Sleipnir

Intelligent tax compliance.

Partner-reviewed. Frontier AI enabled. Data privacy guaranteed.

Services

  • Fund tax compliance — investment funds, general partners, management companies and fund executives
  • Business and business owner tax compliance — C Corp, S Corp, Partnership, business owners and HNW individuals
  • Super Intelligence implementation
  • Architecture and data security advisement

About

In the summer of 2026, a problem emerged in the tax compliance business. Frontier AI model improvements had begun to outpace the ability of traditional tax service providers to adapt and adopt. Weekly breakthroughs among competing models began to produce tax compliance results more accurate than the best CPAs at faster rates than the leading CPA firms, and at considerably cheaper costs than any offshore labor could afford.

Although many organizations tried their best to implement “AI tools” to keep up, the traditional bureaucratic playbook of technology adoption was no longer adequate. Many failed to deeply understand and extrapolate where the technology was headed and how quickly it would arrive. As organizations tried to fold minor improvements into their existing organizational hierarchy, adding more costs and inefficiencies instead of less, it became obvious to me that clients and the general public were paying the price as a result.

Sleipnir was created with the commitment to constantly solve this problem. We believe the rate of change will continue to increase exponentially as super intelligence matures, and only lean organizations will achieve parity. Sleipnir exists because businesses and taxpayers deserve to capitalize on the benefits of tomorrow’s technology without paying yesterday’s legacy costs, in both time and currency. Our mission is to make those efficiencies reality for businesses across America.

Brendan Ryan, CPA

Brendan Ryan, CPA, MST

Managing Partner

Previously Senior Manager, Financial Services, at RSM US LLP (2016–2026), specializing in hedge fund, private equity, and fund-of-funds taxation. Currently a tax subject-matter expert for AI training at SpaceX Super Intelligence (2026–present).

CPA licensed in New York and North Carolina. MS in Taxation, Baruch College.

Contact

[email protected]

Wilmington, NC