Companies that use Slack (verified customer list)

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Amazon Walmart IBM NVIDIA PayPal Northwestern Mutual Palo Alto Networks Oracle Target Workday

We dug into our own data to find out how Fortune 500 companies are using Slack. Here are some real-world examples of the biggest companies using Slack.

Amazon

Technology / Retail - Seattle, Washington

Amazon is the largest Slack customer we've tracked. They use it as their main internal communication tool across corporate, AWS, and subsidiary teams, and also as a way to roll out internal AI tools to their workforce.

Amazon has over 1.5 million employees worldwide. All corporate staff sign into Slack through Amazon's own login system, so access is managed centrally alongside everything else in the company.

The more interesting part is how Amazon uses Slack to get new tools in front of employees. Aza is Amazon's internal AI assistant, and it hit 65% adoption across their global workforce within 18 months. One of the main ways employees access it is through Slack. Rather than asking people to go find and open a separate tool, Amazon made Aza available right inside Slack where employees already spend their day. It's a practical distribution strategy: the tool comes to the employee, not the other way around.

Walmart

Retail / Technology - Bentonville, Arkansas

Walmart uses Slack for day-to-day communication across engineering, creative, and operations teams, and as the main way their engineers interact with an internal AI assistant called Wibey.

Wibey is an AI tool Walmart built for their engineering teams. It can answer questions, help set up new projects, run diagnostics on systems, and pull up internal documentation, all through a normal conversation interface. Engineers can use it through several surfaces, but Slack is one of the primary ones.

The practical effect is that Slack becomes the front door to a lot of Walmart's internal engineering tools. Instead of opening a separate portal or system to get something done, an engineer can just ask Wibey in Slack. Amazon is doing something similar with Aza, and seeing two of the world's largest retailers land on the same approach independently is worth noting.

IBM

Technology / Consulting - Armonk, New York

IBM uses Slack company-wide for communication, but also wired it deeply into how their engineering and sales teams actually do their work, automating a lot of manual coordination that used to happen through email and meetings.

IBM started their formal Slack rollout in 2017 under a program called Slack@IBM, deploying dedicated staff specifically to manage it. The numbers they've reached are striking: 250,000 employees send an average of 9.2 million messages per day, with 3,500 apps installed and 3,400 automated workflows running every month.

On the engineering side, Slack channels receive automatic alerts at every stage of building and shipping software. When a developer submits code for review, when tests run, when something gets deployed live, the relevant people get notified in Slack rather than having to check a separate system. On the sales side, when a new sales opportunity opens up in Salesforce, IBM automatically creates a dedicated Slack channel for that deal and pulls in the right people from across the business. The whole deal can play out in one place, and IBM can even bring the client into that Slack channel directly.

NVIDIA

Technology / Semiconductors - Santa Clara, California

NVIDIA uses Slack as their main internal communication platform and is actively building AI-powered automation on top of it to reduce repetitive work across the company.

Slack sits at the center of NVIDIA's collaboration stack, alongside project tracking tools like Jira, internal wikis, and Google Workspace. They're not just using it to chat, they're building workflows inside Slack that can summarize conversations, find information from internal knowledge bases, and automate tasks that used to require manual effort.

They also use dedicated Slack channels for specific operational functions. Their cybersecurity team, for example, runs developer office hours and shares security guidance through Slack rather than email, which keeps those conversations where engineers already spend their time.

PayPal

Financial Technology - San Jose, California

PayPal uses Slack for two things that stand out: pushing business performance data directly to teams in real time, and monitoring their customer-facing systems when something goes wrong.

On the analytics side, PayPal's small business analytics team is building a system that sends performance updates directly into Slack rather than requiring people to log into a reporting tool. The idea is that instead of someone having to remember to go check how things are going, Slack proactively alerts the right person when something looks unusual. Business summaries, goal tracking, and executive reporting are all part of what they want to move into Slack.

On the operations side, the team responsible for all the notification emails and texts that PayPal sends to customers globally monitors dedicated Slack channels to catch problems as they happen. When something breaks, Slack is where the team gathers to diagnose it, coordinate a fix, and keep everyone informed. It's the last checkpoint before a broken message reaches a customer.

