International Biology Olympiad (IBO) vs Regeneron ISEF Awards

Comparing two elite STEM opportunities. International Biology Olympiad (IBO) is a olympiad while Regeneron ISEF Awards is a competition.

International Biology Olympiad (IBO) Regeneron ISEF Awards
Prestige Tier Tier 1 — Elite Tier 2 — Highly Competitive
Type Olympiad Competition
Organization International Biology Olympiad Society for Science
Acceptance Rate Highly competitive; typically only 4 students per country compete at international level. Exact global acceptance rate unknown but extremely selective Approximately 1,600-1,700 finalists compete at ISEF annually out of significantly larger pool competing at 365+ affiliated fairs; roughly 600 finalists receive awards/prizes (37.5% of finalists awarded)
Applicants Varies significantly by country; some countries have dozens to hundreds of participants in national preliminaries Over 1,600 finalists selected annually from 365 Society-affiliated fairs across 60+ countries and territories; total number competing at all affiliated fairs globally is much larger (tens of thousands)
Deadline
Award $7,000,000
Cost to Apply Free Free
US Only No / International No / International
Grades High school students (typically ages 14-20, exact age limits vary by country) 9th through 12th grade (high school students)
College Impact Extremely positive. Participation in the International Biology Olympiad—especially reaching the international finals—is one of the most prestigious achievements in high school STEM. College admissions... Reaching Regeneron ISEF as a finalist is extremely prestigious in college admissions and carries significant weight. Top colleges (Ivy League, Stanford, MIT, etc.) view ISEF participation highly favor...