مزود خدمة الإنترنت يقارن الاشتراكات.

This is a chain of iḍāfa constructions, often called a genitive/possessive construction.

Break it down like this:

• مزود خدمة الإنترنت
• مزود خدمة = provider of a service / service provider
• خدمة الإنترنت = internet service

So the whole phrase literally builds as:

• مزود = provider
• خدمة = service
• الإنترنت = the internet

Together: provider [of] service [of] the internet
In natural English, that becomes internet service provider.

A key rule in iḍāfa:

• the first noun usually does not take ال
• the following noun(s) can be definite or indefinite depending on meaning

Because الإنترنت is definite, the whole phrase becomes definite in meaning.

Because مزود is the first term of an iḍāfa. In Arabic, the first noun in an iḍāfa normally does not take ال.

So you get:

• مزود خدمة الإنترنت = the provider of the internet service / the internet service provider

Even without ال on مزود, the whole phrase can still be definite because definiteness comes from the end of the iḍāfa chain, here الإنترنت.

Compare:

• كتاب طالب = a student’s book / a book of a student
• كتاب الطالب = the student’s book

So مزود does not need ال here.

مزود is a noun meaning provider or supplier.

It comes from the verb زوّد = to provide, supply, equip.

So:

• زوّد = he provided
• مزود = provider / supplier

In this sentence, مزود is not a verb. It is a noun serving as the subject of the sentence.

You may also sometimes see it written with full vowel-related marking as مُزَوِّد.

يقارن is an imperfect verb (often corresponding to present tense in English): he compares or is comparing.

It comes from the verb قارن = to compare.

Pattern:

• قارن = he compared / to compare
• يقارن = he compares / is comparing

The يـ at the beginning often marks:

• he
• sometimes it
• or you (formal feminine singular), depending on context

Here, because the subject is مزود خدمة الإنترنت, it means:

• The internet service provider compares ...

Because the verb agrees with the subject, not the object.

In this sentence:

• مزود خدمة الإنترنت = subject
• يقارن = verb
• الاشتراكات = object

The subject مزود is singular, so the verb is singular: يقارن.

The plural noun الاشتراكات is what is being compared, not the one doing the action.

Because it has الـ, so it means the subscriptions rather than just subscriptions.

• اشتراكات = subscriptions
• الاشتراكات = the subscriptions

This often suggests that the subscriptions are specific or already known from context.

Also, as a direct object, it is perfectly normal for it to be definite.

The singular is اشتراك, meaning subscription.

So:

• اشتراك = subscription
• اشتراكات = subscriptions

This is a common sound feminine plural in form, using -ات, even though the singular noun is not feminine in the everyday sense. Arabic often uses -ات to form plurals for many non-human nouns and abstract nouns.

So the pattern here is:

• singular: اشتراك
• plural: اشتراكات

Arabic allows both verbal sentences and nominal sentences.

Here the sentence starts with the subject:

• مزود خدمة الإنترنت يقارن الاشتراكات

This is a perfectly natural structure, especially when the sentence is about who is doing the action.

You could also see a verb-first version such as:

• يقارن مزود خدمة الإنترنت الاشتراكات

Both are grammatical. Very roughly:

• noun first can feel a bit more topic-focused
• verb first is a very common default verbal order in Arabic

For learners, it is useful to know that Arabic word order is more flexible than English.

Yes. In fully vocalized formal Arabic, the words would have case endings, but they are usually omitted in normal writing.

A full formal reading could be:

• مزوِّدُ خدمةِ الإنترنتِ يقارنُ الاشتراكاتِ

Very roughly:

• مزوِّدُ = nominative, because it is the subject
• خدمةِ = genitive, because it is in iḍāfa after مزود
• الإنترنتِ = genitive, because it is the second part of the next iḍāfa
• يقارنُ = indicative
• الاشتراكاتِ = accusative, because it is the direct object

In everyday printed Arabic, these endings are usually not shown, but they are still part of the grammar.

Yes, the l in ال is pronounced here.

That is because إ in الإنترنت is not a sun letter. So this is a moon-letter word, meaning the ل of ال stays audible.

So it is pronounced roughly as:

• al-internet

not with assimilation like you would hear in words such as:

• الشمس pronounced ash-shams

So here:

• الإنترنت → the l is pronounced

It can mean either, depending on context.

The Arabic imperfect often covers several English present-time meanings, including:

• compares
• is comparing
• sometimes even does compare in the right context

So without more context, يقارن can be understood as a general present or an ongoing action.

That is very normal in Arabic: one form often corresponds to multiple English present-tense translations.