Everything you always wanted to know about Slack discovery but were afraid to ask.
As Slack data increasingly supplements, and occasionally supplants, email as a primary form of business communication, preserving, collecting, and reviewing Slack data is essential for a complete discovery or investigation process.
Slack can quickly generate vast amounts of data. There are, first and foremost, the millions of messages that can be exchanged in a workspace in one day. Then there is the associated metadata, the timestamps, channel information, edit logs and the like.
But Slack is more than chat. Through apps and integrations, information can be pulled from outside sources in to Slack. Documents, from the most complex database file to a funny photo, can also be directly uploaded and shared through the platform, adding even more information to the stockpile.
By default, that data is stored forever. But, Slack allows workspace owners to customize their message and file retention policies. Files may be kept for the lifetime of the workspace or deleted after a specified time period.
Slack differentiates between message retention and file retention.
Slack message retention can be set to:
For file retention, only two settings are currently available:
Retaining all information is Slack’s default setting. This includes free accounts, where administrators have access to only 10,000 of the most recent messages—but, under this retention setting, Slack itself preserves them all.
If an administrator does not take action to change their retention policy, they could soon find themselves sitting upon a vast history of Slack conversations, reactions, integrations, and more—a potentially valuable resource, or a possibly costly liability, depending on your perspective.
Alternatively, if an administrator sets too liberal a retention schedule, or doesn't adjust the retention schedule in light of a legal hold or reasonably foreseeable litigation, spoliation could follow. Further, where individual team members control the retention of data in private channels and direct messages, one user’s messages could be eradicated at the end of every day, while another’s are preserved for all time.
For all but free accounts, retention settings can be chosen for the workspace as a whole as well as for private channels and direct messages, allowing retention policies to be tailored to specific channels as one might to traditional email inboxes and custodians. But, again, those retention policies must be actively monitored to ensure that Slack data is not edited, destroyed, or otherwise spoliated.
The ability to customize retention policies, as with most workspace administration features, depends on the type of Slack account used. Slack currently has four account types available:
These plans differ primarily in cost, storage size, and admin features. Plus and Enterprise plans, for example, can limit who can post in specific channels—other accounts cannot. Paid plans can set retention policies around private channels and direct messages; free plans cannot. Enterprise accounts, which span multiple workspaces, can apply retention settings across all of their Slack workspaces, a feature not available to any other account type.
Even when Slack data sizes are small, they can be hard to get one’s hands around. One reason for this is that conversations may take place in a muddle of formats—across public channels, private DMs, and comments on documents.
Another is that most Slack data is easily editable. An offensive photo can be deleted, a mistaken disclosure erased. A message that says one thing today can be edited to say another tomorrow.
Yet Slack creates a record of such alterations, often without users realizing it. If a Slack workspace retains editing and deletion information, those changes will be recorded in the metadata—and available in a review tool that knows how to process Slack data.
There's no question that Slack is discoverable ESI—but it's not the same ESI most legal professionals are used to. Handling Slack data poses unique questions around interpretation, spoliation, and burden and proportionality objections.
There is no question that data created in Slack is electronically stored information that can be subject to discovery in litigation. There is also no question that Slack data can be essential to investigations, whether as part of litigation or not. Slack data is a potential treasure trove for legal professionals.
That’s where the certainty ends.
Today it is black letter law that computerized data is discoverable if relevant.” Anti-Monopoly, Inc. v. Hasbro, Inc., 94 Civ. 2120, 1995 WL 649934 (S.D.N.Y. 1995).
For modern legal teams, Slack presents a host of difficult, unanswered questions. How are legal professionals supposed to make sense of Slack’s more informal communication styles, such as the inclusion of emojis and gifs, or the ability to pin, react to, and star, messages? Who is a custodian on Slack? Who is responsible for data preservation when users can set their own retention policies? What is proportional discovery of Slack data and how does it align with users’ privacy interests?
Slack works more like an oral conversation than a document. Participants "speak" (or type) back and forth. Topics can float in an out. A conversation that began in one channel can be taken aside, for a more one-on-one discussion, or pop up again days later in an entirely other space. And all of it's recorded in multiple streams of information, rather than single, organized documents.
Yet most discovery and litigation processes are based on documents: emails, word processing files, spreadsheets. That means that old approaches need to be updated for more chat-based communications.
When dealing with Slack and similar data in discovery, begin by considering such questions as:
These, of course, are all answerable questions. And, indeed, sophisticated parties will often come to a consensus on how to treat Slack data during the meet and confer process. But there is currently no industry standard on how to answer them.
