Tanzania vs Kenya Coffee:
A Roaster's Comparison

Two Great East African Origins, Different in Every Detail

Tanzania and Kenya sit side by side on the map and share a broadly similar growing climate — high altitude, volcanic soil, equatorial sun moderated by elevation. But spend an afternoon cupping both origins side by side and the differences are immediately apparent. Understanding what separates them helps roasters make better sourcing decisions and communicate more clearly with customers.

Cup Profile Comparison

Kenya's SL28 and SL34 varietals — developed in the 1930s by Scott Laboratories — produce a distinctively bold, winey acidity that has become the reference point for what many specialty buyers mean by "East African coffee." Tanzania, growing more Bourbon, NY11, and local Typica derivatives, tends toward a cleaner, more delicate cup with less dramatic but arguably more versatile acidity.

Grading Systems

Both countries use screen-size grading, but with different labels. Kenya AA is screen 18+ (same as Tanzania AA), but Kenya additionally grades AB (17–18 combined), C, PB (peaberry), and E (elephant bean/broken). The Kenyan grading system is more standardised and consistently applied through the Nairobi auction, while Tanzania's system has more variability in how grades are applied at the cooperative level.

One important point: neither country's AA grade is a quality guarantee. As with Tanzania, Kenya AA describes bean size — not cup score. A Kenya AA at 82 SCA is not the same as a Kenya AA at 88 SCA, despite sharing the same grade designation. Always evaluate by cupping score.

Pricing

Kenya consistently commands higher prices than Tanzania in the specialty market — sometimes significantly so for top lots. This reflects Kenya's established reputation, the demand for SL28 and SL34 varietals specifically, and the efficiency of Kenya's auction system which creates competitive price discovery. Kenya AA from a well-known cooperative routinely trades at $5–9/kg green; equivalent Tanzania AA typically trades at $4–7/kg.

From a roaster's commercial perspective, Tanzania often represents better value for money — comparable or higher cup scores at lower cost, with the added advantage of a less crowded narrative (Tanzania is underrated relative to its quality, which gives roasters more room to build a distinctive story around it).

Consistency and Supply

Kenya has a more developed specialty export infrastructure and a more consistent supply of high-scoring lots season to season. Tanzania's quality is equally capable at its best, but more variable — partly because cooperative infrastructure is less uniform across the country's diverse growing regions.

For roasters building a reliable signature Tanzania offering, the solution is to work with suppliers who do the traceability and quality verification work at origin — identifying the specific washing stations and cooperative lots that consistently score above your threshold, rather than buying Tanzania as a generic origin.

Which Should You Stock?

The honest answer is: both, if your volume supports it. They serve different customer conversations. Kenya is the more immediately impressive cup — bolder, more dramatic, likely to win over customers at first taste. Tanzania is the more versatile and nuanced origin — excellent for customers who appreciate subtlety, and for roasters building a thoughtful East Africa programme rather than chasing maximum acidity intensity.

If you can only stock one, and your customer base skews toward filter and pour-over with a preference for floral and stone fruit notes over bold berry and winey acidity, Tanzania is the stronger choice. If your customers love big, bold East African cups and you can justify the price premium, Kenya deserves its reputation.