Private funds like banks, financial institutions, and investment companies are very rarely involved in actively managing the business (thus, giving you the autonomy of conducting your own affairs in the manner you deem best) as their main purpose is to receive an attractive return (usually in the form of high interest from 7-12%) on their investment. Thus, businesses that are already established, have a good credit track record, are already generating revenue in high amounts, and have high growth potential would benefit from such sources, and not start-ups in early-stage growth.
In Singapore, however, there are micro loan programmes instituted by the Singapore government under the auspices of Spring Singapore and IE Singapore that facilitate your taking of small loans from participating financial institutions like UOB, OCBC, DBS, Standard Chartered banks.