Professional English proofreading and editing services

Trusted by thousands of ESL speakers, students, and international businesses.

  • Subject-expert editors

    Experienced US/UK editors in your academic area.

  • A reputation for quality

    Read our verified reviews on TrustPilot.

  • Secure and confidential

    Secure, reliable and confidential service.

Frequently Asked Questions

  • All Questions
  • Services
  • Payments & Pricing
  • Quality Guarantee
  • Delivery & Times
  • Miscellaneous
  • How can I trust your service/company?

    Cambridge Proofreading LLC is a registered company in Illinois, U.S.A. We have served over 64,000 clients in 110+ countries. We recommend that you read our blog post about avoiding scam proofreading services and carefully review who you trust with your documents.

    You can verify our LLC registration and Certificate of Good Standing by searching our company name in the Illinois Department of Business Services database here.

    You can also view independent reviews from previous customers of our services on TrustPilot.

    We take payments via PayPal (accepts credit/debit cards), the Web’s most popular and secure payment gateway.

  • Will my files be kept secure and confidential?

    Any files submitted to Cambridge Proofreading LLC will be kept in the strictest confidence.

    Only the editing manager and the assigned editor will access your files. We will not share them externally under any circumstances.

    All client files are deleted from our system 21 days after we have returned the edited version. If you wish for us to delete them sooner, simply email us and we will be happy to oblige.

    We are happy to sign non-disclosure agreements (NDAs) if required.

  • Is your website secure?

    Yes; our website is secured with DigiCert SSL Extended Validation and 256-bit encryption.

    Files uploaded through our website are stored on a password-protected server. Only the editing manager and the assigned editor will have access to your file, and it will not be shared externally with anyone under any circumstances.

    Our service is 100% confidential.

  • Will you sign a non-disclosure agreement (NDA)?

    We are happy to sign NDAs upon request. Please contact us for more information.

  • What is your quality guarantee?

    The Cambridge Quality Guarantee covers all orders made on our website. It states that:

    If you are not satisfied with the service you have received and can cite fair justification, we will issue a partial or full refund.


  • Do you have a money-back guarantee?

    If you are not satisfied with the service that you have received and can cite fair justification, we will issue a partial or full refund. Please contact us if you have any questions.

  • How can I be sure of the quality of your services?

    Remember that you are protected by our the Cambridge Quality Guarantee, which states:

    If you are not satisfied with the service you have received and can cite fair justification, we will issue a partial or full refund. If you can cite a credible reason for any dissatisfaction, we will give you a refund.

    If your file is over 10,000 words, you may submit it to us via email (as an attachment) and we will provide a free sample of 500 words within 24 hours.

    Alternatively, you can view working samples of our work here.

  • What will my proofread and edited document look like?

    All the editor’s changes are highlighted using the Track Changes feature in Microsoft Word, which allows you to see where improvements have been made. Click here to see working sample files of our work.

  • How do you choose which editor will proofread my document?

    With over 100 editing professionals, we have experts across the full spectrum of academic disciplines. This broad base of expertise allows us to pair documents with editors who are familiar with their subjects/topics.

    The editing manager opens each file and evaluates the content. From there, it is assigned to the editor on our team who has the most appropriate experience and qualifications relevant to the paper’s subject/topic.

    Whilst we ensure that your editor has experience in your discipline, we cannot always guarantee that he/she will always be an expert in your sub-discipline. For example, if you submit a paper on molecular biology, we may pair it with an editor with a background in the wider discipline of biology but not necessarily in the specific sub-discipline of molecular biology.

    We believe that there is no substitute for subject-matter expertise.

  • How will you improve my writing?

    For a detailed explanation with an example, please see How We Proofread and Edit Texts.

    We proofread for:

    Grammar, punctuation, and typographical errors

    We edit for:


    Incorrect sentence structure and awkward phrasing

    Academic tone and style


    All the editor’s changes are highlighted using the Track Changes feature in Microsoft Word, which allows you to see where improvements have been made. Click here to see working sample files of our work.

    We can review your document in line with any specific guidelines (e.g., APA, MLA, Chicago, Harvard, Oxford, etc.) or requirements that you may have.

    If you’re looking for a cheap, basic and rushed proofreading service, we suggest you stop reading now and look elsewhere – though we advise you to be vigilant of scam websites.

    If, however, you are looking for a premium quality review and improvement of your writing at a good value price, we can help.

  • How will my document be returned to me?

    We will send a secure download link to your proofread and edited document via email.

    You will receive a link to download the ‘tracked’ version of your file, which will show the editor’s changes in highlighting.

    You will also receive a link to download a ‘clean’ version, which will have our changes in-text but will not have any tracking/highlighting.

    We will not send any physical/printed copies.

  • What are the key benefits of using your service?

    Please see ‘Why Choose us?’ and ‘How We Improve a Text’ for an overview of the benefits of our service.

  • Do you offer writing, paraphrasing, or translation services?

