Form Plugins With E-Signature for Contracts and Client Onboarding
One feature, four prices, and the spread is the article. A signature field costs $63 a year with Fluent Forms, where it is included at every tier. It costs $159.60 with Formidable, which puts it in Business. It costs $199.50 with WPForms, which puts it in Pro. It costs $259 with Gravity Forms, where the Signature add-on is Elite-only.
Before you pick one, there is a prior question that matters more than the price: whether you need a drawn signature or a legally defensible one. Those are different products, and a form plugin only reliably delivers the first. This article covers both, and the audit trail that separates them.
Verified August 2026. Prices confirmed against vendor pages. Practical guidance, not legal advice.
A drawn squiggle is not the same as an e-signature
Electronic signatures are legally valid for most agreements in most places. In the US, ESIGN and UETA establish that a signature cannot be denied effect merely because it is electronic. In the EU, eIDAS does the same and adds a ladder: simple, advanced and qualified electronic signatures, with increasing identity assurance.
What makes a signature hold up is not the image of the squiggle. It is evidence: that a specific person signed, that they intended to, that they saw the document they were agreeing to, and that neither the document nor the signature has changed since. A form plugin capturing a drawn line into a database field produces the squiggle and, on its own, very little of the evidence.
That does not make form plugins useless here. For low-risk, high-volume agreements, a photography release, a gym waiver, a workshop consent form, the risk of a dispute is small and the cost of a dedicated e-signature platform per document is disproportionate. For anything with real money or real liability attached, the calculation reverses. The honest split is by consequence, not by convenience.
The 6 options compared
1. Fluent Forms
The cheapest signature field in the category by a factor of four, because Fluent Forms does not tier features. $63 a year for one site, $127 for five, $239 for unlimited, with lifetime licences at $279, $479 and $719.
For a business signing a steady trickle of low-risk agreements, the $279 lifetime single-site licence is the standout number here: it is roughly one year of WPForms Pro and it never renews. You also get every other capability in the same purchase, so the same licence handles the intake form, the file upload and the CRM handoff. What you are not buying is an evidence package. If your agreements need a certificate of completion, treat this as the wrong tool rather than a cheap version of the right one.
- Signature tier: Every tier, from $63/yr or $279 lifetime
- Evidence: Basic; entry timestamp and stored image
- Best for: Low-risk agreements at volume, on a budget
- Watch out for: No certificate of completion
2. Formidable Forms Business
$159.60 introductory against $399 regular, covering seven sites, with e-signature available from the Business tier upward. Basic at $35.55 and Plus at $89.55 do not include it.
What Formidable adds over a bare signature field is what happens around it. Business also includes save-and-resume with auto-save, and calculations are in every tier, which together suit onboarding documents that compute a fee, save partway through and end in a signature. For an agency or consultancy whose engagement letter includes a pricing table the client fills in, that combination is the reason to choose it. Watch the renewal: $399 regular is a significant step from $159.60, and the seven-site tier is the value point rather than Elite.
- Signature tier: Business, $159.60 introductory, $399 regular
- Evidence: Entry record with timestamp; no formal certificate
- Best for: Onboarding documents that calculate and then sign
- Watch out for: Basic and Plus exclude signatures entirely
3. WPForms Pro
Signatures arrive in Pro at $199.50 introductory, $399 on renewal, for five sites, alongside save-and-resume, payment processors and Google integrations.
The bundle is the argument rather than the signature itself. If you are buying Pro anyway for payments and save-and-resume, the signature field arrives free with it, and the editor is the one a non-technical colleague will manage without help. If you are buying specifically for signatures, you are paying $199.50 for a field that costs $63 elsewhere, and it is worth knowing that WPForms and WPBeginner share an owner in Awesome Motive, which explains part of why this option appears at the top of most roundups for this query.
- Signature tier: Pro, $199.50 introductory, $399 renewal
- Evidence: Entry record and timestamp
- Best for: Teams already buying Pro for payments and drafts
- Watch out for: Expensive if signatures are the only reason
4. Gravity Forms Elite
The most expensive route to a signature field and the cheapest route to unlimited sites. $259 a year, unlimited sites, with the Signature add-on among the Elite-only extras alongside Partial Entries, Conversational Forms and Salesforce.
The maths flips depending on how many sites you run. For one site, $259 for a signature field is poor value against $63. For an agency putting waivers on fifteen client sites, $259 unlimited with no introductory-to-renewal jump is the cheapest option in this comparison and it comes with the deepest add-on ecosystem in WordPress. Gravity is also the builder most likely to have an existing integration with whatever document or practice-management system you eventually graduate to, which matters if signatures are a stepping stone rather than the destination.
- Signature tier: Elite, $259/yr, unlimited sites, standing price
- Evidence: Entry record; add-on ecosystem for more
- Best for: Agencies deploying signature forms across many sites
- Watch out for: Poor value on a single site
5. A dedicated WordPress e-signature plugin
A different product class that happens to live in the same CMS: plugins built for document signing rather than form building, of which WP E-Signature is the long-standing example.
