OpenSign vs Zoho Sign
We give OpenSign a 2.6 GPA and Zoho Sign a 3.0, out of 4.0. OpenSign grades higher on the free plan. Zoho Sign grades higher on value for money, features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
OpenSign
Open-source PDF signing with unlimited free signatures
Zoho Sign
Per-user e-signature app from Zoho with a free single-user plan
How we grade them
| 2.6GPAOpenSignGood | 3.0GPAZoho SignVery good | |
|---|---|---|
| Value for money | CTeams is $19.99 a user a month billed yearly ($39.99 monthly), so about $60 a month for three. That's the dearer end of this category, for shared templates and your own storage. The free cloud plan covers 20 documents a month if you can do without sharing; self-hosting doesn't count. | B$30 a month for three on Standard, billed yearly ($10 a head, $12 monthly), with 25 envelopes each a month, so 20 between you is easy. That's inside this category's cheapest quarter. Watch the credits: SMS, ID checks and integrations use them, bought on top. |
| Free plan and trial | AThe free cloud plan has unlimited signatures and templates, 14 field types, signing order and completion certificates, with no cap a normal person would reach. Automatic reminders and the API are the paid bits. | CThe free plan is one user and 5 envelopes a month, with workflows, reminders, the audit trail and the apps. Good for the odd document, not 20 a month. A 14-day trial with no card covers the Enterprise features. |
| Features | CTemplates, signing order, expiry dates, decline, sealed completion certificates, plus API, webhooks, Zapier and embedded signing on paid plans. The gaps: custom branding needs Enterprise, there's no mobile app, and payment requests are still listed as coming soon. | BSigning order, approvals, witnesses, delegated signing, AI field detection and signer checks from Standard, then bulk send, SignForms and payments on Enterprise. It signs with digital certificates too, including your own USB token. It covers the whole job. |
| Ease of use | CNo store rating on record. The cloud version is a web app with templates to set up; hosting it yourself means following the self-host guide and running a server. | B4.8 from about 870 App Store ratings. Very good, but short of the 1,000 ratings we need for an A. |
| Platforms and integrations | BWeb only, with Zapier, Dropbox and Gmail, and an API, webhooks and embedded signing on paid plans. No phone app yet, so it's web with integrations. | AWeb, Mac, Windows, iPhone and Android, the widest spread in this category, with Zoho WorkDrive, Google Drive, OneDrive, Dropbox, Box and WhatsApp Business, plus an API. |
| Best for | unlimited free e-signatures | per-user signing with digital certificates |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: OpenSign and Zoho Sign. How we grade
Price against what you get
OpenSign starts at $9.99 a month and scores 2.3 out of 4 on features, ease of use and platforms. Zoho Sign starts at $10 a month for each person and scores 3.3.
Zoho Sign scores higher, and starts $0.01 a month higher: the question is whether the extra is worth that to you. Of the other e-signature and proposal tools on the chart, 2 score higher than OpenSign for less, and none scores higher than Zoho Sign for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- OpenSign starts at $9.99 per month, billed yearly ($29.99 billed monthly). Zoho Sign starts at $10 per user / month, billed yearly ($12 billed monthly).
- Only Zoho Sign lists macOS, Windows, iOS and Android apps.
- OpenSign is open source and self-hostable, according to its own site.
- Zoho Sign also covers forms.
At a glance
| OpenSign | Zoho Sign | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $9.99 per month, billed yearly ($29.99 billed monthly) | $10 per user / month, billed yearly ($12 billed monthly) |
| Free plan | OpenSign Free (cloud): unlimited signatures and templates, signing order, completion certificates, Dropbox import and email notifications. | One user and 5 envelopes a month, with signature workflows, reminders, an audit trail, cloud storage import and the apps. |
| Free trial | None listed | 14-day free trial, no credit card required |
| Web | ||
| macOS | ||
| Windows | ||
| iOS | ||
| Android | ||
| Made by | OpenSignLabs | Zoho |
| Price read from | opensignlabs.com | zoho.com |
| Checked | Oct 17, 2026 | Oct 17, 2026 |
Who each one suits
OpenSign
- Individuals and small businesses that want unlimited signatures at no cost
- Developers who want to host an open-source signing tool themselves
- Teams that need API sends and webhooks for a low yearly price
Zoho Sign
- Solo users who sign a handful of documents a month for free
- Teams that want unlimited envelopes for a per-user price
- Regulated teams that need digital certificates or 21 CFR Part 11 controls
Worth knowing
OpenSign
- API sends, public links and bulk sending use premium credits: 240 a year on Professional yearly, 100 a month on the monthly plan.
