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Singapore Sleek provides digital company incorporation, accounting, tax filing, and corporate secretarial services in Singapore, Hong Kong, Australia, and the UK.
FlagTheory
Locations
Singapore
Employees
11-50
Year founded
2012
About
FlagTheory provides advisory services on international structuring, tax residency, citizenship-by-investment, and asset protection. The firm helps entrepreneurs and globally mobile individuals optimize tax exposure and regulatory risk across jurisdictions. Its services include residency planning, entity formation, and strategic global mobility.
Entity Setup and Business Incorporation 40%
Accounting and Bookkeeping 30%
Legal and Compliance Services 30%
Technology/IT 40%
Professional Services 30%
Financial Services 30%
Case studies
FlagTheory
Case Study: Investment in Farmland - New Zealand Residency
An investor wanted to deploy 10 million NZD into New Zealand for his family and start a farm while obtaining New Zealand residency. The investor successfully obtained New Zealand residency for hims...
Agriculture/Investment
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FlagTheory
Case Study: South African Software Shop in Thailand - BOI Company Structure
A South African entrepreneur running a software development business faced multiple challenges operating in Thailand. The South African entrepreneur successfully established a legitimate, tax-optim...
Software Development/Technology
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FlagTheory
Case Study: Australian Entrepreneur Achieves 10% Tax Rate in Philippines
An Australian entrepreneur wanted to relocate to the Philippines to take advantage of the country's excellent human resources (college-educated, English-speaking workforce) and business opportuniti...
Business Process Outsourcing/Technology
+1
+1
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Bobur
Nov 21, 2025
“I am very thankful for Mr.s Gulsah Erol is very helpful for our paper work”
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Nikola Trajkov
Aug 21, 2025
“We at PlaySmart have worked with Flag Theory for over 4 years, and it's been an outstanding experience.”
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ori yakuel
Jul 28, 2025
“I turned to Flag Theory to eliminate regulatory uncertainty and build a dependable cross-border tax structure.”
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Anonymous
Apr 1, 2026
“Professional, efficient, and highly knowledgeable team. They provided clear advice and helped resolve our issue quickly.”
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Anonymous
Apr 1, 2026
“Their services are consistently professional, reliable, and of the highest quality. Ms.Lengeline is always available, pleasant and helpful.”
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Anonymous
Apr 1, 2026
“Worked with them for the last 7 years. Prices are more than fair, response times are incredible.”
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Anonymous
Apr 1, 2026
“Been using them 6 years, only good things to say about them. Always responsive and competent.”
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Anonymous
Apr 1, 2026
“I recently used Flag Theory for my company incorporation, and I couldn't be more satisfied with the experience.”
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Anonymous
Apr 1, 2026
“Very responsive and supportive firm, quick turnaround, and reasonable fees.”
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Anonymous
Sep 18, 2026
“I have been utilizing FlagTheory.com since 2019 and consistently recommend their services to all my clients.”
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Anonymous
Sep 18, 2026
“Flag theory have provided services of exceptional quality. Their assistance in registering a company was incredibly smooth and fast.”
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Anonymous
Sep 18, 2026
“I use Flag Theory for many companies and I am very happy with their services.”
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Anonymous
Sep 18, 2026
“Based on this experience, I can confidently say that Flag Theory offers one of the best services in the market.”
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Anonymous
Dec 3, 2023
“After 2650$ paid (+ 450€ of bank charges), 6 months of procedure and 3 weeks without news from their team.”
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Anonymous
2021-2022
“Flag Theory is fast, efficient, well priced, and one of the most impressive firms I have worked with.”
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Anonymous
2021-2022
“I have been working with this Company almost one year, they always provide services to me with high responsibility and sincerity.”
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Anonymous
2021-2022
“Flagtheory knows their stuff and gives real and current advice.”
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Anonymous
2021-2022
“The consultants are extremely unhelpful, promise to assist but shift the blame on to the client. I highly recommend never using flag theory.”
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Anonymous
2021-2022
“With flagtheory, I was able to open an offshore company AND a bank account with a reputable Swiss Private Bank.”
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Anonymous
2021-2022
“The prices are very fair and they accept crypto :) I wish I would have used this service in the first place.”
