LAST UPDATED: August 1, 2026

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Siris Capital Group, LLC

601 Lexington Avenue- 59th Floor | New York- New York- 10022 | 212-231-0095

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Revenue: $1 million - $5 million | Year Founded: 2011 | Firm Size: 10 - 50

Core Services: Portfolio Sales , Credit Card Processing , PCI Compliance

Sirius, Bps Enterprise Agency

8 St Augustines GAte | Hedon- East Riding Of Yorkshire- HU12 8EX

View Reviews (1) | Write a Review

Revenue: Est. $1 million | Year Founded: 2013 | Firm Size: 1 - 10

Core Services: Small Business Loans

Siriusware, Inc.

302 Camino De La Placita | Taos- New Mexico- 87571 | 800-351-0633

View Reviews (1) | Write a Review

Revenue: $5 million - $10 million | Year Founded: 2016 | Firm Size: 10 - 50

Core Services: Point of Sale Systems

Sirq Merchant Solutions, L.C.

United States

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Revenue: Unknown | Year Founded: - | Firm Size: -

Core Services: Credit Card Processing

SIS POS Sdn Bhd

48-1 GF- Jalan PJU 1/3B- SunwayMas Commercial Centre- | Petaling Jaya- Selangor

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Revenue: $3 million - $5 million | Year Founded: 2016 | Firm Size: 15+

Core Services: Point of Sale Systems

SISA Information Security

440- North Wolfe Road- #85- | Sunnyvale- California- 94085 | 1 408-412-5476

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Revenue: $10 million - $50 million | Year Founded: - | Firm Size: 100 - 250

Core Services:

sisgain.com

C/109 | Noida- Uttar Pradesh- 2.00E+5 | (647) 336-0444

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Revenue: Est. $1 million | Year Founded: - | Firm Size: 1 - 10

Core Services:

SITA

2 Olympiades Avenue | Brussels- Brussels- 1140 | 32 27450510

View Reviews (4) | Write a Review

Revenue: $500 million - $1 billion | Year Founded: 2010 | Firm Size: 2,500 - 5,000

Core Services: PCI Compliance

SITEL Worldwide Corporation

600 Brickell Avenue- Suite 3200 | Miami- Florida- 33131 | 1 (615) 301-7100

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Revenue: $1+ billion | Year Founded: 2002 | Firm Size: 25,000+

Core Services: PCI Compliance

SIU Credit Union

395 North Giant City Road | Carbondale- Illinois- 62902 | 800-449-7301

View Reviews (16) | Write a Review

Revenue: $10 million - $50 million | Year Founded: 2015 | Firm Size: 100 - 250

Core Services: Credit Card Processing

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