    No, we do not offer these services.

  • Can you work to a specific style guide/format?

    We can edit documents to specific style guides/formats.

    Among our 100+ editing professionals, we have format specialists across all the main style guides, including APA, Chicago, Harvard, OSCOLA, Oxford, and others.

    If your university or publishing house has provided specific guidelines, we may be able to accommodate these. Please contact us if you have questions.

  • What if I have follow-up questions?

    We are happy to answer any questions you may have after you have received your proofread and edited document. Simply contact us and we will provide a prompt and full response to your questions and requests.

  • Will you re-review changes that I make?

    After we have returned your document, should you make some changes to it, we will be happy to review them for you. There will be no extra charge, assuming that the changes are not too extensive (e.g., a few sentences/paragraphs, as opposed to entire pages).

    To review substantial changes – for example, the entire document or sizable sections of it – an additional charge will be applicable.

  • Can I request the same editor as before?

    Absolutely! Simply note this on the order form and we will assign your new order to the same editor who completed your prior work.

  • Can I have the same editor if I submit in parts?

    Yes, we would assign the same editor to each order that you submit to ensure consistency.

  • What if I am unhappy with the results?

    If you are unhappy with the work of the editor, please contact us and we will find a suitable resolution. This may be a free re-review by a different editor or a partial/full refund depending on the circumstances.

  • What are the editors’ experience/qualifications?

    All our 100+ editing professionals are native English speakers and alumni of leading U.S. and U.K. universities.

    As minimum criteria, all of our editors meet or exceed the following key standards:

    Advanced qualifications (first degrees, master’s degrees, and PhDs) from a U.S. or U.K. university
    At least five years’ experience in academic proofreading and editing or copy-editing
    Significant track records in academic publishing or the commercial sector
    Membership in leading industry bodies, such as the Society for Editors & Proofreaders (SfEP) and the Council of Science Editors

    Additionally, editors are put through a rigorous assessment process. Less than 1% of editors who apply are accepted into our network.

  • What file formats do you accept?

    The following file types are preferred, as they allow us to utilize the Track Changes feature in MS Word, which highlights the amendments made by the editor.

    Microsoft Word (doc, docx, rtf)
    Open Office (odt)
    Apple Pages

    We also accept:

    PDF (see below)
    LaTeX (see below)

  • Do you accept LaTeX files?

    We are unable to edit LaTeX files directly. However, if you export or copy and paste your LaTeX source code into a Microsoft Word document, we will leave any programming commands unedited. You can then review our changes in Word and copy and paste the text back into the LaTeX source code.

  • What are your prices?

    We have flat-rate pricing based on word count, service level (one-editor or two-editor) and turnaround time. Enter your word count into our pricing calculator for an instant quote and return time.

  • Will your service affect my plagiarism/Turnitin score?

    No, our service will not have any impact on your plagiarism or Turnitin score. Any files that you send to us are kept securely and are not shared with outside parties. See: confidentiality policy for more info.

  • How can I be sure you are the best option for me?

    We are a trustworthy organisation with a reputation for excellent work and customer service. Read some independent reviews from our previous clients on TrustPilot here.

    We charge medium-range prices for premium quality work.

    We believe that there is no substitute for subject-matter expertise. Across our team of over 100 editing professionals, we have experts in almost every academic discipline.

    Our experienced editors handle thousands of documents for satisfied clients all over the world every year. The majority of our work comes from repeat customers or word-of-mouth referrals. Indeed, the chances are that you found us through the recommendation of a colleague or friend.

    Our Quality Guarantee means that you can be confident that we will deliver highly satisfactory work for you.

  • How do I order? What is the complete process?

    It is quick and easy to place an order for our service.

    – Navigate to our Order Form page and enter your contact details.

    – Upload your file(s) securely to our server. Our website is secured by GeoTrust EV SSL (more information). They will be kept in the strictest confidence.

    – Specify any notes or requirements you may have for the editor.

    – Select your preferred price/turnaround time.

    – Make payment using a credit or debit card via Braintree or PayPal.

    – Your order is complete.

    – You will receive an email confirmation, which will contain a link to track the status of your order.

    The editing manager will review your document and assign it to an editor with expertise relevant to your topic.

    We will return your proofread and edited file via email within the deadline.

    If you have any difficulties with the ordering process, please feel free to contact us for assistance.

  • What are your payment options?

    We have several options for making payments and accept U.S. dollars, British pounds, and euros.

    Our on-site card payments are securely processed by BrainTree (a PayPal company). Braintree accepts all major credit and debit cards, including Visa, MasterCard, Amex, Maestro, and others.

    We also accept payments via PayPal, the world’s most popular payment gateway. PayPal accepts all major credit/debit cards and is highly secure. You do not need to register an account with PayPal if you choose the “check out with card option.”

    Upon request, we are also able to accept bank transfers to our U.S. bank account. Please contact us if you wish to use this option.