There are many factors to consider when evaluating the best, cost-effective cloud solutions for an organization. Some key considerations include:

Business needs: It's important to select cloud solutions that meet the specific needs of the organization, including its size, industry, and workload requirements.

Cost: Different cloud solutions have different pricing models, and it's important to select a solution that fits within the organization's budget. This may involve comparing the costs of different cloud providers and evaluating the long-term costs of different deployment models (e.g., pay-as-you-go vs. reserved instances).

Security and compliance: It's essential to choose cloud solutions that provide the necessary security and compliance controls to protect the organization's data and systems. This may involve evaluating the security measures and certifications of different cloud providers.

Ease of use and integration: It's important to choose cloud solutions that are easy to use and integrate with the organization's existing systems and processes.

Overall, the best, cost-effective cloud solutions will vary depending on the specific needs and goals of the organization. It's important to carefully evaluate the various options and choose the solutions that best meet the organization's needs and budget.