Electronic Signature Software: A Buyer's Guide
Electronic signature software turns a paperwork bottleneck into a two-minute step. Instead of printing, signing, scanning, and emailing a contract back, the signer clicks a link, signs in the browser, and the system records a tamper-evident audit trail. For sales teams, that compressed signing step is often the difference between closing this quarter and slipping into the next. The category has a clear leader and a handful of strong alternatives, and the right choice depends less on features than on where the document comes from. This guide covers how e-signature works, the main tools, what they cost, and how to choose.
How Electronic Signatures Work and Why They Are Legal
An electronic signature is any electronic mark that shows intent to sign. In the United States, two laws make them enforceable: the federal ESIGN Act of 2000 and the Uniform Electronic Transactions Act adopted by most states. Together they give an electronic signature the same legal weight as a wet signature for most business contracts.
What makes e-signature software trustworthy is the audit trail. When a document is signed, the platform records who signed, when, from what IP address, and in what order, then seals the document so later tampering is detectable. That evidence is what holds up if a contract is ever disputed. The signature itself is the easy part. The audit trail and tamper-evidence are what you are actually paying for.
For B2B sales specifically, e-signature lives at the end of the deal cycle, right after the quote or proposal. It connects to proposal management and CPQ on one side and to your CRM on the other.
Adobe Acrobat Sign (Formerly Adobe Sign and EchoSign)
Adobe's e-signature product has had three names. It launched as EchoSign in 2006, became Adobe Sign in 2016 after Adobe acquired it, and is now Adobe Acrobat Sign, part of Adobe Document Cloud. If your team already works in Acrobat and lives in PDFs, this is the path of least resistance: signing is built into the same tool you use to create and edit the document.
Because it ships inside Adobe's document suite, Acrobat Sign fits organizations standardized on Adobe more than it fits a sales team picking a signing tool in isolation. The signing experience, branded documents, status notifications, and multi-signer workflows are all there. Confirm the current plan structure on Adobe's own pricing page, because Adobe bundles e-signature into several Acrobat tiers and the packaging changes over time.
Dropbox Sign (Formerly HelloSign) and DocuSign
Dropbox Sign is the product formerly known as HelloSign, which Dropbox acquired in 2019. It built its reputation on a clean, well-documented API and simple plans, which is why developers and small teams gravitate to it. If you want to embed signing into your own product or run a lightweight signing workflow without enterprise overhead, Dropbox Sign is a strong fit. It offers a free trial so you can test the flow before committing.
DocuSign is the category leader and the default for enterprise. When legal, procurement, or compliance teams have an opinion about your signing tool, they usually already trust DocuSign, which shortens internal approval. It carries the broadest integration ecosystem and the deepest feature set for complex, regulated signing. The trade-off is cost and complexity relative to the lighter tools. See the e-signature category page for the full lineup and the DocuSign profile and Adobe Sign profile for details.
How to Choose an E-Signature Tool
The deciding question is where your document originates.
If the document is a sales quote or proposal, pick a sales-native tool that bundles signing into the proposal. PandaDoc, your CRM's built-in quoting, or a CPQ platform all include e-signature, so the buyer signs in the same flow that delivered the price. Bolting a standalone signing tool onto a proposal tool you already have just adds a second login and a second bill. The CPQ software guide covers where signing fits in the quote-to-close chain.
If the document is a contract that comes from legal, procurement, or HR, pick a dedicated e-signature platform. DocuSign is the safe enterprise default. Adobe Acrobat Sign wins when the team is already standardized on Adobe. Dropbox Sign wins for developer-led or small-team use that values a simple API and clean plans.
Whatever you choose, verify two things before signing the contract yourself: that the audit trail meets your legal team's evidentiary bar, and that the tool integrates cleanly with your CRM so signed documents and their status flow back automatically instead of being re-keyed by hand.
Frequently Asked Questions
What is electronic signature software?
Electronic signature software lets people sign documents online in a browser instead of printing and scanning. It captures the signature, records a tamper-evident audit trail of who signed and when, and seals the document. Under the US ESIGN Act and UETA, these signatures carry the same legal weight as handwritten ones for most business contracts.
Is Adobe e-signature part of Acrobat?
Yes. Adobe's e-signature product, now called Adobe Acrobat Sign, is part of Adobe Document Cloud and is bundled into several Acrobat plans. It was originally EchoSign, launched in 2006, and was renamed Adobe Sign in 2016 before becoming Adobe Acrobat Sign. Check Adobe's pricing page for which current Acrobat tiers include signing.
Is Dropbox Sign the same as HelloSign?
Yes. Dropbox Sign is the rebranded name for HelloSign, which Dropbox acquired in 2019. The product kept its developer-friendly API and simple plan structure after the rebrand, which is why it remains popular with engineering teams and small businesses that want to embed signing.
Does Dropbox Sign have a free plan?
Dropbox Sign offers a free trial so you can test the signing workflow and API before paying. Plan structures and any free allowances change over time, so confirm the current free trial terms and paid tiers on the official Dropbox Sign pricing page before you commit.
Which e-signature tool is best for sales teams?
If signing is the final step of a sales quote, a sales-native tool that bundles e-signature into the proposal is usually best, such as PandaDoc, your CRM's built-in quoting, or a CPQ platform. For standalone contracts from legal or procurement, DocuSign is the enterprise default, Adobe Acrobat Sign suits Adobe-standardized teams, and Dropbox Sign suits developer-led or small-team use.
Reviewed by Rome Thorndike. Last verified 2026-06-27.
Pricing, features, and ratings are based on vendor documentation, public filings, product demos, and feedback from sales teams using these tools in production. We update reviews when vendors ship major releases or change pricing.