How to get the most out of Slack

Though it's only four years old, Slack has evolved to become a leading cloud-based workplace collaboration app. Here's what it does, how to use it and why it could replace email in the future.

Magdalena Petrova

Since its launch in 2014, Slack has become a popular tool for enterprise collaboration; it now has 6 million daily active users worldwide – around a third of whom are paying customers – and it continues to evolve to take on even more tasks.

With a valuation of $5.1 billion, Slack Technologies – the company behind the app – generated $250 million with its latest funding round and appears headed towards an IPO. Recently, it added former Goldman Sachs head of human capital management Edith Cooper to its board and appointed its first CFO, Allen Shim, who has been with the company for four years.

Those personnel moves and the funding interest are clear signs that the company is maturing. Having gained a foothold in many organizations thanks to viral adoption by small teams of users – many of whom happily extol its virtues, thus prompting new users to sign up –  the next step for Slack is to target company-wide deployments at larger enterprises.

That would put it in even more direct competition with the likes of Microsoft Teams, Workplace by Facebook, Atlassian’s Stride, and a host of other lesser-known upstarts. 

“Slack is growing up,” said IDC research director Wayne Kurtzman. “What started as a free collaboration platform that people brought in from home now has over 2 million paid users and is rapidly becoming a mature enterprise solution that integrates with a large number of major IT investments.” 

What is Slack?

Put simply, Slack is a cloud-based application that connects teams of workers, allowing them to collaborate in real-time on projects and share documents, images, videos and other data necessary to do their job. It is available as a standalone app for desktops or mobile devices (Android, iOS and even Windows Phone), as well as via web browser.

“The idea is to bring teams together to help them work together more efficiently and effectively,” said Richard Edwards, service director and distinguished research analyst at Freeform Dynamics.

Of course, it is not just about work. Slack wants to make interactions more fun, which has been a big part of the secret behind its success: public channels can often be awash with GIFs and banter between colleagues, acting as something of a digital watercooler for workers who can be as close as the next desk over, or as far away as a different continent.

Slack started life as a messaging tool for developers working on a video game. After the game development was shut down, attention turned to building out the instant messaging app that was to become Slack; that effort was headed up by founder and CEO Stewart Butterfield, who also co-founded the photo sharing site Flickr. The first version of Slack in its modern incarnation appeared as a beta in August 2013.

The basics of Slack are simple for new users to grasp, which helped its viral spread. 

Teams of users are organized into workspaces where they can communicate and share documents. Smaller businesses are likely to have only one workspace, while larger enterprises may have multiple interconnected groups.

Slack shared channels Slack

Slack shared channels

Three types of channels exist within each workplace for team members: public, private and, more recently, shared channels. The latter enables  communications with staffers at external companies. Channels allow discussions to center on a specific project, team (such as sales or marketing) or a shared interest topic (video, for example).

Slack has high hopes for channels: "We believe Channels will replace email as the primary way that people communicate and collaborate at work,” a spokesperson said.

The app also offers direct messages for quick conversations with another team member. Ad-hoc groups of up to eight members can be set up, with colleagues easily found by searching in a Team Directory, which provides an overview of people in a company.

Since launch, the platform has quickly added new features. Video and voice-calling capabilities were rolled out in 2016 and last year screen sharing was enabled – the result of Slack’s ScreenHero acquisition. Other recent feature additions include the long-awaited introduction of threaded messages.

How to set up Slack channels and workspaces

Each workspace starts off with two channels, #general and #random, but most users will want to add more almost immediately. 

Once up and running with the software, it is easy to set up a new channel. Using the desktop app, first click the “+” icon next to the Channels heading in the left-hand side bar. From there you can select whether the channel will be public or private, give it a name and add in any other relevant information (such as the topic of discussion). 

Next, you select members to invite by clicking the invite box (to browse a list of colleagues) or type a name into the search bar. 

The channel creation process is largely the same on mobile devices, too. 

All members aside from guests are allowed to create a new channel, though workspace admins can limit the creation of public or private channels. (Only admins are allowed to create shared channels with external groups.)

For those who want to create an entirely new workspace, first head to the workspace creation page, From here, you’ll provide an email address and receive a code to enter for confirmation, before adding display name, password and workspace name. The next step is to review workspace settings and permissions before you start inviting people into the new workspace.

How to link Slack to other productivity apps

One of the main attractions of Slack is the huge range of app and chatbot integrations available for it. This means that users can interact with third-party apps such as Skype, Box or Google Drive from within Slack, helping position it as a central hub of productivity (or, in the case of the Giphy integration, a place to share gifs). Another popular integration is Atlassian’s Trello, a new breed of collaborative task management, which has some overlap with Slack but focuses on kanban-style boards to coordinate projects.

Slack app directory Slack

Slack's app directory.

Slack has also struck partnerships with enterprise software stalwarts such as Oracle, SAP, Workday and ServiceNow – the last of which was one of the most requested by users. The ServiceNow integration allows incidents from the IT service management tool to flow directly into Slack channels. 

“One of its biggest strengths is how Slack integrates external applications into a chat stream,” said Larry Cannell, research director at Gartner. “This type of integration enriches the conversation and gives the chat stream a purpose and a reason for a user to stay within the chat.”

