| Business | Service | contact |
| Aegean Cruises | Cruises with wooden sailing boat | info@aegeancruises.gr (+0030)6947267877 |
| A la mer | Private Cruises and Transportation | info@alamer.gr (+0030) 6944 653744, (+0030) 22840 32002 |
| Amanda | Cruises with wooden sailing boat | sifnoscruises@gmail.com (+0030 ) 6971 971729 |
| Bloomarine | Private Cruises and Transportation | info@bloomarine.gr (+0030) 6984 857273, (+0030) 6942 945472 |
| Calypso Boat Rental | Private Tours, Transportation and Boat Rental | info@sifnosboatrental.com (+0030)6982 558733, (+0030)6970 424004 |
| Rib | Private Tours and Transportation | aegean@thesaurus.gr (+0030) 22840 33152 |
| Sifnos Island Cruises | Morning and afternoon cruise with Princess Sofia | sifnosislandcruises@gmail.com (+0030) 6979 971733 |
| Sifnos Sailing | Cruises and day trips with the wooden sailing boat «Armonia» | sifnossailing@gmail.com (+0030)2284071523, (+0030)6972099318 |
| Instayacht Services | Private tours and transfers | instayachtservices@gmail.com (+0030)6988298673, (+0030)6986941451 |
Melia Sifnos Houses 