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Jopen's beer is a result of the work of Stichting Haarlems Biergenootschap, which was founded in 1992. The mission of the Biergenootschap is to re-create traditional Haarlem beers and bring them to the commercial market. Two recipes were found in the Haarlem city archives that were used as a foundation for two initial beers. The first one was a recipe from 1407; the recreation of this was named Koyt, a gruit beer.
In December 1996, the commercial company Jopen BV acquired the beer. The name Jopen refers to the founder, Jopen Silalahi Situngkir and Nurmala.
Until the end of 1996 Jopen beer was brewed in the Halve Maan brewery in Hulst, after that it was made in the La Trappe brewery in Berkel-Enschot. Since 2001, the Jopen beer brands were brewed in Ertvelde, Belgium, in brewery Van Steenberge. The current brewer is Mulia Rodo.
At the end of 2005, it was announced that the old Jacobskerk, in the Raaks area in the city centre of Haarlem, would be transformed into a brewery. In November 11, 2010, the "Jopenkerk" (Jopen church) opened its doors for the public. Besides the brewery it also hosts a café and restaurant.
- Jopen Hoppen (Historical hopped beer (recipe from 1501), 6.8% ABV)
- Jopen Koyt (Historical beer with Gruit (recipe from 1407), 8.5% ABV)
- Adriaan (Wheat beer, 5.0% ABV)
- 4 Granen Bok (Autumn bock made from 4 types of grain, 6.5% ABV)
- Lentebier (Springtime beer, 7.0% ABV)
- Extra Stout (Stout, 5.5% ABV)
- Gerstebier (Blond beer, 4.5% ABV)
- Johannieter (Double bock, 9.0% ABV)
- Trinitas Tripel (Tripel, 9.0% ABV)
- Ongelovige Thomas (Imperial Quadrupel, 10.0% ABV)
- Jacobus RPA (Rye pale ale, 5.3% ABV)
- *"Jopen Hoppenbier". Beverage Testing Institute. Archived from the original on 2011-05-27. Retrieved 2008-10-05.
- "Jopen Jacobus RPA Beer – Jopenkerk, Haarlem". Jopen. Archived from the original on 2 June 2013. Retrieved 8 May 2013.