heavily relies on vs heavily relies upon

Both are correct and commonly used phrases in English. They have the same meaning and can be used interchangeably.

Explained by Miss E.
Editor at TextRanch

Last updated: April 03, 2025 • 4888 views

This phrase is correct and commonly used in English.

"heavily relies on"

This phrase is used to indicate a strong dependence or trust in something or someone.

Examples:

The success of the project heavily relies on the team's collaboration.
She heavily relies on her morning coffee to start the day.
The company heavily relies on technology for its operations.
The outcome of the experiment heavily relies on accurate data.
Heavily relies on the support of his family during tough times.

Show examples from the web [+]

Mauritian tuna processors heavily rely on the supply by EU purse seiners of originating tuna under the interim EPA.
Being a small agency, ECDC will heavily rely on the expertise and infrastructures (e.g. microbiological laboratories) in the Member States.
Ensuring a 'safe tourism' is therefore a critical factor for the sustainability of those OCTs economies that heavily rely on tourism.
Each investigation, and to a large extent its results, heavily rely on the cooperation provided by interested parties: namely producers in the Community and in the country concerned, but also importers and users of the product under investigation.
We rely heavily on the input of our agents.
We rely heavily on the input of our agents.
You may feel it wise to rely heavily on local knowledge.
KWLA relies heavily on such stories.
All are lacking adequate financial means and rely heavily on voluntary work.
Grassroots and amateur sporting organisations rely heavily on volunteers.
This project relies heavily on the development of high-speed Internet infrastructure.
The development of this international cooperation is likely to rely heavily on exchanges of personal data.
The framework relies heavily on information that the ECB collects from NCBs in accordance with this Guideline.
We still rely heavily on intergovernmental activity.
He's basically a bruising and brawling sort of fighter who relies heavily on 19th century ogre battle systems.
The second thing you should know is that my act relies heavily on juggling.
Organisations with small incomes rely heavily on non-remunerated volunteers and the free use of facilities such as conferences, translators, etc.
The state's case against him relies heavily on circumstantial evidence... and a third acquittal has already been predicted.
The second bloc comprises countries whose industry is much less efficient in energy terms, as it relies heavily on carbon.
It will remain essential in the coming years, as most of our neighbours and emerging economies rely heavily on nuclear power in order to satisfy their energy needs.

Alternatives:

strongly depends on
heavily depends on
relies heavily on
depends heavily on
counts heavily on

This phrase is correct and commonly used in English.

"heavily relies upon"

This phrase is also used to indicate a strong dependence or trust in something or someone, similar to 'heavily relies on.'

Examples:

The success of the project heavily relies upon the team's collaboration.
She heavily relies upon her morning coffee to start the day.
The company heavily relies upon technology for its operations.
The outcome of the experiment heavily relies upon accurate data.
Heavily relies upon the support of his family during tough times.

Show examples from the web [+]

Mauritian tuna processors heavily rely on the supply by EU purse seiners of originating tuna under the interim EPA.
Being a small agency, ECDC will heavily rely on the expertise and infrastructures (e.g. microbiological laboratories) in the Member States.
Because he relies upon science to transform one person into another.
Species identification will partly rely upon the duration of one syllable usually in milliseconds.
However... commerce here relies upon her.
So I Find Myself Compelled To Rely Upon Your Good Judgment And The Support Of This...
A good king relies upon good advice, Uhtred.
We've got Adam's instincts to rely upon.
The Captain would be ill-advised to rely upon my judgement.
The fight against violence and exclusion relies upon it.
If saving cetacean species from extinction relies upon the International Whaling Commission, then there is no hope.
And life, when organized into species, relies upon genes to be its memory system.
We have only one another to rely upon.
And that you rely upon them.
Every family in this village relies upon their leazings.
In recognising each other's judgments, we must be able to rely upon the quality of the legal systems, rely upon equal treatment, rely upon effective due process and rely upon fair trials with counsel and, if need be, interpretation.
Dear colleagues, the development of the information society relies upon the electronic communication networks and services.
Cohesion policy relies upon good governance at European, national, regional and local level.
Furthermore, the applicants rely upon infringement of Article 43 of the Staff Regulations.
The applicant relies upon fourteen grounds in support of its claims.

Alternatives:

strongly depends upon
heavily depends upon
relies heavily upon
depends heavily upon
counts heavily upon

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heavily relies on vs heavily relies upon

"heavily relies on"

"heavily relies upon"

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