IRON vs Castoldi: comparison 2026
We pit IRON Boats against Castoldi with the usual script: what each builds, with which materials, in which price range and which boater each makes sense for.
IRON 
Castoldi Comparison table
| IRON | Castoldi | |
|---|---|---|
| Country | Sweden | Italy |
| Founded | 2019 | 1962 |
| Specialty | Sporty day boats with a patented rigid perimeter fender (RIB looks without the air) | Jet tenders (Jet Tender line) with in-house waterjet drives |
| Hull materials | Fibreglass | Fibreglass |
| Tubes | Patented rigid fender with air chamber (not a classic tube) | Hypalon (CSM) |
| Size range | 5 – 8.5 m | 4.3 – 8.6 m |
| Price level | €€€€ — High — Scandinavian premium | €€€€€ — Premium |
| Ideal for | Those who want RIB looks and practicality in a sporty day boat without inflatable tubes | Yachts and superyachts wanting a robust jet tender with industrial pedigree |
IRON, in short
IRON Boats was born in 2019 in Billdal (Sweden) from the Peterson brothers and the Mannerfelt design studio. Its original proposition: replace the RIB's inflatable tube with a patented rigid perimeter fender with an air chamber, inspired by modern naval vessels. The result is a sporty day boat with RIB practicality but none of the tube maintenance. Nearly 1,000 units built already back it up.
Strengths
- Patented rigid perimeter fender: RIB toughness without punctures or tube maintenance
- Design by Mannerfelt studio, a benchmark in fast, efficient hulls
- Scandinavian finish and ergonomics
- Very fuel-efficient hulls
Things to consider
- Young brand (2019), service network still expanding
- Not a 'real' RIB: the fender doesn't provide the buoyancy of an inflatable tube
- Premium price
Castoldi, in short
Castoldi is a historic Italian manufacturer (Abbiategrasso, since 1962) famous for building its own waterjet drives. Its Jet Tenders are the industrial, robust alternative to Williams: highly valued on superyachts and also in professional and military versions. Maximum hull-drive integration and built to last decades.
Strengths
- Has built its own waterjet drives since the 1960s: total integration
- Robust construction also aimed at professional and military use
- No propeller: safe in swim areas with minimal draft
- Established prestige in the superyacht market
Things to consider
- Premium price
- Specialist jet maintenance
- Range starts at 4.3 m: no compact option
Our verdict
Choose IRON if you fit its profile: those who want rib looks and practicality in a sporty day boat without inflatable tubes. Choose Castoldi if the opposite applies: yachts and superyachts wanting a robust jet tender with industrial pedigree. And if budget rules, IRON starts with a price advantage — though it always pays to compare specific models at equivalent specification.
Our practical tip: before deciding between these two, also get a price for an equivalent Navisoul model. With Hypalon available across the range and yard customisation, it often wins the comparison without the brand premium.
Frequently asked questions
Which is better, IRON or Castoldi?
There's no single answer: it depends on use. IRON stands out for patented rigid perimeter fender: rib toughness without punctures or tube maintenance, while Castoldi stands out for has built its own waterjet drives since the 1960s: total integration. On price, IRON is usually the more accessible of the two.
Which is cheaper, IRON or Castoldi?
In general IRON sits at a lower price level (high — scandinavian premium) than Castoldi (premium). The final price always depends on the specific model and configuration.
Are there alternatives to IRON and Castoldi?
Yes. At dinguis.com we sell the Navisoul range (Caral Marine) and advise on any boat and brand on the market, as well as analysing them in our comparisons.
We help you decide
Tell us your boat, where you'll stow the tender and your budget, and we'll tell you which specific IRON, Castoldi or Navisoul model fits best — with numbers, not fluff.
- A comparison tailored to your case
- Reply within 24 working hours
- No obligation
IRON, Castoldi or another? We can help
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