BoldSign vs OpenSign
We give BoldSign a 3.0 GPA and OpenSign a 2.6, out of 4.0. BoldSign grades higher on value for money and features. OpenSign grades higher on the free plan. They get the same grade on ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
BoldSign
Low-cost e-signature app and API from Syncfusion
OpenSign
Open-source PDF signing with unlimited free signatures
How we grade them
| 3.0GPABoldSignVery good | 2.6GPAOpenSignGood | |
|---|---|---|
| Value for money | A$15 a month for three on Growth, billed yearly ($5 a head, $15 a head monthly), with 50 envelopes each a month and 10 templates. That's under 60% of this category's cheapest quarter. Unlimited envelopes on Business is $15 a head. | 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. |
| Free plan and trial | BThe free Essential plan gives one user 25 envelopes a month, 2 templates, signer authentication, reminders, branding and the apps. One person could really live on that. Paid plans have a 30-day trial too. | 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. |
| Features | BSigner authentication on every plan, templates, in-person signing and team sharing on Growth, then SSO, AI field detection and HubSpot on Business. Bulk send, SMS, WhatsApp and ID checks cost extra on use, but they're there. It covers the whole job. | 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. |
| Ease of use | CThere's an iPhone app but no store rating on record yet. It's a web app where you upload a contract, place fields and send, with templates to set up first. | 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. |
| Platforms and integrations | BWeb, iPhone and Android, with Salesforce, HubSpot, Zapier, Xero and Power Automate, plus an API on its own plan from $30 a month. No desktop app, so it's a B. | 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. |
| Best for | cheap e-signatures with a generous free plan | unlimited free e-signatures |
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: BoldSign and OpenSign. How we grade
Price against what you get
BoldSign starts at $5 a month for each person and scores 2.7 out of 4 on features, ease of use and platforms. OpenSign starts at $9.99 a month and scores 2.3.
BoldSign scores higher and starts $4.99 a month lower. Of the other e-signature and proposal tools on the chart, none scores higher than BoldSign for less, and 2 score higher than OpenSign 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
- BoldSign starts at $5 per user / month, billed yearly ($15 billed monthly). OpenSign starts at $9.99 per month, billed yearly ($29.99 billed monthly).
- Only BoldSign lists iOS and Android apps.
- OpenSign is open source and self-hostable, according to its own site.
At a glance
| BoldSign | OpenSign | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $5 per user / month, billed yearly ($15 billed monthly) | $9.99 per month, billed yearly ($29.99 billed monthly) |
| Free plan | Essential plan: one user, 25 envelopes a month and 2 templates, with an audit trail, signer authentication, reminders, branding and the mobile apps. | OpenSign Free (cloud): unlimited signatures and templates, signing order, completion certificates, Dropbox import and email notifications. |
| Free trial | 30-day free trial; accounts on public email domains get lower trial limits | None listed |
| Web | ||
| iOS | ||
| Android | ||
| Made by | Syncfusion | OpenSignLabs |
| Price read from | boldsign.com | opensignlabs.com |
| Checked | Oct 17, 2026 | Oct 17, 2026 |
Who each one suits
BoldSign
- Individuals and micro-businesses who send up to 25 documents a month for free
- Teams that want unlimited envelopes at a low per-user price
- Nonprofits: the Growth plan is free for them
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
Worth knowing
BoldSign
- Growth caps each user at 50 envelopes a month and 10 templates; unlimited envelopes need Business.
- Bulk send, bulk links, SMS and WhatsApp delivery, ID verification and the Salesforce integration are add-ons charged on use.
- The API is a separate plan: from $30 a month with 40 envelopes, then $0.75 per envelope.
- Premium shares 250 envelopes a month across all users; going past that is billed pay-as-you-go.
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.
Key features
BoldSign
- Email, SMS or WhatsApp delivery
- Send signing requests by email on every plan; SMS and WhatsApp delivery are paid add-ons from the Business plan.
- Templates and bulk sending
- Save contracts as templates and share them with a team; bulk send from a CSV file and bulk signing links are add-ons.
- Signer verification
- Signer authentication is on every plan; ID with selfie checks, knowledge-based questions and SMS codes can be added on Business.
- AI field detection and search
- Business adds AI that places signature fields on a document and an AI search across signed documents.
- Audit trail
- Each document keeps a downloadable audit trail of its signing history, and the final file is digitally signed to show tampering.
- API and embedded signing
- A free sandbox for testing, then an API plan with embedded sending and signing, webhooks, Zapier, Power Automate and an MCP server.
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.
Plans
BoldSign
Essential$0
One user, 25 envelopes a month and 2 templates, with an audit trail, signer authentication and reminders.
Growth$5
per user / month, billed yearly ($15 billed monthly)
50 envelopes per user a month and 10 templates, with template sharing, in-person signing and team management.
Business$15
per user / month, billed yearly ($25 billed monthly)
Unlimited envelopes and templates, SSO, custom roles, AI field detection and search, HIPAA and the HubSpot integration.
Premium$99
per month for up to 250 envelopes, billed yearly ($138 monthly)
Everything in Business for unlimited users, sharing 250 envelopes a month.
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.
Ways to pay less
BoldSign
- Annual discount
Save 40% with yearly billing
BoldSign's pricing page marks yearly billing as 40% off: Business is $15 per user a month billed yearly against $25 monthly.
- Nonprofit
Free Growth plan and 50% off for nonprofits
Nonprofit organizations get the Growth plan free and 50% off the Business and Premium plans.
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.
