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Catalyst

Catalyst

Roaster · 1 shop in London

2017Founded
+811 origins
11Coffees

Holborn roastery-bar, basement Diedrich visible through the glass floor.

WebsiteInstagram

About

The 12kg Diedrich began roasting soon after Alex Gkikas soft-launched in late 2016 and opened officially in January 2017, on the corner of Grays Inn Road and Baldwin's Gardens. He served Swedish roaster Koppi's beans before then. They serve single origins only, usually four rotating Ethiopian coffees, with direct trade lots from Finca La Lomita in Colombia and Taiwanese Geisha producers.

Glass panels in the floor at the front look down on the roaster in the basement. The shop above is a single square room under a dark green ceiling, glazed full height on both street sides, with benches out on the corner pavement.

Roasting

Roasts in-house · Sourced from Brazil, China, Colombia, Costa Rica, El Salvador, Ethiopia, Mexico, Nicaragua, Peru and Uganda

Equipment

DrippersV60
RoastersDiedrich 12kg

Beans

Own Shops

HolbornCatalyst4.7(769)·Open · Closes 17:00

In the News

Time Out · 19 Jan

11 London Coffee Shops Named Best in the UK for 2026Twelve London shops named among UK's 44 best for 2026.

Details

TypeIndependent
Founded2017
FounderAlex Gkikas
Websitecatalyst.coffee
Instagram@catalyst__cafe