Businesses are in the game of making money. Big or small doesn't matter.

If your services are going to either make their lives easier or make them more money. The best way would be to, reach out to a decision maker.

The following 2 worked best for me, when I sold to companies like OLX, Quikr, TVS among others

Cold Emails
Send 5 emails ( 1 every 7 days) per person. Also, when you are reaching out make sure you reach out to at least a 150 of them every month. You would have a better chance of generating a meeting.

References
The best way though would be if some one can connect you directly to the said decision maker.