I would recommend Stickler. They did a perfect job for copy editing my papers

I've used STICKLER's proofreading services multiple times, and I'm consistently impressed with their attention to detail and professionalism. Highly recommend!

I am very thankful to Jinny Hayman at Sickler Inc. I got support for proofreading from Jinny. The process helped me to improve my work significantly. Since the time I sent the work, I got timely reply with all the work proofread in very professional ways with high academic standards. The remarks regarding style, grammar, sentence rewriting as well as the various other formatting aspects were helpful for me to submit my work successfully at my Institute and for further endeavours. Thank you Jinny for this great support. I recommend academicians to get support of Jinny (@Stickler Inc.) for proofreading and improve the quality of your academic writing.