Exalead is the company that produced Exabot and it was founded by François Bourdoncle, a pioneer of the search engine software market, which is also the president and chief executive officer of Exalead. In 2000, he co-founded Exalead with the goal of revolutionizing the search engine software market by providing users with a unified technology platform to access information in the enterprise.

Exalead has many products based on their search engine technology (like exalead:desktop, exalead:workgroup, exalead:enterprise, exalead:datacenter), among them is also exalead: search.

As it states on the company webpage, the exalead: search solution is their main product:

"exalead one: search is not just a concept. This unique technology is used every day by hundreds of thousands of users - from students to homemakers, entrepreneurs to corporate titans - around the globe. It serves as the platform for all of Exalead's solutions."

In february 06, 2006 the company announced that the search engine reached 4 billion web pages indexed.

Here is a technical overview about the exalead one:search

• written in ExaScript, a Java-based configuration language
• uses advanced algorithms and is optimized for 64-bit processor architectures
• simultaneously indexes and processes data (structured and unstructured) as well as search queries in real-time
• returns more relevant results. The technology also eliminates the need for human intervention or the use of dictionaries.
• dictionaries (word, word-stemming, noun groups, and thesauri) are fully automatic, incremental, and real-time.
• inherently multilingual. Language recognition is processed when “crawling” a document.
• Boolean search (AND,OR,NOT operators)
• Phrase search (OR operator)
• Proximity search (NEAR operator)
• Optional search terms (OPT operator)
• Site collapsing
• Similarity collapsing
• Ranking customization
• Proximity ranking
• Supported Formats

You can read the whole technical specifications on Exalead's site.