When choosing an ESP API, consider the following factors:
Ease of Integration: Ensure the API is well-documented and easy to integrate with your existing systems. Scalability: The API should be able to handle your current and future email volume without performance issues. Feature Set: Evaluate the features offered by the API to ensure they meet your business needs. Cost: Consider the pricing model and ensure it fits within your budget. Support: Good customer support is crucial for resolving issues quickly and efficiently.