Our company is in the first tier of the IT industry.

One year ago, it was the first in the area of local life(?) services region.

"region" is very much tied to specific real places. "area" can be used more metaphorically to mean things like "the business we focus on", which I think is what you meant.

I'm not fully sure what you mean by "local life services" however.

Up to one year ago, many internet giants have tried to competed with it, but no one defeated it.

"have tried to" already makes that clause past tense, but when you're describing what they were trying to do, that goes in the present tense. It's complicated, I know.

Most people had trustbelieved that our company would constantly be the first in the next 5 years, or even more years.

However, since Q1 2025 JingDong and Alibaba declared war withon our company one after another.

We were so busy to copecoping with the warcompetition.

"so busy to" doesn't quite make sense, it could be "too busy to cope" which means you didn't have time to do it, or "so busy coping" which just indicates that it made you very busy but doesn't imply whether you succeeded or failed.

Last week, Alibaba declared that they had the decision of grabbintend to grab first place ing the first inarea of local life services region.

"had the decision of grabbing" ends up sounding overly wordy and hence unnatural. "they intend to grab" / "they decided to grab" are shorter and more active, so sound more natural in English.

One year ago, it was the first in the local life services region.

Up tountil one year ago, many internet giants have tried to competed with it, but no one defeated it.

Most people had trusted that our company would constantly be the first, even in the next 5 even more years.

However, since Q1, 2025 JingDong and Alibaba declared war with our company one after another.

At first, JingDong didn't capture much market share, but two months later, Alibaba started a much stronger attack and captured lots of market share.

Last week, Alibaba declared that they had the decision of grabbing the first in the local life services region.

Our company is in the first tier of the IT industry.

Article usage.

One year ago, it was the first inleader in the local life services region.

Add a space after the comma.
“Leader in the local life services sector” is more natural

Up to one year ago, many internet giants have tried to competed with it, but no one defeated it.

Use “tried to compete”
Also, “none” is smoother than "no one"

However, since Q1 2025, JingDong and Alibaba have declared war withon our company one after another.

Add a comma after “Q1 2025.”
Use “declared war on” instead of “with.”
Present perfect (“have declared”) fits better with “since.”

We were so busy to copecoping with the war.

Use “coping with” instead of “to cope with.”

Up toBy August 2025, Alibaba and our were company nearly were neck and neck.

“By August” is more natural.
Remove “nearly” before “were” for smoother phrasing.

Our company is in the firhighest tier of the IT industry.

"First" is okay, but when talking about tiers, it sounds more natural to talk about higher and lower tiers.

One year ago, it was the first in local life services region.

I'm not sure what "local life services region" means. Do you mean that it was "ranked first in the area of local life services"?

Up to onentil last year ago, many internet giants haved tried to competed with it, but no one defeated it.

Most people had trusted that our company would constantly be the first in the next 5 even more yearsyears, or even longer.

We were so busy to copecoping with the war.

Last week, Alibaba declared that they had the decision of grabbing the first in local life services region.

Once again I'm not sure I understand what "grabbing the first in local life services region" means.

Our company is in the first tier of the IT industry.

One year ago, it was the first in the local life services region.

Most people had trusted that our company would constantly be the first in the next 5 or even more years.

However, since Q1, 2025, JingDong and Alibaba declared war with our company one after another.

We were so busy to copecoping with the war.

Last week, Alibaba declared that they had the decision of grabbing the first in the local life services region.