1. Customer Need: Evergreen is designed for customers who prefer a continuous subscription model with regular updates, while Timely is focused on customers who prefer a one-time purchase with periodic major upgrades.
2. Development Approach: Evergreen follows an iterative development approach, releasing updates frequently and continuously improving the product, whereas Timely adopts a more traditional development approach with distinct versions released at specific intervals.
3. Cost Structure: Evergreen typically has a subscription-based pricing model, where customers pay a regular fee for access to updates and support, while Timely usually charges a one-time upfront cost for the purchase of a specific version with limited free updates.
4. Flexibility: Evergreen offers greater flexibility for users to adapt to changes in the software environment through continuous updates, while Timely provides stability and predictability with well-spaced major updates that users can plan for.
5. User Engagement: Evergreen fosters ongoing user engagement through a steady stream of new features and improvements, encouraging users to stay up to date with the latest offerings, whereas Timely may require a more proactive approach from users to upgrade to newer versions and take advantage of new functionalities.
6. Support and Maintenance: Evergreen requires ongoing support and maintenance services to ensure seamless updates and customer satisfaction, while Timely may have a more foreseeable support and maintenance schedule tied to major version releases.

In Summary, Evergreen and Timely differ in their customer need focus, development approach, cost structure, flexibility, user engagement, and support and maintenance requirements.