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2siq
Automatically detects errors and provides tailored suggestions to refine user-written emails for any occasion.
You will find 2siq under Email Assistant. It does not publish a price, so expect to ask for one. Checked on 25 September 2026: the site was up.
Everything above is fact we checked ourselves. Our own assessment of this tool is still to be written — we would rather say so than pad the page out.
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