Parallel is a Premiere Pro extension from 884tak that synchronizes clips by timecode. It is compatible with Premiere Pro 2026, 2025, 2024, 2023 and 2022, covering several recent versions of the editor.
The current version is 1.1.1, published on August 1, 2024, following 1.1.0 on July 25, 2024. Both are listed as first releases on aescripts, giving the extension a short two-release history so far. A demo video is available if you want a look before installing.
On aescripts, where it holds popularity rank 50, Parallel is listed here as free. There is no cost noted to add it to your Premiere Pro setup, though checking the developer's page is the safest way to confirm the latest version and current licensing terms before you install.