When Chat Becomes Evidence: Legal Cases Involving Slack, Teams, Texts, and Messaging Apps
The rapid rise of collaboration tools and smartphone messaging has transformed the way people communicate in business and personal life. Unsurprisingly, courts are now grappling with whether and how to treat chats, texts, and ephemeral messages as discoverable evidence. Below is a collection of well-known cases where such data played a central role, shaping discovery obligations, admissibility, and even case outcomes from various companies and educators in the eDiscovery Community.
When do YOU need to go above and beyond the normal email and corporate documents for discovery?
Corporate Chat (Slack, Teams, Google Chat) – Are you collecting the right data?
Lubrizol Corp. v. IBM Corp. (N.D. Ohio, May 15, 2023)
The court ordered IBM to produce targeted sets of Slack and Microsoft Teams messages, requiring production of all messages in smaller threads and “10 before/10 after” in larger ones. Blog summary: https://www.x1.com/blog/court-decision-in-lubrizol-vs-ibm-provides-important-guidance-on-ms-teams-discovery/
Charter Communications Operating, LLC v. Optymyze, LLC (Del. Ch., Jan. 4, 2021)
Optymyze attempted to produce Microsoft Teams chats as 87,000 one-line “emails.” The court rejected this, ordering native chat productions.
Case recap https://www.innovativedriven.com/blog/new-cases-on-hot-discovery-trends-collaboration-tools-categorical-privilege-logs-and-iot-evidence/
Benebone LLC v. Pet Qwerks, Inc. (C.D. Cal., 2021)
Slack surfaced in this patent case when a motion to compel forced production of relevant Slack communications.
Case note: https://ediscoverytoday.com/2021/03/15/court-gives-plaintiffs-no-slack-in-producing-collaboration-app-data-ediscovery-case-law/
SEC v. Ripple Labs, Inc. (S.D.N.Y., 2021)
In this landmark crypto enforcement case, the court granted the SEC’s motion to compel production of Ripple employees’ Slack messages.
Coverage: https://www.bayarea-criminaldefense.com/blog/2021/10/securities-exchange-commission-v-ripple-labs-inc-the-case-that-may-decide-the-fate-of-cryptocurrency/
Red Wolf Energy Trading, LLC v. Bia Capital Mgmt. (D. Mass., Sept. 8, 2022)
After Red Wolf failed to produce corporate chat data, the court imposed severe sanctions, citing bad faith discovery conduct.
Case analysis: https://www.sidley.com/en/-/media/uploads/ediscovery/2022/red-wolf-energy-trading-llc-v-bia-capital-management-llc–f-supp-3d–2022-wl-4112081-sept-8-2022.pdf
Epic Games v. Google / In re Google Play Antitrust Litigation (N.D. Cal., 2023–24)
Internal Google Chat messages became a flashpoint after revelations that Google employees routinely toggled “history off.” The court sanctioned Google for spoliation.
Analysis: https://www.americanbar.org/groups/antitrust_law/resources/newsletters/epic-games-v-google-lessons/
RIG Consulting, Inc. v. Rogers (W.D. Pa., May 8, 2025)
The court compelled the defendant to produce Microsoft Teams account messages and emails within 28 days, awarding fees against the resisting party.
Case summary: https://ediscoverytoday.com/2025/06/17/teams-account-messages-and-emails-must-be-produced-says-court-ediscovery-case-law/
DOJ/FTC reinforced preservation duties for Slack/Signal/Chats given recent spoliation rulings. (Related agency guidance)
Department of Justice: https://www.justice.gov/archives/opa/pr/justice-department-and-ftc-update-guidance-reinforces-parties-preservation-obligations
Federal Trade Commission: https://www.ftc.gov/enforcement/competition-matters/2024/01/slack-google-chats-other-collaborative-messaging-platforms-have-always-been-will-continue-be-subject
Smartphone Texts, WhatsApp, and Signal – What other data are you missing?
Twitter, Inc. v. Elon Musk (Del. Ch., 2022)
In the litigation over Musk’s attempt to terminate the $44 billion Twitter acquisition, dozens of text/iMessage conversations between Musk, investors, and advisors were unsealed as trial exhibits.
Coverage: https://time.com/6218578/elon-musk-texts-twitter
Waymo LLC v. Uber Technologies, Inc. (N.D. Cal., 2017–18)
Waymo alleged that Uber encouraged executives to use Signal and ephemeral messaging to conceal trade secrets. The court allowed Waymo to present evidence of disappearing messages.
Case coverage: https://en.wikipedia.org/wiki/Microsoft_v._United_States_%282016%29
Vardy v. Rooney (UK High Ct., 2022)
Nicknamed the “Wagatha Christie” case, this UK libel battle turned on WhatsApp messages (and missing messages) between Rebekah Vardy and her agent.
Coverage: https://en.wikipedia.org/wiki/Wagatha_Christie
Practical Takeaways
- Chats are discoverable: Courts increasingly treat Slack, Teams, and Google Chat as core ESI, not optional add-ons.
- Context matters: Producing chats as one-line “emails” or without threading loses meaning and may be rejected.
- Ephemeral risks: Use of disappearing-message apps (Signal, WhatsApp, Google Chat “history off”) is drawing spoliation sanctions.
- Texts are fair game: From high-stakes M&A to defamation, smartphone conversations often provide the “smoking gun.”
As modern communication expands, litigants must anticipate that judges expect proportional but meaningful production of chat and text data. Ignoring or mishandling this evidence can cost cases, sanctions, or billions in settlement leverage.