There is also a vibrant ecosystem of companies developing atop Slack’s platform, with thousands of apps now available in its App Directory. One example is the popular Slack-based to-do list and task management toolkit, Workast, which this week received $1.85 million in venture capital funding.

Slack apps - Google Drive Slack

Slack and Google Drive.

Meanwhile, the Slack Fund, launched in 2015, provides funding to companies building bots on top of its platform. 

“Slack has grown to be much more than group messaging, as its 155,000+ member developer community can attest,” said Kurtzman.

With that in mind, it will hold its first developer conference, Spec, on May 22; the event will offer  keynotes and technical sessions that lay out Slack’s vision for its platform.

Automation tools, such as IFTTT (If This,Then That) also offer interesting ways to incorporate different applications into Slack. This could mean using smartphone location to notify a team channel when you arrive at the office, or remind team members to submit expense forms before the end of the month.

Slack pricing

A freemium model has been at the heart of Slack’s business since launch, and was a key component to its viral adoption by business users. In many cases, users sign up with Slack for free; from there, the tool tends to proliferate more widely throughout an organization, which then pushes IT to roll it out more formally.

Slack for Teams features three tiers. The free service is limited to 10 app integrations, with search is capped at 10,000 messages and storage at 5GB.

The Standard plan, which costs $6.67 per active user per month, offers  features such as group video calls for up to 15 users with screen sharing, guest accounts and shared channels. It removes search limits, doubles the amount of storage and adds priority support and enhanced security features such as two-factor authentication. 

The Plus tier costs $12.50 per active user per month, and adds other features designed to appeal to large businesses and IT managers. These  include user provisioning and de-provisioning, SAML-based single sign-on and compliance tools. There is also 24/7 support and a guaranteed uptime SLA.

Slack Enterprise Grid

While various corporate customers use the Plus tier to support thousands of staffers, in 2017 Slack launched a product aimed squarely at larger deployments: Slack Enterprise Grid.

It has had early success in this area: Slack recently reported that 150 or so large organizations are using Enterprise Grid, including Capital One, Target and 21st Century Fox. Its largest deployment, involving more than 110,000 users, is with IBM. 

The enterprise edition includes advanced security controls and user and administrative functions for an unlimited number of workspaces. It is designed to support deployments at companies with tens of thousands of employees with separate, but connected, workspaces.

“With Enterprise Grid we have a realization that a CIO cannot hit a button and install Slack across the entire organization,” said Ilan Frank, head of Slack’s Enterprise Product team.

There are improved security, compliance and billing features, as well as support for e-Discovery, data loss prevention and offline backup providers. Enterprise Grid customers also gain access to Slack’s customer success and professional training teams, as well as a guaranteed four-hour response time for support. 

Unlike Slack’s other products, pricing for Enterprise Gird is not disclosed; it's available on request, depending on a company's specific needs.

Slack's competition: Microsoft, Google and Facebook

Slack’s stellar growth has highlighted wider demand for new modes of interaction between staffers that move beyond some of the shortcomings of email and enterprise social networks. The result is a booming market for team collaboration applications. According to Gartner’s Workstream Collaboration report, the market will grow at a compound annual growth rate of 96% between 2016 and 2021, vaulting from $171 million to $4.9 billion over that five-year period.

This is good news for Slack, which currently accounts for the majority of spending on work stream collaboration tools with $200 annual recurring revenues. But it has also prompted stiff competition spring up on a number of fronts, with some of the biggest vendors in the software market keen to get in on the action. 

Slack CTO Cal Henderson said that the main advantages Slack has over rivals is its large active user base and years of experience honing its software.

“We have millions of people using it every day to get their work and we really have a big, built-up bunch of knowledge about what is effective in team communication tools,” he said. “We are building something that once people start using, they keep using and find super useful to collaborate.”

group chat services - Microsoft Teams Microsoft

“Microsoft Teams and Google Hangouts would be the primary competitors,” said Margo Visitacion, vice president and principal analyst at Forrester.

Microsoft reportedly considered acquiring Slack two years ago before deciding to build out its existing collaboration and communication capabilities. The result was the launch in early 2017 of Teams, which is set to replace Skype for Business over time. Slack’s response to the entrance of Microsoft to a market it essentially created was to take out a full page ad in the New York Times, welcoming Slack with some “friendly advice.”

While Cannell said Microsoft Teams is the biggest competitor to Slack, there are notable differences between the two platforms, with Slack more keenly focused on conversations and workflows. 

“Microsoft’s approach with Teams is different from Slack in that it front-ends other Office 365 features, such as the content collaboration capabilities in SharePoint and OneDrive for Business,” he said.  

“This makes Teams a robust content collaboration solution, not just a workstream collaboration product.”

Google, meanwhile, has relaunched its Hangouts tool, separating it into two apps: Meet and Chat, the latter of which is currently available as an early adopter preview. The forthcoming full launch of Hangouts Chat will present a further challenge to Slack as it will also be available as just one component of a G Suite subscription that includes email, content collaboration capabilities with Google Docs, and more.

Google and Microsoft are far from the only competitors to Slack. In fact, there are a wide range of vendors offering tools that have varying degrees of similarity.

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