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.

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