- SSO, custom branding, a custom domain and an uptime SLA come only with Enterprise, priced on request.
- Support for free users is through GitHub issues and Discord; official support comes with the cloud plans.
- Payment requests and a mobile app are listed as coming soon on the Teams plan.
Zoho Sign
- Standard caps each user at 25 envelopes a month; unlimited envelopes start at Professional, $16 per user / month billed yearly.
- SMS delivery, ID checks, timestamping, bulk send and integrations use Zoho Sign credits, bought on top except for Enterprise's 50 per user a month.
- An API plan for developers costs $0.50 per envelope, with no monthly or annual commitment.
- Custom domain and white labelling on Enterprise are only for organizations with 10 or more licensed users.
Key features
OpenSign
- Unlimited free signatures
- Both the free cloud plan and the self-hosted version allow unlimited signatures, requests to others and templates.
- Open source and self-hostable
- The code is on GitHub under the AGPL-3 license and can be installed on your own servers by following the self-host guide.
- Completion certificates
- Signed files are sealed with a certificate, so any later change breaks the signature, and come with a log of access and timestamps.
- Templates and signing order
- Reusable templates, 14 field types, signing order, document expiry and an option for signers to decline.
- API, webhooks and Zapier
- Paid plans add API access, webhooks, a Zapier integration, embedded signing and your own Gmail or SMTP account for emails.
- Premium credits
- Paid plans include credits used for API sends, public signing links, bulk sends and kiosk-mode signing in person.
Zoho Sign
- Signature and approval workflows
- Set a signing order with reminders and an audit trail; paid plans add approver and manager steps, witnesses and delegated signing.
- Digital signature certificates
- Sign with Zoho's cloud certificate on every plan, or from Standard with your own USB token or PFX file and trusted providers.
- Automatic field placement
- AI-based detection and text tags add signer fields to a document, and a Zia AI assistant is included from Standard.
- SignForms and bulk send
- Enterprise turns templates into public signing forms, sends one document to many recipients and collects payment through Zoho Checkout.
- Signer verification
- From Standard, check signers by one-time password, government ID, knowledge-based questions or Stripe Identity, paid for in credits.
- Apps and cloud storage
- Apps for iOS, iPadOS, Android, macOS and Windows, with import and export to Zoho WorkDrive, OneDrive, Google Drive, Dropbox and Box.
Plans
OpenSign
OpenSign Free$0
Hosted: unlimited digital signatures and templates, 14 field types, signing order, completion certificates and public profiles.
OpenSign Professional$9.99
per month, billed yearly ($29.99 billed monthly)
Field validations, webhooks, Zapier, API access, auto reminders, embedded signing and 240 premium credits a year.
OpenSign Teams$19.99
per user / month, billed yearly ($39.99 billed monthly)
Adds teams and organizations, shared templates, your own cloud storage and 500 premium credits a year.
OpenSign EnterpriseCustom
Price on request: custom domain, custom branding, an uptime SLA, SSO and priority support.
OpenSign Self-Hosted$0
The open-source version you host yourself from GitHub, with unlimited signatures and templates.
Teams (self-hosted)$720
per year for up to 3 users, self-hosted
Paid self-hosted license with 1,500 premium credits, API access, embedded signing, public links, kiosk mode and analytics.
Zoho Sign
Free$0
Single user and 5 envelopes a month, with signature workflows, reminders, audit trail and Zoho's cloud signing certificate.
Standard$10
per user / month, billed yearly ($12 billed monthly)
25 envelopes per user a month, approval workflows, delegate and witness signing, AI field detection and app integrations.
Professional$16
per user / month, billed yearly ($20 billed monthly)
Unlimited envelopes and templates, branding, signer attachments, multi-language signing and reports.
Enterprise$22
per user / month, billed yearly ($28 billed monthly)
Adds bulk send, SignForms, in-person signing, conditional fields, payment collection, QES, APIs and 50 credits per user a month.
CustomCustom
Sold through sales for high-volume automated workflows, with custom envelope limits and user counts.
Ways to pay less
OpenSign
- Annual discount
Lower price with yearly billing
Professional is $9.99 a month billed yearly against $29.99 monthly, and Teams $19.99 per user a month yearly against $39.99 monthly.
Zoho Sign
- Annual discount
Save 20% with yearly billing
Zoho Sign's pricing page offers 20% off for yearly billing: Standard is $10 per user a month billed yearly against $12 monthly.
