Comparisons
Tools for signing PDFs in 2026: Google Drive, Adobe, DocuSign, iLovePDF and Sygnau
A practical comparison of PDF signing tools depending on whether you want to sign yourself, request signatures, or manage recurring authorizations.
Sygnau team · · 9 min read
The best tool depends on one very specific question: do you want to add your own signature to a PDF, request someone else's signature, or manage hundreds of authorizations linked to participants?
These aren't the same problem. A general-purpose app can be ideal for signing a one-off document, but fall short when a school needs to know which families still haven't responded. And a full contract platform can be overkill for a simple authorization.
This comparison doesn't rank absolute winners. It summarizes which scenario each option best fits, based on the features published by providers as of August 2026. Features and terms may change.
Quick comparison
| Tool | Especially fits | Requesting signatures | Account needed for sender | Key differentiator |
|---|---|---|---|---|
| Google Drive / Docs eSignature | Teams already on a compatible Workspace plan | Yes | Yes, compatible plan | Integration with Docs and Drive |
| Adobe Acrobat | Filling in, editing, and signing PDFs; Acrobat workflows | Yes | Yes, to send requests | Very complete PDF ecosystem |
| DocuSign | Contracts and enterprise signing workflows | Yes | Yes, to send | Traceability, integrations, and agreement management |
| iLovePDF | PDF tasks and one-off signing on the same site | Yes | Yes, to request signatures | Many PDF tools in one place |
| Sygnau | Authorizations for groups and participants; create from PDF/photo | Yes (link to signer) | Yes (sender) | Participants, tracking, and hybrid paper |
Google Drive and Google Docs eSignature
Google lets you prepare and send signature requests from Google Docs and from PDFs in Drive, on compatible Workspace accounts. The sender can add fields for multiple signers, send the request, check its status, and view an audit trail of the completed agreement.
It's a convenient option if the whole organization already lives inside Google Workspace. You need to check eligibility: the feature doesn't simply come with a free Drive account and is available on certain Workspace or Workspace Individual plans.
Ideal for: one-off documents created in Docs or stored in Drive.
May fall short if: you need to link signatures to lists of participants, groups, guardians, specific fields, and authorization tracking dashboards.
Adobe Acrobat
Adobe offers tools to fill in and sign PDFs, both on the web and in Acrobat. Users can type, draw, or add an image of their signature. The request feature lets you send a PDF to third parties and assign fields for them to fill in.
It's especially powerful when the PDF is at the center of the workflow: editing, forms, conversion, review, and signing. Some features require signing in or a specific plan.
Ideal for: professionals who work intensively with PDFs and want a broad set of tools.
May fall short if: the main problem isn't editing the PDF, but managing an authorization campaign for participants.
DocuSign
DocuSign is a platform specialized in electronic agreements. It lets you send documents, assign fields, track status, keep evidence, and integrate the flow with other systems. Recipients can usually sign a request without creating an account; the sender does need an account to prepare and send.
Its breadth is an advantage for contractual and business processes, but it can involve more setup and cost than necessary for simple cases.
Ideal for: businesses with a volume of contracts, integrations, approvals, and agreement management needs.
May be overkill if: you just want a quick authorization or a simple process for a small organization.
iLovePDF
iLovePDF combines signing with many other tools: merging, splitting, compressing, converting, protecting, or editing PDFs. Its tool lets you sign personally and also request signatures; sending requests requires signing in, according to published documentation.
It's a practical alternative when the main need is a one-off PDF task. Before uploading sensitive documents to any online service, review data handling, location, retention, and applicable terms.
Ideal for: users who need a variety of PDF tools plus occasional signing.
May fall short if: you want to manage participants, responses, groups, and authorizations on a recurring basis.
Sygnau
Sygnau doesn't try to win every category. Its area of focus is simplifying two situations:
- Recurring authorizations: a school, club, parents' association, or organization creates the authorization, links it to groups and participants, publishes a link (open, code-protected, or personal) and checks who has signed and who's missing. Families sign on their phone without creating an account.
- Creating from a PDF or photo: you can digitize an existing form using AI, review it in the builder, and publish it. It's not a generic "upload a PDF and request a contractual signature" flow like DocuSign; it's built around activity authorizations.
The signature is an SES (drawn or scanned paper) with PDF, hash, and public verification. It does not offer AES or QES.
Ideal for: organizations that still manage authorizations on paper, PDFs shared over WhatsApp, emails, and separate spreadsheets.
May fall short if: you need an advanced or qualified signature, SSO/API, or a specific legal formality.
How to choose in 30 seconds
- You just need to put your signature on a PDF: Adobe, iLovePDF, or a local option on your device may be enough.
- You already use a compatible Google Workspace plan: try Docs/Drive eSignature.
- You manage business contracts and integrations: consider DocuSign or an equivalent platform.
- You need to collect authorizations from groups and know who's missing: look for a participant-focused tool like Sygnau.
- The document requires strong identity verification, AES, or QES: check that the provider and the flow explicitly offer that level.
Privacy before convenience
Don't install or authorize just any app simply because it promises free signing. A PDF can contain ID numbers, addresses, information about minors, health data, or confidential contracts.
Before using a tool, ask:
- Is the document processed locally or uploaded to a server?
- In which country or region is it stored?
- How long is it kept?
- Can it be deleted?
- What data ends up in the audit log?
- Does the recipient need an account?
- What signature level does it actually produce?
A simple interface matters, but so does knowing what happens to the document.
Sources
- eSignature in Google Docs and Drive — Google Workspace
- Google Docs and Drive eSignature help
- Sign and request signatures — Adobe Acrobat
- DocuSign eSignature
- Sign PDF — iLovePDF
- Comparison of PDF signing apps — Xataka Móvil
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