A VPAID alternative lines up a media file, SIMID, and OMID

VPAID alternative is the search for one successor to an executable that used to do three jobs. IAB does not offer one successor. The SIMID page says VPAID is being replaced by OMID for measurement and verification and by SIMID for interactivity, with the interactive layer separated from the media asset and both delivered by VAST 4.x. The player keeps the file. That file is the part VPAID was allowed to swallow, and it is the part a television can still play.

vastlint is not that alternative. It does not render a creative, execute JavaScript, or stand in for a player. It checks VAST 2.0–4.4 structure: a media file a player can select, SIMID only on an interactive file that has something beside it, and a verification node when the tag claims measurement. A green result means the document matches that split. It does not mean a particular TV ran the ad.

What fails if you replace the name and keep the shape

A SIMID document as the only creative is the VPAID shape with a new apiFramework. Players that skip the sidecar, which is a normal SSAI outcome, then have nothing to splice. Google's IMA HTML5 page still documents VPAID 2 as an HTML5-only compatibility mode, which is a narrowing, not a recommendation to keep it as the universal spare. Shipping VPAID for the web row and SIMID for everyone else, inside one vast tag aimed at both, is two products. It is not a migration.

Measurement has the same trap. A script that fires a quartile from inside the creative is the creative claiming it played. OMID is a verification resource the player's OM SDK can expose signals to. IAB's OM SDK page lists OMID 1.6 as the current API docs as of November 4, 2025. vastlint does not speak that API. It checks that the VAST resource pointing at a vendor script is present, secure, and not duplicated into nonsense.

MRAID is not the video spare either

MRAID 3.0 integrated selected VPAID events for in-app video reporting. Teams read that sentence as permission to treat MRAID as the VPAID alternative on mobile. The host is still an app webview. Expandables and playables belong there. A VAST preroll does not become one of them because the apiFramework string changed. If the campaign has both a playable and a preroll, they are two deliveries.

The replacement shape in a VAST 4.3 inline is a media file, an optional SIMID file, and an optional OMID verification. browserOptional is the 4.3 detail on the verification script. Omit the SIMID file when there is no interaction. Omit the verification when nobody is measuring. Do not omit the media file.

Replace the job, not the acronym

• Always leave a media file the player can decode.
• Add SIMID only for a real interaction, as a sidecar.
• Add OMID only for a real measurement vendor, in AdVerifications.
• Treat a remaining VPAID file as legacy HTML5, not as the CTV copy.
• Keep MRAID on the in-app rich-media placement.