Tommy Robinson has claimed his Instagram account has been deleted, in what may be the latest move in a crackdown against far-right figures by social media companies.

“They have now deleted my Instagram account. Facebook will soon close us down,” Robinson, who has just been released from prison, told his Facebook followers.

He also posted a mobile phone screengrab showing an Instagram page in the name of “realtommyrobinson”, with a banner message saying: “User not found.”

Instagram – which is owned by Facebook – has not yet responded to Robinson’s claims. Robinson, whose real name is Stephen Yaxley-Lennon, led a protest in central London in March after he was banned from Twitter for breaching the site’s rules on hateful content.

His claim came on the day that Facebook, Apple, YouTube and Spotify banned content by Alex Jones, an American conspiracy theorist whose Infowars brand reaches millions.

Earlier this year, Facebook also removed the official page of the far-right group Britain First, as well as those of its leaders Paul Golding and Jayda Fransen, in what the social network said was a response to repeated violations of its rules.

Robinson was freed from prison last Wednesday after three judges in London quashed a contempt of court finding made against him at Leeds crown court in May. They granted him conditional bail from a 13-month jail sentence, pending new proceedings at the Old Bailey.

He had been held at Onley jail near Rugby after receiving a 13-month sentence for breaching reporting restrictions at Leeds and Canterbury crown courts by broadcasting a Facebook live stream in which he taunted defendants entering court.

There is a chance that he could again be jailed over the allegations, with appeal judges ordering a retrial at the Old Bailey.

After founding the English Defence League, an anti-Islam movement, in 2009, Robinson has in recent years again become a figurehead for Britain’s far right. His videos on Facebook and YouTube have been watched millions of times and more than 630,000 signed an online petition calling for his freedom that was translated into French, Spanish, Dutch, Italian, Polish, Czech and Russian.

The Middle East forum, a rightwing American thinktank, said it spent a five-figure sum on Robinson’s defence. A number of other rightwing groups were also said to have contributed.