E-signature and online document tools let you prepare, fill, sign, and manage documents entirely online instead of printing, signing, and scanning. At the core is the electronic signature itself — a legally-binding way to execute agreements that, under laws like the U.S. ESIGN Act and UETA, generally carries the same weight as a pen-and-paper signature for most everyday business documents.
Beyond signing, the better products bundle PDF editing, reusable form fields and templates, audit trails, and storage, so a single workflow can take a document from draft to fully executed and filed. Some lean into integrations — DocHub, for example, works directly inside Google Workspace — while others, like iubenda, focus on generating the compliance documents a website or app must publish rather than on signing.
This comparison lists four widely used tools alphabetically and compares them on signing, editing, integrations, and ease of use, so you can match a product to the job you actually need done. It is informational, not legal advice, and listing here is not an attorney endorsement of any product. For high-stakes agreements or questions about whether an e-signature is valid in your jurisdiction, consult a licensed attorney.