Parler was popular among many of the US right-wing, but when dark last month as ISPs withdrew support. One of the issues was that the site failed to monitor violent content related to the January 6 attack on the US Capitol, the nation's legislative seat, by supporters of then President Donald Trump.

The new lawsuit filed by Parler accused Amazon of defamation and breach of contract. But this is the second time that Parler has dusted off its briefs against Amazon. Parler sued Amazon, accusing it of making an illegal, politically motivated decision to shut it down to benefit Twitter but a US judge rejected its demand that Amazon restore services for the platform later in January.

A month later, Parler re-launched its services online and said the new platform was built on "sustainable, independent technology".