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AttachKit
Alternative · Sejda

AttachKit vs. Sejda — both privacy-minded; AttachKit never uploads at all

Sejda: A clean, privacy-conscious PDF toolkit — web tools that auto-delete, plus a local desktop app.

Sejda is one of the more privacy-conscious PDF tools — EU-based, no account required, and it auto-deletes uploaded files after two hours. It even offers a desktop app that processes files locally. The catch: the free, default, in-browser tools still upload your file to Sejda's servers, and the local desktop option sits behind their paid annual plan. AttachKit's local-in-the-browser processing is the default for everyone, free, with nothing to install.

Why pick AttachKit for these cases

  • Both are privacy-minded — but AttachKit never uploads the file, so there's nothing to auto-delete.
  • In-browser processing is the free default; Sejda's local option is a paid desktop app.
  • No 3-task-per-hour cap on AttachKit's in-browser tools.
  • AI auto-fill + verifiable signatures Sejda doesn't offer.

Side-by-side

A marks the side with the genuine advantage on that row — honestly, including the few where Sejda wins.

Where your PDF is processed
SejdaSejda's web tools upload your file to their EU servers (auto-deleted after 2 hours). Their desktop app processes locally — but it's part of the paid annual plan.
AttachKitIn your browser, by default, for free — the file never leaves your device, and there's nothing to install.
Privacy posture
SejdaGenuinely strong for a server-side tool: EU/Netherlands (GDPR), no account needed, uploads deleted after 2 hours, TLS in transit.
AttachKitThere's no upload to delete — the file stays on your device. Send-to-sign, when you choose it, is end-to-end encrypted.
Price
SejdaFree web tier capped at 3 tasks/hour (≤50 MB, ≤200 pages). Paid: ~€8.50/user/mo, or ~€71/user/yr for the desktop+web plan. Per user.
AttachKitFree: unlimited in-browser fill, edit & redact + 15 signed PDFs/mo. Pro $12/mo (or $120/yr), flat — no per-user fees, no hourly task cap.
AI & auto-fill
SejdaNo AI features, and no saved-profile autofill — form-filling is manual.
AttachKitAI auto-fill from your saved profile + AI PII redaction, included — and the PDF never leaves your browser to use them.
PDF → Word / Excel
SejdaYes — server-side (the file is uploaded).
AttachKitYes — in your browser, nothing uploaded, with images/tables/links carried into Word and typed cells in Excel.
Verifiable signatures
SejdaFill & sign (place a signature) — no independent verification flow.
AttachKitSelf-sign in-browser plus an offline-verifiable signature anyone can check, free.

Switching questions, answered

Sejda deletes my files after 2 hours — isn't that private enough?
It's a genuinely good policy, and Sejda is one of the more privacy-conscious tools out there. But 'deleted after 2 hours' still means your document was uploaded and sat on a server for those 2 hours. AttachKit processes the file in your browser, so it's never uploaded in the first place — there's nothing to delete.
Sejda has a local desktop app too — how is AttachKit different?
Sejda Desktop does process files locally, which is great — but it's a separate install gated behind their paid annual plan. AttachKit's local processing runs in any browser, on any device, free, with nothing to install. You also get AI auto-fill and verifiable signatures, which Sejda doesn't have.
Is Sejda or AttachKit better for occasional use?
Sejda's free web tier caps you at 3 tasks per hour; AttachKit's in-browser tools (fill, edit, redact, convert, compress, merge) have no hourly cap and the file never uploads. For occasional, privacy-sensitive jobs, AttachKit is the lighter-weight pick.

Try AttachKit now

Drop a PDF — no signup. Unlimited fill & redact in your browser, plus 15 free signed PDFs every month.

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