Professional Proofreading Services

Expert Human Proofreading for
 High-Stakes Documents

Publish with confidence, not crossed fingers. Get professional proofreading when accuracy, consistency, and credibility matter.

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4.9+ average rating
250+ professionals and organizations trust proofread.co
10M+ words proofread
“

Josiah was very responsive, efficient, and effective. I asked him to proofread a grant proposal and he finished within just a few hours with really excellent comments. His proofreading skills are great. He is direct in answering questions and providing feedback. I would definitely recommend him to anyone in need of proofreading.

John D'Attoma | Senior Data Scientist, Internal Revenue Service
Stop letting typos kill your credibility. Start hitting "Send" with confidence.

Readers notice mistakes faster than they notice your expertise. One error in a high-stakes document can overshadow everything else on the page.

But proofreading your own work doesn't work. After spending hours with your own words, you can't see your own typos, inconsistencies, or mistakes.

Stressed professional with head on desk after finding errors in business document

A coworker's “quick check,” spellcheck, and ChatGPT will not suffice either. They lack context, a trained eye, and human nuance. None of them catch the mistakes that can cost you your reputation.

Bottom line: Casual proofreading is a liability for high-stakes documents.

Before you publish, print, or pitch…

Your high-stakes documents deserve proofreading
from a trained expert.

I am a U.S.-based, dedicated proofreader for high-stakes documents.

I partner one-on-one with a small roster of clients, using my proofreading skills and broad industry knowledge to ensure their writing is flawless.

Every document gets the same meticulous attention:

  • Line-by-line proofreading
  • Formatting and layout review
  • Style guide enforcement
  • Technical accuracy checks
  • Light editing for clarity (as necessary)

You receive your document back in as little as 24 hours, with tracked changes, a clean final version, and a brief note with any additional recommendations. So you can finally hit send without second-guessing.

“

Josiah is by far one of the most highly skilled wizards of the English language I've ever worked with. He's able to proof all sorts of content from technical to marketing. I hesitate to give him a glowing review because he'll get so much work that he'll forget about us!

Marin Svorinic | Managing Director, Katusa Research

A Dedicated Proofreader Makes a Decisive Difference

Gain the confidence of a polished page.

Protect your reputation. Let perfect writing give you a reputation for excellence and perfection with colleagues and clients.
Communicate with precision and clarity. Make flawless your new standard, with ready-for-primetime documents, every time.
Spend your time on what matters. Stop re-reading your document and start spending your time on work that only you can do.
Enjoy strong reliability. You'll receive agency-level rigor and responsiveness with solo-proofreader flexibility and continuity.
Maintain confidentiality. Your documents are kept private by default, with an NDA available.
Gain peace of mind. Gain effortless confidence that your reputation is safe. Print, pitch, or publish with confidence.
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Who It's For

Proofreading tailored to your industry.

Marketing & Design Agencies Polished client deliverables, brand voice consistency, and deadline-ready copy. Learn more → Nonprofits & Mission-Driven Orgs Grant proposals, annual reports, and donor communications that command credibility. Learn more → Finance & Investment Professionals Precision-proofed reports, prospectuses, and client-facing documents where accuracy is non-negotiable. Learn more → Training & Learning Teams Instructional content, LMS materials, and facilitator guides reviewed for clarity and consistency. Learn more →
“

Josiah's work was thorough, on-time, and thoughtful. He delivered good work on this project and was professional and easy to work with. His review of our alumni magazine caught some important changes we needed to make for consistency and accuracy.

Stephanie Skordas | Director of Communications, Wake Forest School of Law

The Eyes Behind Proofread.co

Meet your personal proofreader.

Josiah, professional proofreader and founder of Proofread.co
Josiah Founder · Proofread.co
Trained under writing instructors from Harvard, MIT & Yale
Perfect scores on ACT & SAT English sections
Published in the Harvard Summer Review

I've seen even the most intelligent, educated business leaders make errors that disrupt, distract, and detract from their communication.

At the same time, I've found myself uniquely suited to eliminate those errors:

  • I've studied under writing instructors from Harvard, MIT, and Yale, giving me a keen eye for mistakes that are invisible to others.
  • I have learned how to rapidly become a subject matter expert in any industry, so I can proofread like I've been there for years.
  • I deeply enjoy proofreading—it is my personal flow state.

So I have dedicated my career to proofreading complex, high-stakes documents to ensure they have a lucid message and flawless content.

Over the past decade, I've used my skills to perfect thousands of investor letters, offering memoranda, white papers, and board presentations for clients like Rockefeller PA, TEDx, and the CDC—and I'm ready to do the same for you.

Meet Your Proofreader

Trusted by

Anywhere Real Estate BetterCloud Rockefeller Philanthropy Advisors Routledge CDC

Before You Hire

Smart questions to ask before hiring…

Most of my clients are strong writers, which is precisely why proofreading matters. When you are close to your work, your brain reads what you meant, not what it says. I bring a trained, external set of eyes to catch the errors and inconsistencies you can't see, before your audience does.

Critical documents deserve more than algorithms. Automated tools catch most surface-level issues (e.g., grammar, spelling, punctuation) while missing context, meaning, and subjective details that impact your credibility.

I provide the human judgment, rigor, and confidentiality that an AI or spellcheck tool cannot.

See Services for details—or if you're still keen to use AI, check out AI Assist.

No. I preserve your tone and voice while highlighting only errors. You decide which changes to keep.

Yes. I specialize in complex documents where accuracy, clarity, structure, and consistency matter: technical reports, regulated materials, executive communications, and those with reputational or legal risk attached.

No one. I routinely work with sensitive, pre-release, and internal materials, and it is all reviewed privately and treated as confidential by default. Unlike many AI tools or agencies, I will sign an NDA.

I can generally handle last-minute, high-pressure submissions, but rush slots are limited and frequently become unavailable. Contact me, and I will communicate up front about whether I can deliver on your timeline.

Or, if you're really pressed for time, sign up for AI Proofread to get your document proofread in as little as 15 minutes.

Don't make a mistake; trust someone who catches yours.

Explore Services

From investor letters to white papers, I proofread the high-stakes documents that define your reputation. See exactly what I check—and what you'll get back.

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Work Together

I've proofread thousands of documents for people just like you. I take a small number of projects each week. If you have a deadline looming, reach out now.

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Send a Message

I work best when I develop long-term professional relationships with highly competent people. Let's talk to see if I'm a good fit.

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