Are electronic signatures legally binding?

In the U.S., electronic signatures are enforceable for most business agreements under the ESIGN Act and UETA, and reputable e-sign tools capture an audit trail to help prove intent and consent. Some documents (such as certain wills, court filings, or notarized items) may still require special handling, so check requirements for anything unusual.

Do I need a full proposal tool or just an e-signature app?

If you mainly send documents you already have, such as NDAs, offer letters, or client contracts, a focused e-sign tool is faster and cheaper. If your core job is building and closing proposals or quotes, a proposal-first platform like PandaDoc that combines creation, e-sign, and tracking is usually worth it.

What should I watch for in pricing?

Look closely at per-seat costs and any caps on the number of documents or 'envelopes' you can send each month. High-volume senders can outgrow entry plans quickly, so match the plan to your realistic monthly sending volume rather than the headline price.

Will signers need to create an account?

With most modern tools, recipients can sign from a link on any device without creating an account, which reduces drop-off. Confirm this in the product you choose, since a smooth signer experience directly affects how fast your documents get completed.

Can e-signature tools connect to the software I already use?

Most offer integrations with common CRMs, Google Workspace or Microsoft 365, cloud storage, and sometimes payments, so signed documents flow into your existing systems automatically. If a specific integration matters to you, verify it is supported on your intended plan before committing.

Best E-Signature & Proposal Software (2026)

E-signature software lets your business send documents for legally binding signature online, so a contract, quote, or consent form can be signed on any device in minutes instead of being printed, scanned, and mailed. Under laws like the U.S. ESIGN Act and UETA, electronic signatures are enforceable for most business agreements, and good tools add an audit trail that records who signed, when, and from where.

For an SMB, the payoff is faster deal cycles and fewer stalled agreements: sales contracts close sooner, new hires and clients get onboarded without paperwork friction, and everything stays in one searchable place. Even a small team routinely sends offer letters, NDAs, statements of work, and renewals, and chasing wet-ink signatures quietly costs days on each.

How you choose depends on what you actually send. If you mostly need signatures on documents you already have, a focused e-sign tool is fastest and cheapest. If your documents are proposals and quotes you build and then send to close deals, a proposal-first platform earns its keep. Weigh sending volume, whether you need templates and integrations with your CRM or Google Workspace, mobile use, and any compliance requirements before committing.

Our top E-Signature & Documents picks

Who each pick is actually for

Two facts below, both arithmetic rather than opinion, taken from the review scores in our catalog. Neither is a recommendation, and a high score from a small group of users is a different claim from a high score at scale, so the sample size is shown alongside every figure.

Most reviewed

PandaDoc

4.7 across 3,324 reviews

Worth knowing what that sample is actually measuring. PandaDoc is proposal software with signing built into the closing document, so most of those reviewers came for the templates and the quote builder, not for a signature field. If all you need is to get a contract signed, you are buying a document creation platform to use one part of it. The name people search for in this category is DocuSign, which sits at 4.5 across 2,594 reviews, a smaller sample than either tool named here, and starts at $11 a user while both of these have free tiers.

Highest rated

Xodo Sign

4.8 across 2,833 reviews, a score it shares with 3 other tools here and holds on the largest sample

A name most buyers have never heard, on a sample larger than DocuSign's, which makes it one of the better-tested high scores in our catalog. Formerly eversign and now owned by Apryse, it does the actual job: audit trails, reusable templates, in-person signing, an API, and a free tier. The reason it does not simply win the category is recognition. If your counterparty expects a familiar signing brand in the email, that expectation is a real cost, and it is one you are choosing to bear rather than one the product forces on you.

None of that decides it for you

The signature has to survive a regulator: OneSpan Sign - Strong signer authentication, detailed evidence trails, and an on-premises deployment option, which is why banks and insurers standardize on it. At $22 you are paying for the evidence rather than for the signing, and if nobody is ever going to challenge the document you are overpaying.
Your signers are in the EU: Yousign - eIDAS-compliant signing from a French qualified trust service provider, with EU data hosting and qualified electronic signatures for documents that need the top tier. A US-hosted tool can produce a perfectly valid signature and still fail a data residency requirement, which is a separate question from whether the signature holds.
You sign standing in someone else's kitchen: Signeasy - Mobile-first signing built for phones and tablets at $10, aimed at realtors, inspectors, and field teams. Desktop-first platforms technically work on a phone, and anyone who has tried to place initials on a page that way at a client's table knows what that costs.
Signing has to happen inside your own product: Dropbox Sign - An embeddable signing API with a free tier to build against, so the user never leaves your app for a vendor page. Formerly HelloSign, and its sample here is larger than DocuSign's, so the developer-friendly reputation is not just marketing.
You already pay for Adobe Acrobat: Adobe Acrobat Sign - The signing service attached to the PDF tools you are already licensing, which removes both the second subscription and the export step between editing and sending. At $16.99 it is the most expensive option on this list if Acrobat is not already in your stack.
You are one person sending proposals: Better Proposals - Branded interactive proposals with a signature and a payment at the end, for $13. GetAccept at $25, Proposify at $29, and Qwilr at $35 do the same job with sales team workflow wrapped around it, and price for the team you do not have.
The contract still matters a year after it is signed: Juro - Contract lifecycle management: a searchable repository, approval routing, and renewal visibility, instead of a folder of signed PDFs nobody can query. Custom pricing, and it only makes sense once contract volume has become someone's actual job.

What to look for

Legal validity and audit trails: compliance with ESIGN/UETA (and eIDAS if you operate in the EU), plus a tamper-evident record of each signature.
Sending limits and pricing model: check whether plans cap monthly documents or seats, since per-envelope limits can bite high-volume senders.
Templates and reusable workflows: saved documents, signing order, and automatic reminders that cut repetitive setup.
Integrations: connections to your CRM, Google Workspace or Microsoft 365, payments, and storage so signed docs land where you work.
Ease of use for signers: a clean, mobile-friendly signing experience with no forced account creation for the recipient.
Fit to document type: a plain e-sign tool for existing files versus a proposal/quote builder if creating and closing deals is the real job.

Frequently asked questions

Are electronic signatures legally binding?: In the U.S., electronic signatures are enforceable for most business agreements under the ESIGN Act and UETA, and reputable e-sign tools capture an audit trail to help prove intent and consent. Some documents (such as certain wills, court filings, or notarized items) may still require special handling, so check requirements for anything unusual.
Do I need a full proposal tool or just an e-signature app?: If you mainly send documents you already have, such as NDAs, offer letters, or client contracts, a focused e-sign tool is faster and cheaper. If your core job is building and closing proposals or quotes, a proposal-first platform like PandaDoc that combines creation, e-sign, and tracking is usually worth it.
What should I watch for in pricing?: Look closely at per-seat costs and any caps on the number of documents or 'envelopes' you can send each month. High-volume senders can outgrow entry plans quickly, so match the plan to your realistic monthly sending volume rather than the headline price.
Will signers need to create an account?: With most modern tools, recipients can sign from a link on any device without creating an account, which reduces drop-off. Confirm this in the product you choose, since a smooth signer experience directly affects how fast your documents get completed.
Can e-signature tools connect to the software I already use?: Most offer integrations with common CRMs, Google Workspace or Microsoft 365, cloud storage, and sometimes payments, so signed documents flow into your existing systems automatically. If a specific integration matters to you, verify it is supported on your intended plan before committing.