The Best No-Rules Organizations Ranked: KOTS vs FPVS vs UUF vs Holmgang
The no-rules fighting space has matured beyond simple backyard brawls into a competitive landscape of organized promotions. KOTS, FPVS, UUF, and Holmgang each bring unique approaches to unsanctioned combat. We ranked them across every category that matters to fans and fighters.
For the broader underground landscape, see our top 10 underground fighting organizations.
The Organizations
KOTS (King of the Streets) - The Dutch-based promotion known for its circular pit, cinematic production, and international roster. The standard-bearer for high-production underground fighting.
FPVS (Fair Park Venue Series) - The Texas-based organization that blends underground fighting energy with increasingly professional production. Known for outdoor events and community focus.
UUF (Underground Ultimate Fighting) - The mysterious, invite-only promotion that operates with minimal public information. Known for cross-promotional matchups and undisclosed locations.
Holmgang - The Scandinavian promotion inspired by Viking combat traditions. Known for its Nordic aesthetic, international cards, and growing European fanbase.
Overall Rankings
| Category | 1st | 2nd | 3rd | 4th |
|---|---|---|---|---|
| Production quality | KOTS | Holmgang | FPVS | UUF |
| Fight quality | KOTS | UUF | FPVS | Holmgang |
| Safety standards | Holmgang | KOTS | FPVS | UUF |
| Atmosphere | UUF | KOTS | Holmgang | FPVS |
| Fighter roster depth | KOTS | FPVS | Holmgang | UUF |
| Accessibility | KOTS | FPVS | Holmgang | UUF |
| Social media presence | KOTS | FPVS | Holmgang | UUF |
| Overall | KOTS | FPVS | Holmgang | UUF |
1. KOTS (King of the Streets) - Overall Winner
Strengths: KOTS has set the standard for what underground fighting can look like. Their production rivals professional promotions, with multiple camera angles, professional commentary, and cinematic editing. The circular pit creates unique fight dynamics and iconic visuals. Their roster draws from across Europe and beyond.
Weaknesses: Events are relatively infrequent (4-6 per year). Ticket prices have risen as the brand has grown, potentially pricing out core fans. Some purists feel the production has become too polished for "underground" fighting.
Best event of 2025: KOTS Blood Money in Amsterdam.
YouTube subscribers: 2M+ | Average views per event: 15-25M
2. FPVS (Fair Park Venue Series) - Runner-Up
Strengths: FPVS captures authentic Texas fight culture with outdoor events that feel genuinely grassroots. Their championship structure gives fighters something to work toward, and the promotion has shown consistent improvement in production quality. Community engagement is strong.
Weaknesses: Production still lags behind KOTS. Geographic focus on Texas limits roster diversity. Less international appeal than competitors.
Best event of 2025: FPVS Championship Night in Dallas.
YouTube subscribers: 500K+ | Average views per event: 3-6M
Full guide: Where to Watch FPVS
3. Holmgang - Third Place
Strengths: Holmgang's Viking-inspired branding is unique in the space. Their commitment to fighter safety exceeds most underground organizations, with mandatory medical checks and strict referee intervention standards. The Scandinavian fanbase is passionate and growing. International matchmaking brings diverse styles.
Weaknesses: Still building their roster and brand recognition outside Scandinavia. Event frequency is low (3-4 per year). The Viking theme can feel gimmicky to some fans.
Best event of 2025: Holmgang Denmark in Copenhagen.
YouTube subscribers: 300K+ | Average views per event: 3-5M
Full guide: Where to Watch Holmgang
4. UUF (Underground Ultimate Fighting) - Fourth Place
Strengths: UUF's mystique is unmatched. The invite-only format, undisclosed locations, and minimal social media presence create genuine underground credibility. Fight quality is extremely high because the promotion handpicks experienced fighters from other organizations. The atmosphere at events is reportedly electric.
Weaknesses: Almost impossible for new fans to access. Limited content online means low discoverability. The secretive approach limits growth potential. Safety standards are the least transparent of the four.
Best event of 2025: UUF Invitational (March 2025).
YouTube subscribers: 150K+ | Average views per event: 5-9M (when content is released)
Full guide: Where to Watch UUF
Rules Comparison
Despite being called "no-rules," all four organizations have some form of regulation:
| Rule | KOTS | FPVS | UUF | Holmgang |
|---|---|---|---|---|
| Gloves | No | No | No | No |
| Headbutts | No | No | Varies | No |
| Groin strikes | No | No | No | No |
| Eye gouging | No | No | No | No |
| Referee | Yes | Yes | Yes | Yes |
| Rounds | 3 | 3-5 | Varies | 3 |
| Weight classes | Approximate | Yes | Approximate | Yes |
| Ground fighting | Limited | Varies | Varies | No |
Fighter Pay Comparison
| Tier | KOTS | FPVS | UUF | Holmgang |
|---|---|---|---|---|
| Undercard | $500-$2,000 | $200-$1,000 | $500-$2,000 | $500-$1,500 |
| Main card | $2,000-$10,000 | $1,000-$5,000 | $2,000-$8,000 | $1,500-$5,000 |
| Main event | $5,000-$25,000 | $3,000-$10,000 | $5,000-$15,000 | $3,000-$10,000 |
KOTS leads in fighter compensation, reflecting their higher revenue and bigger audience.
Which One Should You Watch?
- If you want the best overall product: KOTS
- If you want authentic grassroots energy: FPVS
- If you want unique branding and decent safety: Holmgang
- If you want genuine underground mystique: UUF
- If you want all of them: Follow our underground fighting monthly schedule
Related Reading
- Most Dangerous Fighting Organizations
- Best Underground Fighting Events of 2025
- How Underground Fighting Organizations Make Money
Watch and Learn More
YouTube Channels
- KOTS Official -- The original no-rules fighting organization
- Strelka / TRON MMA -- The world's biggest fight club with 2.45M subscribers
Recommended Fights
- KOTS: Simon Henriksen vs Ronin -- KOTS's greatest fighter in action
- Strelka: Petrantsov Knockout -- The viral truck driver one-punch KO
Official Sites
- KOTS Official Site -- Event info and fighter profiles
External Coverage
- Sports Politika: Inside Sweden's Notorious Underground Fight Club -- Investigative piece on KOTS
Read More on UNSANCTIONED FIGHTS
- King of the Streets Organization Profile -- Full KOTS breakdown
- FPVS Organization Profile -- France's no-rules concrete fighting movement
- UUF Denmark Organization Profile -- Danish warehouse fighting
- Holmgang Organization Profile -- Medieval weapons fighting in modern Europe
- Top 10 KOTS Fighters of All Time -- The greatest no-rules fighters ranked
- KOTS vs Streetbeefs -- Opposite ends of underground fighting
- KOTS vs Top Dog FC -- Europe's two underground fight empires
- Who Runs KOTS? The Hype Crew Story -- The anonymous collective behind KOTS