Your question of "What should be the product marketing strategy for a firm who is in early phase of business & not funded?"
Here are some steps (I am sure you have already done some of these). I have highlighted multiple steps here - including sales and marketing. So pardon me if I don't sound like a puritan!
* I presume your product is generally good, addresses several pain points of the vertical(s) you're serving and is fairly competitive (WRT features and pricing).
* Have a clean website - listing your products and services, ensure you have several relevant keywords on the pages and ensure you appear on various Internet search results.
* Define the geography where you're selling - India, Asia, Asia-Pacific, USA etc. Ensure the product(s) are localized.
* Run some online advertisements (Google / MSN / Yahoo Search Marketing) (paid for and fairly cost effective)
* List yourself in some relevant Internet directories (paid and free)
* Offer free demos / free evaluation copies of the product / free subscription for limited time
* write and publish some relevant white-papers ideally highlighting your products and how they generally compare with others equivalent / prevalent products. Case studies shall come later once you have one or more clients.
* Start harvesting relevant "cold" prospects
* Start e-mail campaigns with the above prospects, start harvesting "warmer" prospects from here. Repeat these 2 steps.
* The key is going to be getting that first client for each one of your products, then to get the 2nd and so on. Please don't think about funding until you have a few clients and have a proven set of products and not just done some academic exercise between 4 walls. I see having the first client as a "paradigm shift" as you're going to feel so good and will have a clearer scope for the future.
* Keep a clear pricing policy, a rough road map for all the products - once you have one or more clients the road map would have to be adjusted to address their current and future needs and beyond.
* Don't be surprised if your product(s) look different a year or two from now from where you started after signing up a handful of clients.
* Let me warn you, it is not going to be easy but I suggest you persist!
* Please note there is a paradigm shift between reading about swimming and actually swimming, so you just need to jump into the water (and start swimming) however cold it may seem! Make sure there is some one around to rescue you if you drown!
* Please note you need to figure out an optimal path for yourself as you move forward, there are no cook books for what you should do next from a given point as the path is different for each. There are several pitfalls and mine-fields where you can blow yourself up but you have to work hard to ensure you make lesser number of mistakes than successful moves to keep afloat and to continue moving forward.
* This is kind of what we did and we have 40 clients now from the USA and India after a handful of years!
Hope this helps, Good luck, Amrit!
Regards,
Siva