Here are some well-known home decoration companies in Istanbul that offer a range of services, from interior design to furniture and décor:

1. Tepe Home: A leading Turkish brand that offers a wide range of furniture and home decoration products. They provide both modern and classic design options, along with interior design consultation services.
2. Mudo Concept: A well-established home décor brand in Turkey, Mudo Concept offers stylish furniture, accessories, and home decorations that cater to various tastes, from contemporary to rustic designs.
3. IKEA Istanbul: Known for its affordable and stylish furniture, IKEA offers a variety of home decoration options, including furniture, lighting, and accessories, along with design planning services.
4. House of Superstep: Specializes in high-end furniture and décor items, offering bespoke design services for clients who want a more customized home decoration experience.
5. Vitra: This Turkish brand focuses on contemporary design and is known for its bathroom and kitchen products but also offers a wide range of furniture and accessories for home décor.
6. Enza Home: A large furniture and home decoration chain in Istanbul that provides a range of furniture, textiles, and accessories for different tastes and budgets.

These companies offer different styles and services, from modern minimalist designs to more traditional, luxurious interiors, providing plenty of choices for your home decoration project in Istanbul.