Hi

To identify the best way of promotion You have to do some analysis: Target Audience (Needs, Preferences, Location, Industries, Segments, Tiers, Decision Making Persons), Product Value Proposition, Marketing & Sales Pitch deck (why this software is better vs existing), Pricing Strategy, After that You have to identify Branding Approach to differentiate it from existing solutions, Awareness and Trial Promotion campaign, preparation of highly-engaging viral content to generate WOM, PR articles, finding niche influence experts, direct campaigns preparation, create some contests for the first users, create the groups in Social Media. Good to consider: targeted ads campaign. Please contact me if You need more information.