Northwestern Mutual

Financial Services / Insurance - Milwaukee, Wisconsin

Northwestern Mutual doesn't just use Slack. They have a dedicated engineering team whose entire job is to run Slack as an internal platform, the same way another team might own the company's email system or internal database.

That team handles everything. They build automated workflows that help employees get routine work done faster. They manage the connection between Slack and the company's employee directory, so when someone joins or leaves, their Slack access is automatically updated. They build custom Slack bots, automated assistants that live inside Slack and can answer questions or route requests without a human having to do it manually. They handle security and compliance. And they field requests from employees across the company when something isn't working.

For a 165-year-old insurance company, the level of investment here is notable. Most organizations treat Slack as software they subscribe to. Northwestern Mutual treats it as infrastructure they actively operate and maintain.

Palo Alto Networks

Computer and Network Security - Santa Clara, California

Palo Alto Networks uses Slack as a primary channel for reaching their global sales organization, and as a place where their engineering teams can access internal tools without having to open a separate system.

A weekly company newsletter reaches more than 6,000 employees through Slack. Product launch announcements, partner updates, and changes to sales programs all go out the same way. For a company with a large distributed sales force, Slack is effectively the internal broadcast system that keeps everyone on the same page.

On the engineering side, the team builds custom bots that live inside Slack and let developers get things done without switching to another tool. Need to request access to something, check the status of a system, or kick off a process? It happens in Slack rather than through a separate portal. The goal is to keep engineers in one place rather than constantly jumping between systems.

Oracle

Enterprise Software & Cloud Infrastructure - Austin, Texas

Oracle uses Slack across every function in the business, not just engineering, and their security team has it wired into how they detect and respond to problems in real time.

Oracle has around 200,000 employees across more than 175 countries, spanning dozens of distinct product lines: database software, cloud infrastructure, healthcare systems, construction management, HR platforms, and more. With that many different business units, each with their own compliance requirements and data rules, they run a centralized version of Slack that gives IT and legal central oversight over what's installed and what's retained.

Their security operations team, in particular, uses Slack as a real-time coordination layer. When an automated alert fires because something looks wrong, it shows up in a dedicated Slack channel and the team uses that channel to investigate and respond rather than switching to email or a separate ticketing tool.

Target

Retail - Minneapolis, Minnesota

Target uses Slack across a surprisingly wide range of functions, from campaign support with advertising partners to engineering alerts to marketplace compliance, and has a dedicated internal team building AI directly into it.

Target has a dedicated internal product team with formal ownership of Slack as a platform, sitting alongside ChatGPT Enterprise, Zoom, and Microsoft 365 in their official productivity stack. That team's job includes building AI features into Slack, which means Slack isn't just something Target uses, it's something they actively develop on top of.

The day-to-day use goes wide. Roundel, Target's advertising business, uses dedicated Slack channels to coordinate campaign support with brand partners. Their third-party marketplace compliance team uses a specific channel for product classification and regulatory review workflows. Their engineering monitoring system routes over 300,000 automated alerts per day into Slack, so engineers get notified directly when something looks off rather than having to watch dashboards. And their India engineering team builds and maintains Slack bots as core internal work.

Workday

Enterprise HR & Finance Software - Pleasanton, California

Workday uses Slack as their main internal communication platform, and is also building a product that lets their customers complete HR and finance tasks directly inside Slack without ever opening Workday.

Internally, Slack is how Workday's teams communicate across engineering, sales, security, and the executive team. Their security team uses it for real-time incident response: when an automated alert fires or a system change needs approval, that all plays out in Slack rather than email, connected to their ticketing and project management systems so the full response stays in one place.

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HubSpot Splunk Telnyx Vonage HelloFresh Marvell NBCUniversal

We dug into our own data to find out how mid-size companies are using Slack, focusing on companies that use it as their primary workplace chat as well as for public Slack communities. Here are some real-world examples.

HubSpot

CRM & Marketing Software - Cambridge, Massachusetts

HubSpot uses Slack internally to keep a global team connected across seven offices, and runs a separate public Slack for their developer community.

