PhysicsWallah opens the Test Prep arc at 67.3% SoV, winning all three engines outright.

The inaugural Test Prep Edtech reading puts PhysicsWallah at 67.3% combined SoV with 101 mentions across the 50-prompt run, taking the top slot on ChatGPT (56%), Gemini (72%) and AI Mode (74%).

Unacademy follows at 58.7% — the only other brand the engines reach for unprompted in a majority of buyer-language queries.

Adda247 and Vedantu tie for third at 24.7% but split engines: Adda247 leads on ChatGPT, Vedantu on AI Mode (rank 3).

BYJU'S sits fifth overall at 18%, with a sharp engine asymmetry — 30% on ChatGPT versus just 8% on AI Mode — the widest single-brand spread in the vertical.

Two things are visible from day one.

First, this is a duopoly-shaped category at the top: PhysicsWallah and Unacademy together account for the bulk of unaided AI recall, and both are reinforced by deep first-party citation pools pw.live and unacademy.com are the #2 and #3 cited domains.

Second, BYJU'S is now an engine-memory brand, not a buyer-language brand — ChatGPT still surfaces it on legacy training data while AI Mode, which leans more heavily on live retrieval, has largely moved on.

The category lesson: in test prep, owning your own domain's content depth matters as much as third-party press, because the engines pull from coaching sites directly.

Aggregators like testbook.com, academycheck.com and play.google.com are the neutral ground where challenger brands can still be surfaced.