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, frontier AI model improvements began to outpace the ability of traditional tax service providers to adapt and adopt. Weekly breakthroughs among competing models started producing tax compliance results increasingly more accurate than the best CPAs at faster rates than leading CPA firms, while costing considerably less than the most efficient offshore labor.

Implementing AI tools into a traditional public accounting firm structure, using the traditional bureaucratic playbook, was no longer adequate. To persist, professionals needed to better extrapolate where the technology was headed and how quickly it would arrive. As organizations tried to fold minor improvements into their existing hierarchies, they added more costs and inefficiencies, and it became obvious that clients and the general public were paying the price.

Sleipnir was created with a commitment to regularly solve for this problem.

We believe the rate of change will continue to increase exponentially as super intelligence matures, and only lean organizations will achieve parity. New processes, methods, and strategies must constantly be evaluated and implemented at the speed of electrons. 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 a 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