SEO growth strategies backed by 400 scientific tests

We design and implement SEO campaigns for business owners and marketing teams in high growth organisations.

Leading advertising & marketing agency

"We've seen our website sales increase meaningfully."

We are a top multilingual SEO company

"I can completely trust them to make the right decisions."

We are a top SEO company in Arizona

"They put a lot of effort in making my site the best it can be."

We are a top SEO company in Arizona and Germany 

" I wouldn’t hesitate in recommending HV for all things SEO"

Science-based SEO


"They offered tangible data and were very transparent."

You're in safe hands with us.

Our team of in-house specialists work in flow like an orchestra to deliver powerful, safe, long-term growth that your business can count on.

Hiring HV SEO was a great decision.. Their documentation and deliverables are the best I’ve seen from any SEO agency, period.

Steve Toth

Lead SEO, Freshbooks

Behind the scenes of many high-growth brands

Focus is key.

Unlike most digital agencies, we exclusively do SEO, it's our bread and butter! We specialize in:

  • Multi-language
  • SaaS
  • Fintech
  • Ecommerce
  • Crypto
  • National brands
  • Manufacturing

Partner with the team who live,

eat & breathe SEO.

  • We test

  • We teach

  • We are white hat

  • We love science

Google doesn’t publish their list of ranking factors in the algorithm. SEOs can either run tests, or they can just guess...

HV has conducted over 400 tests to learn how Google's algorithm actually works. In fact, HV holds a US Patent for a proprietary system used for isolating single factors in Google's algorithm. So whether you choose to work with HV or not, it pays to ask your SEO whether they test or guess.

What our clients say

Trusted by 200+ companies worldwide

How many ways can I say AWESOME!! Not only do they know what they are doing, High Voltage goes above and beyond to make sure they understand me and I understand them. Make the call!!

Brook Thibault
Founder, Coastal Virginia Law

HV were able to secure us articles & links in Reuters, Forbes, USAToday and, something other firms were not able to achieve.

Jeff Stahlnecker
Head of Development, MXC

10 star review for HVSEO! We can't recommend them enough.
One of the best agencies we've worked with. Fantastic team and outstanding work. We've seen huge progress and traffic to our site since bringing them on board. If you're looking to step up your SEO game, look no further!

Saleema Patel
CMO, Cashero

We have worked with HVSEO team for 2 years. They are the most professional, practical and results driven SEO team we have ever worked with and we are happy to endorse their services. They take a practical commercial view and deliver long term sustainable results as well as being proactive in finding opportunities for improvement.

Marcus Hancock
CMO, Intersport

Merry People have been using HV for the past 12 months and the team have done amazing work to improve rankings for our two websites across a variety of search terms and geographies. HV take the time to understand your business, analyse in depth keyword research and page optimisation insights to create compelling ranking content. Not just a partner, HV takes you on the SEO journey and educates on industry best practice. I wouldn’t hesitate in recommending HV for all things SEO.

Tim White
Head of Operations, Merry People

HV were brilliant! They helped us identify low hanging fruit keywords using their Compound SEO. This gave us a huge advantage and stopped us wasting time & money publishing content that we would never rank for.

Dominic Gluchowski
CMO, Coinjar

The HV team are experts. They explained what had to be done and why. Their work resulted in strong growth that had an overall positive impact on our business.

Phil Forbes
Marketing Manager, Packhelp

The HV SEO team has been excellent to work with. They have a scientifically tested approach to SEO and executed it flawlessly. Our project was well planned and expertly monitored; they produced high-quality content that is valued by our market which has made a positive impact on our traffic. In the six months that we’ve worked with HV SEO our organic traffic has grown by over 100%. I would highly recommend engaging HV SEO.

Steve Lugtigheid
Marketing Director, DistillerSR

Why 50% of companies fail at SEO

Why 50% of Companies Fail at SEO?

And how not to be one of them.

And how not to be one of them.

Specialty SEO services.

100% in-house.

We are a full service team of SEO specialists who’ve been innovating and implementing powerful, White Hat, tested SEO programs since 2014.







Conversion rate


Big Data Keyword






Scientific on-page


Not ready to commit to a

full program?

Talk to us about our 60 day SEO sprints!