Probably
Philippe Andouard known for its atypical and very nervy high end finished bikes,
Cycles Pierre Perrin which is known to craft high end light steel frames. A race bike by Philippe Andouard For Perrin, steel is the most suitable material for building a bicycle, as it filters out vibrations and its rigidity ensures high performance, while also offering a wide range of finishing options. 7.6 kilos is the weight of a steel bike at Pierre Perrin.
Cycles Le Vacon which I consider the equivalent of Passoni regarding titanium welding. Jean-Pierre Le Vacon is renowned for his titanium frames, a material that does not oxidize. He also manufactures and assembles frames in aluminum, steel, stainless steel and carbon. Le Vacon titanium welds frame finish
Cyfac (Cycles Fabrication Atisanale de Cadres) was and is a household name if you are researching a high end top notch made frame.
Based in the Touraine region of France, Cyfac represents a major name in the French cycle industry, and a certain idea of craftsmanship combined with state-of-the-art technology. Cyfac manufactures custom road, track and touring frames in steel, aluminum, titanium and carbon, as well as titanium/carbon (laminated carbon joints, titanium tubes). In its young history, Cyfac was a pioneering company, the first manufacturer to TIG-weld aluminum frames, a synonym for the weight savings sought by Chiapucci, Pantani and others. Cyfac represents a technologically advanced craft of precision and quality, demonstrating that an SME can compete with global manufacturers. Today, Cyfac continues to offer handcrafted, made-to-measure frames for the general public and professionals alike. Cyfac's high standards are also reflected in the Cyfac postural system, the method used to measure the rider's posture and frame geometry, which is now developed and marketed by Morphologics.
And at last but not least
Cycles Pilorget has also been a specialist in custom bicycles for 35 years.
When I was roadbike racing from 1996 to 1999 one of my club leaders had a pilorget sandvik titanium custom made road bike of the same level of quality and finish than a Passoni and the other one had a Cyfac made of combus ultrafoco roadbike than was better finished than a Colnago Master or a Colnago Oval Titan.