This answer would look different, if the question would have been
“how to acquire the first 1000 customers?”.

100 people is such a small group. Please trust me: do it in person!

You will learn so much! And know much more about 3 amazingly valuable topics for any founder:

A) YOURSELF
B) YOUR PRODUCT
C) YOUR ACTUAL CLIENTS

As soon as you THINK you have a product ready for clients:

1. Write your story. Express your purpose. Then define your target audience (TA).

2. Tell the story to 100 people. Not all of them need to be potential customers (TA), but most of them should be.

3. Pay attention to the discrepancies between what you thought people would react like, and what they actually reacted like. Be honest and objective towards yourself and your business.

4. Redefine your target audience, after you have learned HOW BIASED you really were.

5. After talking to 1-200 people, periodically updating your approach each time after talking to 20-30 people, you can schedule a call and we can set up communication strategies, to automate and modularize what you have learned.

Let me know how did go!
Best regards, Christopher

Know the circumstances of ideal behaviour.

Many agencies will happily take your money, not one can truly empower you to figure out yourself / your own business. Define your goal from the perspective of the potential buyer. Define the ideal state of mind / state of need that a client needs to be in, to distinguish and choose your advertised products / services in comparison to the ones of competitors.

Defining Purpose & Value.

This is a crucial part of creating self-image of a brand / company. Figuring out what YOU need YOUR potential customer to sequently FEEL, THINK, and then DO, so that your product / service will be available to him/her to get the chance to fulfill his/her desire, in a very specific and short moment.

Reverse engineer the process of fulfilling this need back until the moment of “the spark”, by comparing an ideal state of mind to the current state of mind that is required to let people feel a need to interact with the product / service to be sold.

This process requires a rational honesty and behavioural / emotional foresight.

As soon successful business models are already found and defined, a communications strategist like me could be of help to get a better vision of yourself and assist you in finding the best messages that successfully convey emotionalised content.

Before that point of internal corporate clarity, id advise you talk to a specialist in business development, before investing too much time in communication strategies.

I have helped +100 companies, startUps, events, products in +13 countries to define their message and emotionalise their content.

Let me know if you have any further questions.
Best regards, Christopher