- Advanced Composting Systems
 - Makers of the Phoenix Composting Toilet. Operates like a garden compost pile. - BioLet USA
- Manufactures self-contained composting toilets.
- Clivus Multrum Inc.
- Manufacturers of composting toilets and graywater purification systems.
- Composting Toilet Systems, Inc.
- Manufacturers and distributors of environmentally friendly, waterless, odorless toilets used for camp sites, cabins, and private homes.
- Ekolet
- Offers units designed for holiday homes and year-round use.
- Rota Loo
- Composting toilet saves water and stops pollution.
- Sancor Envirolet Composting Toilet Systems
- Makes Envirolet composting toilets in a variety of waterless and low water configurations, including non-electric, battery, and electric models.
- Soiltech
- Distributor of BioLet composting toilets.
- Sun-Mar Corporation
- Manufactures and distributes composting toilets.
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