US filing: Google sent subpoenas in October 2024 to OpenAI, Perplexity AI, and Microsoft for the remedies part of the US v. Google search antitrust trial
Context & Ripple Effects
The subpoenas follow the DOJ's proposal of behavioral and structural remedies in the search case, putting AI-search companies and Google's major platform partner inside the evidentiary record for the remedy debate.
Microsoft's earlier investment in OpenAI was described as a response to concern about Google's position, making Microsoft's OpenAI strategy relevant to how the court evaluates possible competitive alternatives.
First-order effects
- OpenAI, Perplexity AI, and Microsoft must preserve and produce material responsive to Google's subpoenas for the remedies phase, while Google gains discovery from companies central to AI-assisted search and distribution.
- The remedies record expands beyond Google's conventional search conduct to include evidence about emerging AI-based ways users may seek information.
Second-order effects
- The parties can use evidence from AI rivals and Microsoft to argue over whether new interfaces constrain Google or instead depend on incumbent-controlled distribution and infrastructure.
- AI-search companies face added legal and operational burden just as their products become relevant inputs to a competition case, potentially increasing scrutiny of their commercial ties with large platforms.
Third-order effects
- If courts increasingly assess AI assistants as part of search competition, antitrust remedies may be designed around access, defaults, distribution, and data flows across both search and AI interfaces rather than search pages alone.
- The case could become an early test of whether fast-growing AI alternatives materially change market-power analysis; the subpoenas themselves do not establish that they do.
The trend: Search antitrust remedies are widening from legacy search distribution toward the role AI assistants may play as alternative discovery channels.