A Look at Some of the Top Scuba Diving Agencies

If you’re interested in becoming a scuba diver or expanding your dive training you’ve probably already done your research and stumbled across the wide variety of dive training agencies. Given that there are over 150 different certification agencies, for a first-timer, it can be very confusing trying to decide which organization to pursue your diving education with.

What is a Scuba Training Agency?

As a sport, scuba diving doesn’t have one centralized certifying or regulatory agency. Many agencies play a role in educating divers and regulating the sport as a whole. Over the years, these certification agencies have set the bar and developed training procedures and safety protocols as a standard for scuba divers everywhere.

In the beginning stages of your recreational scuba diving training, many divers will find that regardless of the agency, dive courses are relatively similar across the board, with a few minor variations. The more significant differences arise when divers jump to the professional or technical diving level, where some agencies do not recognize each other’s qualifications.

Joey And Ali Gazing Out Into The Ocean Of Greece Thinking About Which Scuba Certification Agency Is Best

Important Note: While selecting a diving agency is an essential step in getting your dive certification, nothing is more important than having an instructor with experience, a good attitude and a keen mind for safety, even if this means going for your alternate choice of agency. The course will only be as good as the instructor who teaches it!


4 Scuba Certification Agencies: SEI, PADI, SSI and NAUI

Of the alphabet soup of dive agencies to choose from, there are a handful of agencies that have surpassed the masses. RAID, SDI, SEI, PADI, SSI and NAUI are only a few certification agencies with a strong history of recognition, but before throwing on that scuba tank and diving into the water, it’s worth learning more about these top agencies to decide which one might be best suited to certify you.

Here is an overview of the 4 scuba agencies that have certified us:

Four Scuba Diving Certification Agencies SEI, PADI, NAUI And SSI

Scuba Educators (SEI):

Scuba Educators, is a scuba diving certification agency that specializes in supporting independent instructors. Their aim is to teach the next generation of divers to be safe, comfortable, and relaxed beneath the surface. SEI divers come from all over the world and all walks of life sharing the common thread of this amazing sport paired with quality education.

Ali Showing Off Her New Scuba Educators Divemaster Certification

SEI History

Scuba Educators traces its roots back 60 years to the very first days of underwater exploration. This scuba diving certification agency stems from the YMCA scuba and skin diving program. In 2008, a group of former YSCUBA instructors Ken Nemeth, Dan Marelli and Tom Leaird banded together to create Scuba Educators – a new high standard scuba education agency with no connection to the YMCA. In 2011 the agency further expanded by purchasing and merging with the first SCUBA instructors college in the United States, the Professional Diving Instructors College (PDIC).

As a continuation of their dedication to quality scuba education, Tom Leaird now serves as Scuba Educators Director of Education alongside President Ben Brown and Vice President Cam Byrd.

Some Interesting SEI Facts
  • Scuba Educators trains their divers with the longest course in the industry and the most pool time.
  • The Scuba Educator owners dive regularly with their instructors and actively work at building a strong community.
  • Everything Scuba Educators does as an agency is designed to support their instructors in educating divers.


Professional Association of Dive Instructors (PADI):

The Professional Association of Dive Instructors, or PADI for short, is the largest scuba diving organization in the world. PADI is a for-profit corporation with an international scope, making underwater adventures possible while maintaining a high standard for diver training, safety, and customer service. The PADI scuba diving courses focus on the student’s needs, providing maximum practice and realistic real-world applications.

PADI’s scuba diving lifestyle is represented by the “4 E Philosophy”:
  1. Education – From learning to dive to expanding on your capabilities, PADI’s courses cover everything from making diving a recreational hobby to turning scuba into a profession
  2. Experience – By learning through practice, become the best diver you could be and make friends in the scuba diving community
  3. Equipment – Find out what’s new in the scuba gadget world and keep yourself up to date with the most modern equipment safety features
  4. Environmental Conservation – learning to protect our fragile aquatic ecosystem one dive at a time

Scuba Diver Ali Holding Her PADI Diver Certification Beside The Ocean In Canada

PADI History

The Professional Association of Dive Instructors made a splash into the diving world in 1966 by two friends in Illinois. Scuba equipment salesman John Cronin and his friend Ralph Erickson, a swimming instructor and educator, developed PADI hoping to give future divers a chance to enjoy the underwater world by instilling solid, instructionally relevant training that would lead to more confident and recurring divers.

Early on, PADI grew slowly starting in restaurants and even the basement of Mr. Cronin’s home. PADI’s first milestone arrived in 1967 when the association introduced the first recreational diving certification requirements, the first advanced scuba diver course, and the first specialty diver program. In the late 1960s, the organization was still a struggling entity with only 400 members.

It took 20 years of hard work but finally by the late 1980’s PADI’s vision had grown into the leading scuba diver training organization in the world.

Some Interesting PADI Facts
  • Project Aware was established by PADI in 1989 as a global movement for scuba divers to protect our ocean planet.
  • For the past 20 years, PADI has averaged over 900,000 scuba diving certifications per year.
  • PADI offers recreational training and a few variations of technical dive training.