Internal Slack: Communication and Culture Across Seven Offices

HubSpot has offices in Cambridge, Dublin, Berlin, Tokyo, Sydney, Singapore, and Bogotá. Keeping a team that spread on the same page requires more than just email, and Slack is how they do it. Beyond day-to-day communication, they use it intentionally for culture: employee groups built around shared interests, ways for people in different offices to connect, and access to leadership. One detail worth calling out: employees can message the co-founders directly on Slack. For a public company, that kind of openness is unusual.

Public Developer Community at hubspotdev.slack.com

HubSpot's developer Slack is for the agencies, partners, and independent developers who build things on top of HubSpot, whether that's connecting it to other tools, building apps that run inside HubSpot, or customizing how it works. HubSpot is upfront that it's not a support channel; it's a place for developers to help each other. When HubSpot rolls something out in early access, developers can join a dedicated channel to test it and give direct feedback before it goes live more broadly.

They also run a separate Slack workspace just for startup founders going through HubSpot's accelerator program. Three distinct Slack environments for three distinct audiences, each managed on its own.

Splunk

Data Platform & Security - San Francisco, California (acquired by Cisco, 2024)

Splunk uses Slack internally and runs a public community Slack organized around local user groups, which is a different approach from most developer communities you see built on Slack.

Internal Slack

Splunk runs Slack internally across their teams. Cisco acquired them for $28 billion in 2024, so Splunk's Slack environment now sits inside a much larger organization alongside Cisco's own infrastructure.

Public Community Slack at splunkcommunity.slack.com: Organized by City and Region

Most developer community Slacks are organized around technical topics. Splunk's is organized around geography. Each city or region gets its own channel, and the members are the security engineers and IT administrators who actually run Splunk day to day at their companies, not developers building on the API.

The conversations tend to be practical: how to write a better search, how to manage licenses, how to set up alerts that aren't too noisy. Splunk has dedicated community managers who actively participate rather than just watching from the sidelines, which makes the conversations more useful than a typical user forum.

Telnyx

Cloud Communications Platform - Chicago, Illinois

Telnyx uses Slack internally and runs a public developer community on it that gives customers a direct line to the Telnyx engineering team, which is a meaningful part of how they compete against larger rivals like Twilio.

Internal Slack

Telnyx runs Slack internally across their Chicago headquarters and distributed engineering team.

Public Developer Community at joinslack.telnyx.com

Telnyx launched their developer Slack in 2018 as a way for customers to talk directly with the team building the product. Rather than opening a support ticket and waiting, developers can jump into Slack and ask the engineers themselves. For complex or unusual use cases that aren't covered in the documentation, that direct access makes a real difference.

The community channel is set up so that Telnyx employees can see and respond to conversations without the external community having access to the rest of the internal Slack workspace. It keeps the two environments connected without merging them.

Vonage

Communications Platform - Holmdel, New Jersey (Ericsson subsidiary since 2022)

Vonage uses Slack internally, runs a developer community on it, and sells a product that lets other companies make phone calls and run video meetings directly inside Slack.

Internal Slack

Vonage runs Slack internally across their offices in New Jersey, Atlanta, London, Tel Aviv, and elsewhere. Ericsson acquired them for $6.2 billion in 2022, so they now operate as a subsidiary within a much larger telecommunications company.

Public Developer Community at developer.vonage.com

Vonage's developer Slack is for engineers building on their APIs, which let developers add voice calls, text messages, video, and identity verification to their own applications. The Vonage developer relations team is active in the workspace, and it lives alongside the documentation and code on the Vonage developer site rather than being a separate destination.

The third layer is the most interesting: Vonage sells a product that runs inside other companies' Slack environments. Their Vonage Business Communications app, available in the Slack app directory, lets employees make and receive phone calls, start video meetings, and check their call history directly from Slack. So they use Slack internally, host a developer community on it, and sell a phone system that lives inside Slack for their own customers.

HelloFresh

Consumer Food - Berlin, Germany

HelloFresh uses Slack not just for office communication but as an operational tool wired into their production facilities, supply chain, and security monitoring across 18 countries.

What's notable is how far Slack reaches into the physical side of the business. Their food safety and quality teams use Slack to manage error reporting on the production floor. When something goes wrong during packing or preparation, it gets flagged in Slack and routed to the right people immediately, rather than sitting in someone's email inbox. Their supply chain teams get real-time alerts in Slack when something in the logistics chain goes off plan. The security team monitors dedicated channels for system alerts. Even invoice tracking for their ecommerce operations feeds into Slack.

