AttachKitvs. the big PDF & e-signature tools
Honest, side-by-side comparisons. Where AttachKit wins (privacy, flat pricing, no recipient signup) — and where the incumbent is still the better pick. No PDF ever leaves your browser.
The original PDF tool — viewer, editor, signer, form filler, all in one suite.
A free-leaning browser PDF editor and e-signature tool with deep Google Workspace and Gmail integration.
The market-leading e-signature platform, used by most enterprises.
A mature, lower-cost Adobe Acrobat alternative — desktop editor, cloud, and eSign.
Dropbox-owned e-signature platform, popular with small businesses.
A huge server-side PDF suite — convert, compress, merge, edit, OCR, sign, plus AI tools.
A mature, Windows-first Adobe Acrobat alternative (Nitro PDF Pro) plus a cloud e-signature platform (Nitro Sign).
Document automation platform — proposals, contracts, quotes, e-signature.
A free, ad-supported German PDF toolbox — ~30 online tools plus a local Windows app.
A long-running, ad-supported browser PDF editor and form filler.
An online form filler and e-signature service (airSlate) with a huge searchable library of fillable forms.
A free, AI-powered PDF app — local desktop editing plus an AI Copilot and online tools.
A clean, privacy-conscious PDF toolkit — web tools that auto-delete, plus a local desktop app.
Mid-market e-signature from airSlate, popular with SMBs.
Box-owned e-signature with a focus on simplicity and lower pricing than DocuSign.
A clean, affordable e-signature tool for small businesses (formerly Docsketch).
Browser-based PDF tools — convert, compress, edit, sign.
A self-hosted, open-source PDF toolbox — ~50 tools you run yourself via Docker.
Apryse's cross-platform PDF suite — strong apps, web tools, Xodo Sign, and AI.
Or just try it — drop a PDF, nothing to install.