The best mural companies with top ratings that specialize in graffiti art and large scale branded murals.  In 2020, commercial graffiti and aerosol art has become a huge worldwide industry.  Many Fortune 500 companies are now hiring graffiti and street artists to create custom pieces in their corporate offices and for ad campaigns.  Everyone from small businesses to high-end property owners are commissioning  mural artists with graffiti roots for all kinds of projects.  With that said, we researched hundreds of graffiti companies out there and ranked some of the world’s best mural companies and graffiti art companies.
1. Graffiti Arts | https://graffiti-artist.net
United States (Nationwide and International Availability)
Graffiti LA Los Angeles Headquarters Site: https://la-graffiti.com
Graffiti Chicago Chicago Headquarters Site: http://chicago-graffiti.com

Started in 2011, Graffiti Arts quickly became the leading mural company and graffiti art consultants in the United States.  The key to their success is not only their talented artist roster but their ability to work professionally and be one of the most reliable companies around.  They are fully insured and have a network of national artists.  This is why many industry-leading companies have chosen to work with Graffiti Arts.  Some clients in their impressive portfolio include New Balance, LinkedIn, Nike, Facebook & Google.  Graffiti Arts has been featured on an episode of ABC News Nightline.  The mural artists & graffiti artists that work with this agency are some of the world's best and actually choose to remain anonymous.  Per their website: “You could be working with Banksy and not even know it.”
2. Mural Art & Consulting  | https://muralartist.co
United States (Based in New York, NY & Los Angeles, CA with Global Availability)

Mural Art & Consulting (a new venture by the previous owners of Klughaus) is another US based branded art agency that provides an extensive portfolio of top name street artists & graffiti artists to choose from.  Unlike many of the other mural companies that do work in house, Mural Art & Consulting connects big name street artists & graffiti artists with brands who are looking to feature a specific artist(s).  From painting large scale OOH ad billboards in Time Square to helping a boutique hotel graffiti their own lobby for a demolition party, Mural Art & Consulting works on a lot of fun and exciting projects that pushes the limits of what is possible with graffiti art & street art.
3. Graffiti Murals Australia| http://graffitimurals.com.au
Australia (Based in Brisbane, AUS)

Graffiti Murals has some of Australia’s best street and graffiti artists for hire. They have completed countless graffiti mural commissions, from Local Cafes and Bedroom Walls to the interiors of Government Buildings. Each artwork is original, hand painted and designed to a client’s brief. Their team of skilled graffiti artists are highly regarded for the quality of artworks and professional manner.
4. Graffiti Life UK| http://graffitilife.co.uk/
United Kingdom (Based in London, UK)

“Professional graffiti and street artists for hire across the UK. We’re proud to have carved our niche as the country’s number one creative force offering the finest graffiti and street art services, with a fresh perspective on every project. We’ve had the pleasure of working with an impressive client list and offer something you simply cannot find elsewhere. We regularly assist big brands in delivering their message in a unique and modern way. Our artists and project managers are directly in sync with one another and we have extensive expertise and experience in delivering commercial graffiti and street art projects from diverse briefs.” Graffiti Life UK is exceptionally talented at creating photorealistic murals.
5. Graffiti NY
United States (Based in New York, NY)

 This is the other big graffiti company & mural company based in NYC.  The artist is very talented when it comes to traditional graffiti art and interior high-end murals.   They seem to be available for work all over the United States.  They are known for a more urban/street style with that graffiti edge.  (Update: As of 2017, this company has joined forces with Graffiti Arts.)