InterviewCaddy VS KeptPDF

InterviewCaddy's answer

InterviewCaddy covers both halves of interview preparation in one product. Mock Interview runs voice-first practice sessions tailored to your resume, target role, seniority and company, with natural follow-up questions the way a real interviewer would ask them. Every session ends with feedback scored across four dimensions and rewritten versions of your answers, so you can hear what a stronger response sounds like. Live Assist then gives you real-time, structured talking points during live conversations, which you can use, adapt or ignore while answering in your own words

KeptPDF's answer:

KeptPDF runs entirely in your browser. Your file, and the text inside it, never leaves your device. Not to an AI, not even to us. You can open your browser's network tab and watch: the document bytes never go out.

Most online PDF tools upload your file to a server first, and some "AI redaction" services quietly send your document text to a third-party model. That is the exact risk people are trying to avoid when they redact something.

KeptPDF also does true redaction. The text is removed from the file, not covered with a black box you can copy out later. Every redaction produces a verification certificate you can share with the file.

InterviewCaddy's answer

Most tools in this space do one thing. Some are mock interview trainers, others are real-time copilots. InterviewCaddy does both with one account, so the practice you do in mock sessions and the support you get in live conversations come from the same place. Practice is spoken, not typed, because real interviews are spoken. Product mode includes company-specific case interviews, not just generic questions. Plans are flexible too, with a weekly option for candidates who have one interview loop coming up and don't want a long subscription.

KeptPDF's answer:

Three reasons.

Privacy you can verify, not just a promise. Processing happens locally in the browser, so there is no upload step to trust. We do send anonymous usage counts for quota, and we say so plainly, but never your document.

Real redaction with proof. Removed text is permanently gone, and you get a certificate showing the file was checked for leftover extractable text. Automated detection cannot catch everything, so a final human review is still your job, and the tool says that too.

It works on a phone. Most PDF suites assume a desktop. KeptPDF was built and used on a phone first, so redacting a document while you are standing in a hallway actually works.

InterviewCaddy's answer

Anyone preparing for a structured interview. That includes product managers, software engineers and other tech professionals facing behavioral, technical and product case rounds, as well as strategy and consulting candidates practicing case interviews. It is also built for people on the other side of the process: recruiters, HR teams and career coaches who want to help candidates prepare with realistic, repeatable practice and clear feedback. Most users are professionals who know their work well but want realistic repetition before a high-stakes interview.

KeptPDF's answer:

Anyone who has to hand a document to someone else and needs the sensitive parts gone first.

In practice that is solo attorneys and small law firms, accountants and tax preparers, healthcare and records staff handling requests, HR teams, and individuals dealing with their own medical, legal, or financial paperwork.

The common thread is not an industry. It is a person who cannot upload a confidential file to a random website, and who does not have an enterprise IT budget to solve it.

InterviewCaddy's answer

InterviewCaddy was built after seeing too many qualified candidates fail interviews for reasons that had nothing to do with their ability. Nerves, rusty storytelling, time zone gaps, or simply not having anyone to practice with at 11pm before a 9am loop. Good coaching exists, but it's expensive and hard to schedule. We wanted practice that feels like a real interview, is available any time, and tells you honestly how you did and how to improve.

KeptPDF's answer:

A family member got seriously ill. We spent most days at the hospital, and straight answers were hard to come by, so we leaned on AI tools to make sense of the records, notes, and lab results.

But you cannot paste a medical record into an AI chat. You have to strip the names, the ID numbers, the diagnoses first. And almost every tool we found either wanted to upload the whole file to a server, or "auto-redacted" by sending the document text to an online AI. That was the exact thing we were trying to avoid.

Most of this was happening on a phone, at a bedside. So I built the tool I needed: redaction that runs on the device, works on mobile, and never sends the file anywhere. That turned into KeptPDF, which is now a full PDF suite with over 20 tools, all local-first.

InterviewCaddy's answer

InterviewCaddy is a Windows desktop app and a web app. It's built with a real-time conversational engine and AI models.

KeptPDF's answer:

The app is plain JavaScript with no front-end framework, which keeps it fast and keeps the code auditable.

PDF work happens in the browser using pdf.js for rendering and pdf-lib for writing. Text recognition uses Tesseract running as WebAssembly. Password and encryption handling uses a WebAssembly build of qpdf. It is a Progressive Web App, so it installs and works offline.

The thin server side is Node on Vercel, with Postgres for accounts, Stripe for billing, and Resend for email. None of those ever see a document.

InterviewCaddy's answer

InterviewCaddy serves job seekers in every field, from tech and product to HR, preparing for interviews.

KeptPDF's answer:

KeptPDF is early and independent, and we do not publish customer names. The product is privacy-first by design: we never see your documents, and we do not track who our users are or what they work on. Publishing a client list would sit badly next to that.

The user base today is mostly solo attorneys, small firms, accountants, and individuals handling their own records.