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School comparison · Nairobi
Side-by-side comparison · Updated 2026-04-26 · Both schools in Nairobi
Quick answer
Both schools offer IB.
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Build family shortlist (free) →| Metric | International School of Kenya | St. Mary's School Nairobi |
|---|---|---|
| Curriculum | IB, American | IB, British |
| Qualifications | — | IGCSE and IB Diploma |
| Ages served |
|---|
| Ages 4 to 18 |
| Ages 6 to 18 |
| Language of instruction | English | English |
|---|
| True annual cost? | $25,486 | — |
|---|
| Hidden fee %? | +3% | — |
|---|
| First-year cost? | $26,986 | — |
|---|
| WhereNext Value Score? | 67/100 | — |
|---|
| Cost percentile (city)? | 100th | — |
|---|
| Students | 1,070 | — |
|---|
| Nationalities | 65 | — |
|---|
| Avg class size | 20 | — |
|---|
| Admissions | Moderate | Open |
|---|
| Accreditations | IBO | IBO, CIE |
|---|
Highlighted cells indicate which school holds the more favourable value for arriving expat families on that dimension (e.g. lower tuition, smaller class size, higher Value Score, more open admissions). Some rows are neutral.
Full profile · International School of Kenya
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Full profile · St. Mary's School Nairobi
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True annual cost in Nairobi
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The School Fit Brief weights every dimension above against your family's specific needs — budget, learning support, curriculum preference, age band, family priorities — and produces a definitive recommendation with a 30-day action plan. $49 one-time.