Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
not so successful
Grammar usage guide and real-world examplesUSAGE SUMMARY
"not so successful" is correct and can be used in written English.
You can use it when you want to express that something was not as successful as it could have been. For example, "The project was not so successful as we had hoped."
✓ Grammatically correct
News & Media
Encyclopedias
Science
Alternative expressions(20)
unsuccessful
less effective
less fruitful
less successful
not very successful
did not succeed
fell short
met with limited success
partially successful
relatively unsuccessful
not particularly successful
not really successful
not quite successful
not just successful
not yet successful
not only successful
not however successful
not even successful
not too successful
not so subtle
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
50 human-written examples
His splenetic Blair in Tom Stoppard's Hopgood in 1988 was not so successful, but he was already enjoying the Sir Humphrey success and had begun to mellow.
News & Media
Not so successful.
News & Media
Some versions are not so successful, however.
News & Media
Judging by his Twitter feed, he was not so successful.
News & Media
Later novels, not fantastic, were not so successful.
Encyclopedias
They were not so successful in fighting Publius's son.
Encyclopedias
Human-verified similar examples from authoritative sources
Similar Expressions
10 human-written examples
It's launched (successful and not-so successful) protests of companies the internet frivolously deems evil and even started revolutions.
News & Media
But Capernaum's success stories far outnumber its not-so-successful stories- a feat for which Tsitsi is thankful.
News & Media
You've been both not-so-successful, and extremely successful.
News & Media
What separates the successful firms from the not-so-successful ones.
News & Media
But the Irish 'Mr Bigs', such as Dunne and his not-so-successful protector, 'Penguin' Mitchell, quit Dublin for Amsterdam.
News & Media
Expert writing Tips
Best practice
Use "not so successful" when you want to soften the impact of a negative assessment. It implies a lack of complete success without being overly critical or harsh.
Common error
Avoid using "not so successful" in highly formal or academic writing where a more direct and precise term like "unsuccessful" or "less effective" would be more appropriate.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "not so successful" functions as an adjective phrase modifying a noun or pronoun. It describes something that has not achieved the desired level of success, indicating a deficiency or partial failure. Ludwig AI confirms this usage.
Frequent in
News & Media
55%
Science
18%
Encyclopedias
15%
Less common in
Formal & Business
4%
Wiki
4%
Academia
0%
Ludwig's WRAP-UP
In summary, "not so successful" is a grammatically sound and frequently used adjective phrase for describing something that has not fully achieved its intended outcome. Ludwig AI validates its correctness and common usage. While versatile, it is best suited for neutral contexts like news reporting and general discussions. For more formal writing, alternatives like "unsuccessful" or "less effective" may be more appropriate. Use this phrase to soften negative assessments, but avoid overuse in professional or academic settings.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
less successful
Indicates a lower degree of success compared to something else; a direct synonym.
not very successful
Similar in meaning, emphasizing the lack of a high degree of success; a slight weakening of the original.
unsuccessful
A more direct and definitive term indicating a failure to achieve the desired outcome.
did not succeed
A more explicit statement of failure, focusing on the act of not achieving success.
fell short
Implies that an attempt was made but did not reach the required standard or goal.
not a success
Rephrases the concept as a noun, focusing on the absence of success.
met with limited success
Highlights that some success was achieved, but it was not extensive or substantial.
partially successful
Emphasizes that some aspects were successful, but others were not.
relatively unsuccessful
Indicates success only in comparison to other failures.
had limited results
Shifts the focus from success to the tangible outcomes achieved, which were few.
FAQs
How can I use "not so successful" in a sentence?
You can use "not so successful" to describe an attempt, project, or outcome that didn't achieve its goals completely. For example, "The marketing campaign was "not so successful" due to budget constraints."
What's a more formal alternative to "not so successful"?
In formal writing, consider using alternatives like "unsuccessful", "less effective", or "less fruitful" to maintain a professional tone.
Is "not so successful" grammatically correct?
Yes, "not so successful" is grammatically correct and commonly used in spoken and written English to express a lack of complete success.
What's the difference between "not so successful" and "unsuccessful"?
"Not so successful" is a milder way of saying "unsuccessful". It implies a degree of failure but isn't as definitive or harsh. "Unsuccessful" indicates a complete lack of success.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested