Spotify has blocked SongShift from transferring its songs to other services such as Apple Music.

Spotify has contacted music migration service SongShift and threatened to revoke their API access if they don’t stop supporting the move from Spotify to competing services such as Apple Music and Deezer,media Wccftech reported. SongShift allows users to migrate music between different music streaming services while maintaining the integrity of the music library.

Spotify has blocked SongShift from transferring its songs to other services such as Apple Music.

The SongShift team had earlier posted the following on its blog:

The Spotify Developer Platform team proactively contacted us to let us know that we needed to remove the migration from their services to competing music services or revoke our API access for breaching TOS. Although this is not what we want to hear, we respect their decision.

Ironically, as one Reddit user pointed out, Spotify’s privacy policy supports the right to data portability. This means Spotify should respect customers’ requests and freely transfer their data from Spotify to competitive services without any obstruction from the company.

“Data portability – the right to request the electronic reproduction of your personal data and the right to transfer that personal data to another party’s services.”

For SongShift, this means they won’t support a move to Spotify in any future updates. Users can still use the service to migrate data between other services, including Apple Music, Deezer, YouTube Music, Pandora, Last.fm, and more.

Because Spotify doesn’t allow data from its services to be transferred to competitors’ services, it does violate the principles it stands for when it talks about Apple’s policy as anti-competitive. The company is also a founding member of the App Equity Alliance, which has been critical of its biggest rival, Apple.

Spotify is by far the largest music streaming service, followed by Apple Music. It faces a flood of customer complaints to improve its app and repair relationships with music creators by increasing their royalties payments.