Charity Navigator is the largest and most recognized charity rating platform, evaluating over 200,000 nonprofits primarily in the United States. It scores charities on financial health, accountability, and transparency using a 0–100 point system with star ratings. GuideStar, which merged with Foundation Center to become Candid in 2019, provides detailed profiles and transparency seals rather than numerical scores. CharityWatch assigns letter grades (A+ to F) based on financial efficiency and governance, with a stronger focus on how much of each dollar actually reaches programs versus overhead. For Canadian charities, Charity Intelligence Canada (Ci) is the go-to resource. It rates registered Canadian charities on demonstrated impact, financial transparency, and cost efficiency. Ci publishes a top-rated charities list and flags organizations with governance concerns. The Canada Revenue Agency also maintains a searchable database of all registered charities including their filings, but it doesn't provide ratings or analysis. These rating sites matter for charity websites because trust signals directly impact donation conversion rates. When we build or optimize charity sites at Ottawa SEO Inc., we recommend prominently displaying ratings from these platforms when favorable. A Charity Navigator four-star badge or Ci top-rated designation belongs above the fold near donation CTAs. If a charity hasn't been rated yet, linking to the CRA registration page still builds credibility. Key limitations to understand: these sites focus heavily on financial ratios, which can disadvantage newer charities or those working in expensive intervention areas. A lower overhead percentage isn't always better if it means underpaying staff or cutting impact measurement. Also, smaller local charities often aren't rated at all because these platforms prioritize larger organizations with substantial revenue. For website strategy, the takeaway is simple: if you have a strong rating, make it visible. If you don't, focus on transparency instead. Publish annual reports, break down program spending, and show concrete outcomes. Trust converts better than any design trick.