Similarly, when determining a pre-litigation, information-governance approach to Slack data, or advising clients on theirs, consider questions such as:
Parties may obtain discovery regarding any non-privileged matter that is relevant to any party's claim or defense and proportional to the needs of the case...” - Federal Rule of Civil Procedure 26(b)(1)
Given Slack’s novelty, and some of the difficulties associated with Slack data, it’s not uncommon to encounter objections that the reviewing and producing Slack data is disproportionate and burdensome. And it can be. Without the right tools, Slack data can present significant challenges around review and production. Exported directly from the Slack platform, for example, Slack data appears as virtually unreadable JSON code. But with discovery software that can parse and process that data, those burdens can be significantly reduced.
Often, simple facts are the most effective response to claims that the discovery of Slack data would be disproportional or burdensome. Consider the effort involved in obtaining Slack data for discovery. For all plans, the process of exporting public Slack data can be completed in minutes. For messages in private channels, direct messages, and editing logs, that data can be obtained directly under top-tier plans or after showing that the data is subject to discovery or other legal process.
Once obtained, the burden of reviewing Slack data for discovery will depend significantly on the review process and software used. In its native form, Slack data is a virtually incomprehensible mass of JSON code. Because Slack data is so rich with information, a single line of text can result in pages of JSON code.
And because Slack data is novel, many legacy eDiscovery platforms may not be able to handle it, and many vendors may charge a premium. But, with the right software, that data can be rendered and reviewed as easily as any other document type—and often at costs far below traditional approaches to discovery.
When it comes to business communication, Slack is unique. Let’s start with the way communication occurs in Slack, not just its channels, integrations, and messages, but its tone and idiosyncrasies. In few corporate meetings would you respond to a colleague with a simple thumbs down emoji.
You probably would not communicate with a coworker through a .GIF of Betty White doing a shoulder shimmy.
In Slack, such informality is much more common. Because Slack so closely resembles the informal chat rooms of the early internet, because it allows people to communicate rapidly, as they might in face-to-face conversations, because it creates a veneer of privacy and impermanence through its secret channels and editable messages, and because it allows for media-saturated discussions, conversations in Slack often disregard typical office decorum.
This, in turn, raises interpretive difficulties. How is a legal professional, a judge, or a jury, supposed to make sense of a heart emoji in reaction to a Slack message, a ̄\_(ツ)_/ ̄ in response to an inquiry, or that .GIF of Betty White?
To complicate things even more, Slack allows users to create their own emojis by uploading a small image. In addition to the Unicode-regulated world of peach emojis, dancing ladies, and clap-backs, users can add a whole universe of emojis, from Star Wars images to their coworkers’ faces, meant to convey... what exactly? That’s the problem, isn’t it?
Of course, these aren’t issues unique to Slack. Legal professionals working on the forefront of internet communications have been struggling with these same interpretive issues for a while now. As Santa Clara University School of Law Professor Eric Goldman has noted, the profession is currently struggling with at least nine specific “emoji-related interpretive challenges,” from how to report them in court opinions, to how to convey them to a jury, to how to search from them during discovery. But Slack brings these issues increasingly to the forefront by bringing them from the margins and into the center of corporate communication.
Interpretive issues are not the only challenges Slack creates. Take, for example, the traditional idea of the custodian. The Electronic Discovery Reference Model’s glossary defines “data custodian” as a person “having administrative control of a document or electronic file”. It identifies the owner of an email account as the prototypical example.
With Slack data, determining custodians is a bit more complicated. Individuals with administrative access to a workspace have the ability to export public information. But they may not have easy access to private channels, direct messages, and changelogs. Individual users, who can see their own private communications, cannot export that data without administrative access. And while Slack makes it difficult for one custodian to truly control data, it creates the sense of control through private channels and editable, deletable messages.
The control Slack allows over an individual’s messages also creates significant risks of spoliation. Under Federal Rule of Civil Procedure 37(e), as with most state analogues, the loss or destruction of electronically stored information that should have been preserved in the anticipation or conduction of litigation can result in significant sanctions. Where there is a showing that the spoliating party acted with the intent to deprive another of evidence, those sanctions can be case-dispositive.
e) Failure to Preserve Electronically Stored Information. If electronically stored information that should have been preserved in the anticipation or conduct of litigation is lost because a party failed to take reasonable steps to preserve it, and it cannot be restored or replaced through additional discovery, the court:
Slack data can be incredibly valuable, whether in litigation, compliance, or internal investigations. But without the proper tools, Slack data is virtually indecipherable.
"Your engineers will know what to do with these," Slack explains.
