Predictable Pricing Models
  • AI-Powered Summarization and Action Insights
  • Critical for Rapid, Distributed Collaboration

Criticised

  • Microsoft Teams Bundling Pressure
  • Notification Overload Reducing Productivity
  • Search and AI Features from Competitors
  • Notification Overload and Channel Sprawl

What customers say

Critical for Rapid, Distributed Collaboration
“Slack is the backbone of our remote and cross-functional operations—dedicated channels and integrations have reduced our email by 70% while letting us resolve issues in real time.”
Best-in-Class Integrations and Channel Management
“I find Slack’s ability to integrate with tools like Asana, Google Drive, and Salesforce seamlessly allows our team to collaborate efficiently and keep projects moving without context switching.”
External Collaboration via Slack Connect
“The differentiator for us is Slack Connect, which makes working directly with clients and partners streamlined—it's far more effective than email or guest accounts.”

Renewal intent

Plan to renew 73%
  • Will renew 272
  • Undecided 73
  • Not renewing 28

Plan to renew, by seniority

  • C-Suite 75% 245 answers
  • Director 73% 66 answers
  • Manager 60% 40 answers
  • Not specified 73% 22 answers
  • 8.8/10 Average score from customers who will renew
  • 8/10 Average score from undecided customers
  • 7.1/10 Average score from customers not renewing

Top alternatives

Most weighed by Slack customers

Report

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