I really don't know enough about your product to give you a comprehensive answer, but the best way to raise money is to sell something. Having been through this several times before, here are some of the solutions we've used. In this case, you don't want to sell equity, so you either need to presell your product if it doesn't exist or you need sell your testers or early adopters if it's already available.

If you are offering a product in the B2B space, then it might be a good idea to sell a lifetime license to potential clients for a discount off what they would pay for the regular product, but enough cash to keep you going. It may take multiple to make it work, but it could work.

You can also try to do the same with consumer products and services and offer lifetime or other advantages for a larger upfront commitment.

Although distracting, you could also consider offering services around what you are selling to enhance the revenue stream from the product.

Feel free to reach out to me if you have any questions about how to pull this off.