There are a few options, and some can be slightly emphasised:

* without help from
* without any help from
* with no help from
* without the help of

Here is the order in which they are commonly preferred (if you click on the image it will be enlarged):

[![enter image description here][1]][1]

 Although [NGram][2] finds instances of ***without the help from***, it is very rare and I wouldn't recommend it.

One more [NGram][3] shows you what prepositions are the most commonly used with both variants, ***without the help*** and ***without help***.

Note: ***with no help*** is the strongest negation which would emphasise the exploit of launching the business alone.


  [1]: https://i.sstatic.net/qCKCi.png
  [2]: https://books.google.com/ngrams/graph?content=without%20help%20from%2Cwithout%20any%20help%20from%2Cwithout%20the%20help%20from%2Cwith%20no%20help%20from%2Cwithout%20the%20help%20of&year_start=1800&year_end=2019&corpus=26&smoothing=3&direct_url=t1%3B%2Cwithout%20help%20from%3B%2Cc0%3B.t1%3B%2Cwithout%20any%20help%20from%3B%2Cc0%3B.t1%3B%2Cwithout%20the%20help%20from%3B%2Cc0%3B.t1%3B%2Cwith%20no%20help%20from%3B%2Cc0%3B.t1%3B%2Cwithout%20the%20help%20of%3B%2Cc0
  [3]: https://books.google.com/ngrams/graph?content=without%20help%20%2A%2Cwithout%20the%20help%20%2A&year_start=1800&year_end=2019&corpus=26&smoothing=3&direct_url=t2%3B%2Cwithout%20help%20%2A%3B%2Cc0%3B%2Cs0%3B%3Bwithout%20help%20from%3B%2Cc0%3B%3Bwithout%20help%20of%3B%2Cc0%3B%3Bwithout%20help%20or%3B%2Cc0%3B%3Bwithout%20help%20and%3B%2Cc0%3B%3Bwithout%20help%20in%3B%2Cc0%3B%3Bwithout%20help%20to%3B%2Cc0%3B%3Bwithout%20help%20I%3B%2Cc0%3B%3Bwithout%20help%20for%3B%2Cc0%3B%3Bwithout%20help%20at%3B%2Cc0%3B%3Bwithout%20help%20he%3B%2Cc0%3B.t2%3B%2Cwithout%20the%20help%20%2A%3B%2Cc0%3B%2Cs0%3B%3Bwithout%20the%20help%20of%3B%2Cc0%3B%3Bwithout%20the%20help%20and%3B%2Cc0%3B%3Bwithout%20the%20help%20or%3B%2Cc0%3B%3Bwithout%20the%20help%20either%3B%2Cc0%3B%3Bwithout%20the%20help%20which%3B%2Cc0%3B%3Bwithout%20the%20help%20that%3B%2Cc0%3B%3Bwithout%20the%20help%20from%3B%2Cc0%3B%3Bwithout%20the%20help%20Of%3B%2Cc0%3B%3Bwithout%20the%20help%20given%3B%2Cc0%3B%3Bwithout%20the%20help%20they%3B%2Cc0