Four differences that actually decide it.
Everyone in this category does natural-language search and none of them train on your data. Here is what genuinely differs — pick a competitor and the table narrows to just you and them.
Everyone else charges per seat, so growing the team grows the bill and someone decides who is left out. At 250 people that is €1,500 against $6,250–15,000.
Of the five tools here, AiSU is the only one that links each claim to the passage it came from, read live from your document rather than an index copy.
Content is fetched to answer and discarded. EU headquarters and EU processing by default.
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Compiled from published rates and documentation, July 2026: ChatGPT Enterprise ~$60 per seat, Microsoft 365 Copilot $21–30 per seat, Glean ~$50 per seat with a $50K annual minimum, Guru $25 per seat. AiSU Strata prices are flat-rate per organisation in EUR, excluding VAT. Where a vendor's support is limited or conditional we mark it partial rather than claiming it is absent — tell us if anything here is out of date and we will correct it.
One at a time
Go deeper on one.
A focused, side-by-side breakdown for each of the four — where we win, and where they do.
Microsoft 365 Copilot searches Microsoft only. AiSU searches across all your platforms — with cited answers.
Read the full comparisonAiSU Strata vs ChatGPTChatGPT can’t access your documents. AiSU connects to your cloud storage and returns cited answers from your own files.
Read the full comparisonAiSU Strata vs GleanGlean is excellent enterprise knowledge search. AiSU delivers the same category of product — self-service, at a fraction of the cost.
Read the full comparisonAiSU Strata vs GuruGuru is a knowledge management platform you have to maintain. AiSU retrieves from the systems where your knowledge already lives.
Read the full comparisonSettle it on your own files.
A table cannot tell you whether the answer is right. Connect one source, ask the question you would normally dig for, and open the citation.
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