Proteus - the Brazilian half

It appears here as half of a merger rather than in its own right, and that is the honest shape of what is reachable: the coverage of the transaction is extensive and the coverage of the company before it is thin. A firm can be substantial enough to anchor a two-hundred-and-fifty-million-dollar consolidation strategy and still leave most of its own history unwritten.

The pairing is the point in any case. A Chilean company and a Brazilian one were bought to be combined, which means the buyer was reading the region as a single market before either company was.

Its origin is documented and its founding year is not, which is an unusual combination worth stating plainly. Exame traced the company to 1995, when Joao Mendes Carvalho and Marcelo Weyne Romcy, computer science students at the Universidade Federal do Ceara, built a CD that walked a user through getting online and sold it to a hundred internet providers around the country. They then spent six months studying network security before building the assessment tool the business was made of, took the company from Ceara to Sao Paulo, and later opened in the United States. Whether 1995 is the founding of the company or the beginning of the partnership that produced it, the sources do not say.

The full registered name was Proteus Risk Management. Patria Investimentos built the vehicle that bought it in October 2021, originally called CBS CyberSecurity Holding, and acquired the Chilean firm NeoSecure in the same move - two companies purchased to be combined rather than run separately.

The combination was launched as SEK - Security Ecosystem Knowledge - on 30 March 2023, after roughly 100 million dollars spent on integrating the two, against a stated commitment of 250 million to the sector. It opened with 650 clients, 100 million dollars of 2022 revenue and around 750 people, with Patria holding 80 per cent. SEK went on to buy CleanCloud in 2023 and Proof in 2024.

What happened to the Proteus name is the ordinary fate of a company bought to be merged: it survived about eighteen months as a brand and then became part of someone else's. The engineering and the client base carried on; the name did not.