Here is the pricing information for KnowledgeOwl in a paragraph format, as it does not fit neatly into a simple table due to the various additional costs and discounts:

KnowledgeOwl offers three main plans: Flex, Business, and Enterprise. The Flex plan costs $79/month, or $853/year with a 10% discount, and $711/year for nonprofits with a 25% discount. The Business plan is $299/month, or $3,229/year with a 10% discount, and $2,691/year for nonprofits with a 25% discount. The Enterprise plan is $999/month or $11,000/year.

Each plan includes one knowledge base and one author, with additional knowledge bases costing $50/month and additional authors costing $25/month for the pricing plan described on the KnowledgeOwl website. However, the detailed breakdown from the other source indicates that for the Flex, Business, and Enterprise plans, additional authors cost $20/month.

All plans include unlimited readers and various features such as API access, article management, and user access management. The Business and Enterprise plans offer additional features like priority support, SSL certification upload, and higher SLA uptime. The Enterprise plan also includes customizations, vendor assessment forms, and personalized account management.

Discounts are available for yearly, two-year, and three-year payments, with savings of 10%, 15%, and 20% respectively. Nonprofits and B Corporations can also receive a 25% discount.