But how many clients, and how many law firms, have engineers at all, let alone the engineering bandwidth to create a platform that can process and interpret Slack data? And when it comes to Slack review, very few legal tools are designed to handle Slack data.
As Slack data becomes increasingly rich and complex—full of information message type, edit logs, reactions and more—it becomes even more difficult to handle.
Take comments on a shared file, for example. In Slack, this would appear as a simple message under the file, just a few lines long. When exported from Slack, here's what that those comments look like when exported in JSON format:
You certainly can't review these files on their own. And you can’t toss this into just any discovery software and expect it to be reviewable.
To make sense of data exported from Slack, you need a platform that is designed to process Slack's JSON data and render it in a form at that is easy to review. That doesn't mean just extracting text messages and leaving the rest behind. There is valuable information in Slack's deluge of JSON code, after all!
Your platform should also make that information available—particularly information such as user names, time and date stamps, file types, comments, and edit or deletion records—and include Slack-specific filters so that you can sort conversations by the most relevant criteria for you like participants, channels, and even reactions.
Discovery software like Logikcull can do just that, in a platform that is powerfully simple. In Logikcull, handling Slack data is as easy as sync or upload, search, download.
With Logikcull, you can either pull the data directly from Slack through its direct Slack integration, or upload data previously exported from Slack.
As soon as your chat data is ingested into the platform, it goes through 3,000 automated processing steps: text is rendered and indexed for the most accurate eDiscovery search available, metadata is extracted and preserved to protect against spoliation, quality control tags are applied, and much more.
Slack metadata is instantly turned into filters like conversation participants, channel, sender, deleted and edited messages, and even reactions. You can leverage these filters to cull through chat data and quickly surface the important information.
Slack conversations are also rendered instantly searchable, whether you’re looking for simple text search for keywords or constructing an advanced Power Search based on metadata fields. When it comes time to review Slack documents, Logikcull creates a representation of Slack data similar to how it is displayed in the Slack user interface.
See it in action below:
Once exported from Slack and processed for review in a platform like Logikcull, many of the same discovery best practices that apply to any document review can be employed on Slack data, and you can also leverage features tailor made to handle chat data.
You will also want to be able to quickly identify Slack documents from the rest of your document corpus. In Logikcull, when Slack chats are uploaded, each Slack document is marked with a Slack QC tag. Additionally, you’ll see several chat-specific filters, such as “participants,” “channel,” or “reactions,” which were created with Slack data in mind. These allow you to surface important conversations quickly.
As Slack creates a near-constant stream of communication, it's likely that the vast majority of it will be unnecessary junk. Using powerful culling and search technology, reviewers can easily cull through the vast amounts of data produced by Slack to quickly find and tag the most important information—and cut out the rest.
When review is completed, those Slack documents can be downloaded and produced to others through a secure, permission-based link, allowing you to make sure that your data stays protected throughout your discovery process.
Remember that Slack records more data than the user interface displays. Thus, when a message is deleted in Slack, it will simply disappear—at least, that's what it appears like to users. Similarly, when a message is edited, only the final, altered text is displayed, alongside the parenthetical "(edited)." But, with the proper Slack retention settings, that information can be logged, retained, and surfaced on review.
If a message is deleted, Logikcull displays the deleted information and the time of its attempted destruction. If it is edited, Logikcull shows the original message, the altered version, and the time of the change. That way, review teams can bring clarity to otherwise opaque information—information that could be key to the discovery and investigation processes.
Though Slack presents significant challenges when it comes to litigation and investigations, with the right tools, legal professionals truly can treat Slack as a “searchable log of all conversation and knowledge.”
The first step is to integrate Slack into your regular discovery and investigations process. That means discussing Slack retention and information governance policies with clients. It means adding Slack data to your preservation letters, requests for production, and custodian interviews.
It means looking for indications that Slack might be at issue in a matter, such as the email notifications many users get when receiving a mention or direct message. (Search for the keyword “Slack” or the email address “firstname.lastname@example.org.”)
Most importantly, it means finding a platform that can help you make sense of Slack, one that supports robust a direct integration with Slack for immediate collection, plus dedicated features for chat data culling, document review, tagging, and collaboration, without requiring the intervention of a highly technical IT team—and doesn't charge extraordinary prices for it.
After all, if your Slack discovery solution doesn’t provide comprehensive collection, review, tagging, and collaboration features, then it’s not giving you the tools you need to handle Slack data.
If your Slack discovery process requires you to bring on computer technicians or to pay for a six-figure software setup, then it’s only adding to the problems Slack data creates; it’s not solving them.