The PADI Wreck Diver Course Theory And Dry Land Training

Scuba Schools International (SSI):

Scuba Schools International, also known as SSI, is a retail-based organization. They are leaders in not only scuba diving but freediving, snorkeling and swimming as well. Bringing people together through communication and cooperation, SSI is a trusted name in the diving world that attributes their success to their high standards and focused methodology.

SSI is a strong believer in the scuba diving diamond:
  1. Knowledge – Being well versed in scuba diving information makes for safe and knowledgeable future divers.
  2. Skills – By gaining comfort through repetition, SSI hopes that safe scuba diving skills will become a student’s second nature.
  3. Equipment – Familiarizing yourself with the dive equipment will ensure you enjoy every minute of your dive.
  4. Experience – SSI seeks to encourage students to go above and beyond the minimum number of required course dives. The more dives a student can make the better they will become.

SSI Scuba Diving Certification Card Near The Ocean, Scuba Agency Overview

SSI History

Scuba Schools International is a watersport organization that was first started in 1970 by Robert Clark. After its establishment, SSI became the first scuba organization to present a full training program including video. In the 40 years that followed SSI’s creation, the company expanded and was acquired by Doug McNeese and Robert Stoss, two high profile people in the diving industry and then by MARES in 2014.

Now SSI is represented in more than 110 countries with over 2,800 International locations and has materials printed in more than 30 languages.

Some Interesting SSI Facts
  • SSI headquarters are in Boca Raton, Florida
  • SSI offers both recreational and technical dive training.

Joey And Yle At The Shoreline Gearing Up In Scuba Diving Equipment In Zihuatanejo, Mexico

National Association of Underwater Instructors (NAUI):

The National Association of Underwater Instructors is a not-for-profit organization known for its exceptional training standards for recreational and tech diving. A company that prides itself on the educational aspect of diving, well-known organizations such as; Disneyland, NASA and the US Navy Seals have used NAUI for their dive training programs.

NAUI Scuba Diving Certification With Joey Near The Water, Canada

NAUI History:

The National Association of Underwater Instructors was brought to life by the perseverance of Al Tillman. While he worked as a sports director for the Los Angeles County Parks and Recreations, Mr. Tillman established a well-crafted training program geared towards certifying scuba and skin divers through the county.

In 1955, Al Tillman’s dream grew into the world’s first civilian diver training agency as he and a fellow peer from Scripps Institute of Oceanography, Conrad Limbaugh, held the first Underwater Certification Course (1U1CC). From there, thanks to the growing number of scuba certification request, Al and Conrad began granting Provisional Certificates to dive instructors across the L.A country.

As the interest and participation in the sport of recreational diving grew, in 1959 the National Diving Patrol was renamed the National Association of Underwater Instructors or NAUI as we know it today.

Some Interesting NAUI Facts
  • Al Tillman one of NAUI’s founding father, was the first instructor from this program
  • Captain Jacques-Yves Cousteau sat on NAUI’s first board of directors
  • NAUI offers both recreational and technical dive training.

Technical Dive Mike On The Lord Strathcona Shipwreck In Newfoundland, Scuba Diving Canada


Deciding on which agency to go with can certainly be a daunting task, and every certified diver will have their own opinion on which agency is best. Between SEI, PADI, NAUI, and SSI, while each company has a similar vision – to get people in the water scuba diving – each agency goes about its instructing in a slightly different way.

When considering which professional to use, take a look at your long term goals, learning style, instructor preference, and location. These are often key factors that influence a student’s agency choice. And at the end of the day, the most important thing to realize as a beginner diver, or student furthering their knowledge, no matter which organization you end up choosing, make sure you are safe and having FUN!

A Team Of Scuba Divers After Completing Their Advanced Open Water Certification With The PADI Scuba Diving Agency

Dive peeps, what is your number one choice of scuba diving association and why did you select them?

Writers Note: This post may contain affiliate links. We will make a small commission if you make a purchase through one of these links, at no extra cost to you. See full disclosure and disclaimer policy here.

PADI Vs NAUI Vs SSI Vs SEI Pinterest

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Read 6 comments...
  • Avi Ratica
    October 5 2020

    SSI is no longer based in Colorado. It is now in Boca Raton Florida.

    • Alisha Postma
      October 6 2020

      Thanks for letting us know – I’ll make changes to the post to reflect that!

  • Thomas Baker
    October 5 2020

    I heard from a instructor in MN say that the owners of SEI arent even instructors. like how can you set standards when you aren’t even an instructor.

    • Alisha Postma
      October 6 2020

      Hi Thomas, I understand every diver will have their own opinion with regards to certification agencies and which one is best, however, SEI was created from the already existing YSCUBA program run by instructors Ken Nemeth, Dan Marelli, and Tom Leaird. I am curious… have you or your MN instructor taken any of their courses, looked at any of their manuals or reviewed any of the material?

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