Ayatollah Ali Khamenei
Iran's supreme leader Ayatollah Ali Khameini lashes out at the US regularly to over 100,000 followersGetty Images

Ayatollah Ali Khamenei, Supreme Leader, Iran

@khamenei_ir

In power since: June 1989

On Twitter since: March 2009

Followers: 116,000+

Iran's Supreme Leader has been the man of the moment during the nuclear talks between the US, Europe and Tehran, lashing out at US President Barack Obama and US Secretary of State John Kerry as "liars" and "arrogants" even as Iranian diplomats sat alongside them in Switzerland hashing out a deal.

But we also occasionally get to see Khamenei's lighter side...

The President of Azerbaijan Ilham Aliyev
Ilham Aliyev, the autocrat president of Azerbaijan, vents his ire at neighbouring ArmeniaGetty

2. Ilham Aliyev, President of Azerbaijan

@presidentaz

In power since: August 2003

On Twitter since: May 2010

Followers: 137,000

Aliyev, who took over as president in 2003 (from his father) and has 'won' every election since, uses Twitter mainly for lashing out at Armenia, which the country went to war against four times during the 20th century and still has no diplomatic relations.

He is a prolific tweeter, known for long and vitriolic rants against his neighbour interspersed with comments about religion and Azeri oil and gas projects.

Venezuela anti-US
Venezuela's President Nicolas Maduro is a profilif Tweeter despite only joining the social netowkr a year agoJorge Silva/Reuters

3. Nicolas Maduro, President of Venezuela

@maduro_en

In power since: April 2013

On Twitter since: May 2013

Followers: 2.32m

Nicolas Maduro replaced Venezuelan leader Hugo Chavez in April 2013 and joined Twitter a month later, continuing the late firebrand socialist's agenda of opposition to the US and Obama and championing of the country's workers' movement.

He too is a prolific Twitter user, racking up 17,500 tweets and over two million followers in less than two years, many of them recently dedicated to persuading Obama to lift sanctions against Venezuela, a petition for which has been signed a staggering 10m times.

United Arab Emirates' Prime Minister and Ruler of Dubai Sheikh Mohammed bin Rashid al-Maktoum takes a tour inside an Airbus A380 aircraft during the Dubai Airshow (Reuters)
United Arab Emirates' Prime Minister and Ruler of Dubai Sheikh Mohammed bin Rashid al-Maktoum has the kind of Twitter following that would make other rulers green with envyReuters

4. Sheikh Mohammed al-Maktoum, Ruler of Dubai

@HHShkMohd

In power since: February 2006

On Twitter since: June 2009

Followers: 3.85m

Sheikh Mohammed - or Sheikh Mo as he is affectionately known in the UAE - has the kind of Twitter profile that his fellow leaders could only dream of, with almost four million followers.

His tweets, a mixture of Arabic and English, are not going to set the world on fire, most relating to announcements of transport projects or media initiatives, rather than tirades against his rivals.

That said, if you like pictures of Sheikh Mo having fun with his mates...

... or staring down robots...

... then you can't go wrong.

Vladimir Putin Nuclear
Putin's Tweets are about as interesting as this meeting looksReuters

5. Vladimir Putin, President of Russia

@PutinRF_Eng

In power since: May 2012 (Also 2000 - 2008)

On Twitter since: November 2012

Followers: 233,000

Wade through the slew of spoof accounts to find the true Vladimir Putin, where everyone's favourite Russian leader announces everything from press conferences to policy.

Unfortunately Putin's Twitter activity isn't as brash as his foreign forays, and mainly consists of pictures of the Russian president with various leaders - rather than, as you might imagine, pictures with his shirt off.

One of the better parody accounts dedicated to the Russian leader is @Putin, which portrays a leader more akin to how we may imagine him.