Most people think of Slack as an office tool. HelloFresh using it as part of how a food production and delivery operation runs day to day is a useful reminder of how broadly it's spread into industries built around physical work.

Marvell Technology

Semiconductor Manufacturing - Santa Clara, California

Marvell has a dedicated engineer whose entire job is running Slack as an internal platform, and uses it as the primary communication channel across virtually every function in the company.

Marvell makes the semiconductor chips that power data movement and storage inside servers, cloud data centers, and carrier networks. Around 11,000 employees globally, and they also run Microsoft Teams alongside Slack.

Their Slack setup goes deeper than most. They've had a dedicated engineer whose sole responsibility is owning and operating Slack for the whole company: building connections between Slack and other internal tools, automating administrative tasks, tracking how the platform is being used, and planning where it goes next. That level of investment in a single communication platform is unusual for a hardware company.

Slack is also where internal communications actually happen at Marvell, not just as a backup to email. Company-wide announcements go through Slack. The HR and employee wellbeing team uses it to communicate benefits and programs. The IT and cybersecurity team manages incidents and communicates system changes through dedicated Slack channels. Even facilities and real estate updates go through Slack rather than email. It runs through the whole company.

NBCUniversal

Media & Entertainment - Englewood Cliffs, New Jersey

NBCUniversal's most notable Slack use case is security: they've built formal controls into Slack to prevent sensitive information from ending up in the wrong hands.

NBCUniversal operates NBC, Peacock, Universal Pictures, Telemundo, Bravo, and a portfolio of theme parks. With tens of thousands of employees across a decentralized organization spanning broadcast, streaming, and film, a lot of sensitive material flows through internal tools every day: unreleased scripts, financial data, personal information, content that hasn't been announced yet.

Slack is where a lot of real conversations happen, which means it's also a place where sensitive information can be accidentally shared in the wrong direction. NBCUniversal's cybersecurity team has built active controls into Slack to prevent that, monitoring for and blocking certain types of sharing the same way they would in email or cloud storage. Slack is treated as a governed business tool subject to the same rules as the rest of their technology stack, not just a chat app that sits outside the security perimeter.

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Brex Gainsight Dagster Docker Pantheon Langfuse SeatGeek DataRobot

We dug into our own data to find out how smaller companies and startups are using Slack. Here are some real-world examples.

Brex

Corporate Cards & Financial Software - San Francisco, California

Brex uses Slack internally, and runs a separate public Slack for developers building on their API.

Brex is a corporate card and expense management platform for startups and enterprises, with staff working hybrid from San Francisco, Salt Lake City, and New York. As a fintech handling sensitive financial data, the compliance controls that come with enterprise Slack, things like how long messages are retained and what tools employees can connect, actually matter here.

Beyond their internal use, Brex also runs a public Slack for developers building on their API, linked from their developer site, for engineers at other companies who want to integrate Brex into their own tools and workflows.

Gainsight

Customer Success Platform - San Francisco, California

Gainsight uses Slack internally, runs a public Slack community for Customer Success professionals, and has built an AI assistant that answers account questions directly inside Slack.

Gainsight makes the software that Customer Success teams use to track account health, manage renewals, and reduce churn. Their team of 1,300+ operates on Slack across the US, India, and Europe, alongside Microsoft Teams.

Their public Slack, at customersuccesschat.slack.com, is different from every other community in this list. It's not for developers; it's a professional community for Customer Success Managers. Monthly Q&As with CS leaders, peer discussions around renewals, account health, and career development. Gainsight sells to CS teams, so building a space where those people genuinely spend time is a long-term play: someone who gets real value from the community and later moves into a buying role is already familiar with the brand.

On the product side, Gainsight built an AI assistant that lives inside Slack. Account managers can ask it questions in plain language, things like which accounts are coming up for renewal or what the health score is for a particular customer, and get answers without opening Gainsight. For a product built around keeping CS teams on top of their accounts, surfacing that information where those teams already spend their day makes sense.