The distinction is document-centric versus field-centric. A form plugin captures a signature as one field among twenty. A signing plugin manages a document through a lifecycle: sent, viewed, signed, countersigned, completed, with an audit trail recording each step and a stored copy of exactly what was agreed. That lifecycle is what makes a signature defensible, and it is the thing form plugins do not attempt. For contracts, statements of work and anything where a countersignature is needed, this is the correct WordPress-native tool. Verify current pricing and maintenance status before committing, as this is a smaller market than the form-builder one.
- Signature tier: The whole product; confirm current pricing
- Evidence: Document lifecycle and audit trail
- Best for: Contracts and statements of work needing countersignature
- Watch out for: Smaller market; check maintenance before buying
6. DocuSign, Dropbox Sign and the dedicated services
The benchmark, and the right answer whenever the agreement matters enough that a dispute would be expensive. These platforms exist to produce evidence, and they charge accordingly, typically per user per month with envelope limits.
What the money buys is the certificate of completion: a tamper-evident record showing IP address, timestamps, email verification, what the signer saw and when they saw it, plus document hashing that proves nothing changed afterwards. It also buys recognition, since a counterparty’s lawyer knows what a DocuSign certificate is and does not know what your Gravity Forms entry table is. Several integrate with WordPress form plugins, so the practical pattern is a form that collects the details and triggers a signing envelope, which gets you a good user experience and real evidence. Use the plugin for the waiver and the service for the contract.
- Signature tier: Per user per month, with envelope limits
- Evidence: Full certificate of completion and document hashing
- Best for: Anything where a dispute would be costly
- Watch out for: Per-envelope limits catch high-volume users out
Comparison table
| Option | Tier needed | Price | Sites | Audit trail |
|---|---|---|---|---|
| Fluent Forms | Any tier | $63/yr or $279 once | 1 | Basic |
| Formidable Forms | Business | $159.60 intro, $399 regular | 7 | Basic |
| WPForms | Pro | $199.50 intro, $399 renewal | 5 | Basic |
| Gravity Forms | Elite | $259/yr standing | Unlimited | Basic |
| Dedicated signing plugin | The product | Confirm with vendor | Varies | Document lifecycle |
| DocuSign / Dropbox Sign | Per user | Monthly, envelope limits | Not applicable | Full certificate |
What makes a signature defensible
If you are going to use a form plugin for signatures, these are the gaps to close deliberately. Most are free and most are skipped.
- Store what they actually saw. If the terms live on a page you can edit, you cannot later prove which version was agreed. Store the full text with the submission, or store a version number and keep an immutable copy of each version.
- Capture intent explicitly. A separate checkbox stating “I agree to be bound by these terms” alongside the signature is stronger evidence of intent than the drawn line by itself, and costs nothing.
- Verify the email address. A signature from an unverified email proves very little. A confirmation link before or after signing ties the act to a mailbox the signer controls.
- Record timestamp and IP with the entry. Most builders do this; confirm yours does and that the record is retained rather than pruned with old entries.
- Send both parties a copy immediately. A PDF or email delivered at the moment of signing is contemporaneous evidence, and it is the single cheapest improvement available.
- Protect the entries. A signature record in a database that any site administrator can edit is weak evidence. Restrict access, and back up entries somewhere append-only if the agreements matter.
Test the whole flow on a phone before deploying it. Drawn-signature fields are noticeably harder to use on a touchscreen than a mouse, and a waiver that people cannot sign at the door is worse than no waiver at all.
Frequently asked questions
Are form-plugin signatures legally binding?
Electronic signatures are generally valid under ESIGN, UETA and eIDAS. Whether yours survives a challenge depends on the evidence around it, not the plugin. For low-risk waivers that is usually fine; for contracts it usually is not.
What is the cheapest plugin with e-signature?
Fluent Forms at $63 a year or $279 once, because every tier includes every feature. The next cheapest is Formidable Business at $159.60, then WPForms Pro at $199.50.
Do I need DocuSign for a gym waiver?
Almost certainly not. High-volume, low-consequence agreements are exactly where a form plugin is proportionate. Save the per-envelope cost for documents where a dispute would actually hurt.
Can two people sign the same document?
Not straightforwardly in a form plugin, which models one submission by one person. Countersignature and sequential signing are what dedicated signing tools are for, and it is the clearest signal you have outgrown a form.
Where is the signature image stored?
Usually as a file in your uploads directory with a reference in the entry. Check it is not publicly accessible by URL, because a guessable path to signature images is a genuine disclosure problem.
How long should I keep signed forms?
As long as the agreement could be disputed, which for most waivers means the relevant limitation period rather than forever. Set the retention deliberately; signed forms are personal data with a definite shelf life.
The verdict
Split the decision by consequence. Waivers, releases and consent forms belong in a form plugin. Contracts and statements of work belong in a signing service. Trying to make one tool do both is how businesses end up with expensive software and weak evidence.
For the form-plugin half: Fluent Forms at $63 a year, or $279 once. The same field costs $199.50 in WPForms Pro and $259 in Gravity Elite, and for a single site there is no functional difference worth that gap.
If you run many sites: Gravity Forms Elite at $259, unlimited and at a standing price, which inverts the ranking entirely once you pass about four sites.
Then do the three free things. Store the exact terms text with each submission, add an explicit agreement checkbox next to the signature, and email both parties a copy at the moment of signing. Those close most of the evidence gap and cost nothing at all.
