Although I've helped many SaaS startups, your question is a bit too general to give an educated answer, because it really depends on the type of service you are providing, the niche' you're targeting, the clientele, country, etc. For example, launching a SaaS product for B2B isn't the same as launching for a B2C product. A product for younger consumers wouldn't b launched the same as a product for older ones.
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