Dagster

Data Orchestration Platform - San Francisco, California

Dagster is a tool that helps data teams manage and schedule the pipelines that move and transform data around their organization. It's open source, which means anyone can download and use it for free, and the public Slack at dagster.slack.com is where those users ask questions, report problems, and request features.

Keeping those open source users engaged is also a commercial strategy. The developers who rely on the free version are the most likely candidates to eventually pay for Dagster+, their managed commercial offering. Getting their questions answered quickly in Slack is both community management and sales pipeline at the same time.

Docker

Container Platform - San Francisco, California

Docker is fully remote with no offices, uses Slack as their entire internal communication layer, runs one of the larger developer community Slacks around, and uses Slack Connect to give enterprise customers a direct line to their support team.

Docker has no physical offices. Employees are spread across San Francisco, Cambridge, Paris, and beyond, and their careers page says plainly that Slack and Zoom are how people work. There are no hallways or meeting rooms; Slack is essentially the whole office. That makes the controls that come with the enterprise version of Slack more important than they would be at a company where people can also just walk over and talk, things like centralized management of which apps are installed, data retention policies, and compliance tooling.

Beyond their internal setup, Docker launched a public community Slack at dockercommunity.slack.com back in 2016, and it's grown into one of the larger developer community workspaces around. It covers general Docker questions, support threads, and coordination for local user groups, with Docker Captains, their recognized community contributors, active throughout.

Pantheon

WebOps Platform - San Francisco, California

Pantheon uses Slack internally as the coordination layer for a globally distributed IT team, and runs a public community Slack for the WordPress and Drupal developer ecosystem that has been active for over a decade.

Pantheon powers 700,000 websites for customers including Uber, Okta, and Home Depot. Their IT support staff is spread across San Francisco, Vancouver, Manila, London, and Bangalore, and Slack is how that team stays coordinated across those time zones: support requests, troubleshooting, and employee help all flow through it rather than through email chains.

Their public community Slack has been running for over ten years, one of the longest-running in this list, with more than 6,000 developers passing through it. The audience is freelancers, agency engineers, and in-house web teams in the WordPress and Drupal ecosystems. Pantheon's developer relations team runs weekly office hours inside it and uses it to coordinate around WordCamps and DrupalCons, the major conferences for those two communities.

Langfuse

Open Source LLM Engineering Platform - Berlin, Germany

Langfuse uses Slack Connect as one of their primary support channels, giving enterprise customers a direct line to the engineers who can actually fix their problems.

Langfuse is a small team with a large user base. They build open source tools that help engineering teams monitor and improve AI applications, tracking how an AI model is behaving in production and identifying where it's going wrong. With that many users and a small team, they have to be deliberate about how they handle support.

For their most important customers, that happens through Slack Connect, which lets two separate companies share a channel and talk directly without either side having to leave their own Slack workspace. Rather than submitting a ticket and waiting, customers can ask questions in real time. For complex technical problems, the team will jump on a Slack Huddle to work through it together. The engineer handling the conversation is often the same one who can ship a fix the same day.

SeatGeek

Ticketing Marketplace - New York, New York

SeatGeek treats Slack as a managed platform, using it not just for communication but as a connected layer that ties their internal tools together and lets employees take actions without switching between systems.

SeatGeek connects their internal tools to Slack using an automation platform called Workato, which acts as the glue between Slack and the other software they run. Information from other systems gets pushed into Slack automatically, and employees can take certain actions from inside Slack rather than having to open a separate tool. Custom bots handle specific workflows, routing information and triggering actions across teams. The whole setup is actively managed rather than left to grow organically.

DataRobot

AI Platform - Boston, Massachusetts

DataRobot's engineering team built an internal system on top of Slack that automatically notifies engineers when their code needs attention, so nothing gets lost and no one has to manually babysit their work.

When a software engineer writes code and submits it for review, there's a lot of waiting involved: waiting for automated tests to run, waiting for a colleague to review it, waiting to find out if something failed. Normally an engineer has to actively check on all of that by opening separate tools. DataRobot built a system called EngProd that handles those notifications through Slack instead. When code is ready for review, when tests fail, or when something in the build process needs attention, the right engineer gets a Slack message. The information comes to them rather than them having to go looking for it.