
Redefining Legal Services with Transparency and Experience
At Castlegate Law, we combine decades of legal expertise with a commitment to transparent, fixed-fee services tailored for startups, creatives, and growing businesses.
Why We Founded Castlegate
Castlegate Law was born from firsthand experience—decades of it—navigating the challenges of both private practice and executive in-house legal roles. The founding vision was simple: modern businesses deserve legal services that are as clear, agile, and strategic as they are.
Castlegate was built to rethink what legal representation looks like. No hourly billing. No mystique. Just fixed-fee, business-aligned legal counsel that fits the way founders, creatives, and companies actually operate.
That vision started with our founder, Mark S. King, Esq., a seasoned General Counsel and Chief Legal Officer. But it’s now carried forward by a growing legal team committed to transparency, responsiveness, and results.

Mark S. King, Esq.
Founder / Director
Our Mission & Values
- Transparency: Clear communication and upfront pricing.
- Client-Centric Service: Tailored legal solutions that align with your business objectives.
- Integrity: Upholding the highest ethical standards in all our engagements.
Client Success Stories
Discover how growth-stage companies have tapped Castlegate’s fixed-fee business, corporate, IP, and fractional in-house counsel to eliminate billing surprises, safeguard their assets, and accelerate strategic growth.
The subscription plan is a game-changer for my startup. I can access expert legal advice without worrying about unpredictable costs.

Kristin N.
Startup Founder / CEO
Castlegate Law provides exceptional support for my business. Their flat fees make budgeting easy, and their team is always there to guide me on a moment’s notice.

Christian C.
Small Business Owner / Podcaster