TSS Publishing in the UK will critique short stories and flash fiction by word count and aim to provide feedback within a business week.
Winning Writers also offers critiques for poems, stories, and essays for a flat rate up to 6K words. Allow 6 weeks.
https://winningwriters.com/critiques/critiques-for-poems-stories-and-essays
Here's the link to Winning Writers critiques for books and manuscripts.
https://winningwriters.com/critiques/critiques-for-books-and-manuscripts
Writer's Digest Critiques use Track Changes within the document and a summary critique for $5 per page. Within one business week, they will contact you with the estimated turnaround time.