Open Source eSignature for Secure Signing
Award-winning eSignature solution
What open source eSignature means
Open source eSignature is a signing workflow built on software whose source code is available for review, modification, and deployment. In practice, it lets organizations create, send, sign, and store electronic agreements while keeping control over hosting, security, and custom rules. A signer reviews a document, confirms intent, and applies an electronic signature through a browser, mobile device, or app. The system then records the event, attaches timestamps, and preserves evidence for later verification under U.S. electronic signature rules.
Why it matters for U.S. transactions
Open source eSignature can reduce vendor lock-in, support custom compliance workflows, and speed document turnaround. Under ESIGN and UETA, an electronic signature can be enforceable when intent, consent, and record retention are handled correctly.
Common implementation pain points
Identity proofing can be too weak if the workflow relies only on email access or a shared inbox. Audit trails lose value when timestamps, IP data, or signer actions are incomplete or inconsistent. Custom deployments can create security gaps if encryption, access control, and update management are not maintained. Cross-border use becomes harder when U.S. rules, eIDAS tiers, or industry-specific requirements conflict.
Who uses open source eSignature
Real estate
Real estate teams use eSignature for leases, disclosures, and rental applications that move between office and field.
Healthcare
Healthcare organizations use it for intake forms, consent records, and HIPAA workflows that need clear audit evidence.
People who benefit most
Operations leaders at multi-branch real estate firms often need fast lease execution, mobile signing, and document tracking across locations. signNow customer stories from Martin Properties and Optica Ventures reflect this need for simple signing flows that still preserve compliance, speed, and customer convenience across office and field work. NetSuite and ERP administrators in large distributors and manufacturers often need signature workflows tied to order approvals, internal controls, and system data. The Xerox story shows how signNow can fit structured document routing, while Tech Data highlights faster internal and external service through connected approval processes.
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Core features that support signing
Open source eSignature workflows work best when they combine flexibility, traceability, and simple signing steps for both senders and signers.
Reusable workflows
Create reusable signing workflows that keep document steps consistent, reduce manual follow-up, and make review cycles easier to track across teams.
Audit evidence
Capture signer intent with timestamps, audit trails, and document history that support later review and dispute handling.
Mobile signing
Send documents from desktop or mobile so signers can complete agreements without printing, scanning, or mailing.
Templates
Use templates to standardize recurring agreements, reduce setup time, and keep fields aligned across similar documents.
Routing control
Control signer order, required fields, and approval paths so each document follows the right sequence.
Record retention
Keep records organized with searchable storage and exportable logs for internal review, legal requests, or compliance checks.
How the signing flow works
The process follows a simple sequence from document preparation to signed record storage, with each action logged for review.
Prepare: The sender uploads a document and adds fields. Send: The signer receives a secure signing request. Sign: The signer reviews, signs, and confirms intent. Record: The system stores the signed record and audit trail.
Quick setup steps
Use a short setup path to prepare, send, and store signed documents without extra process overhead.
Add document:
Upload the agreement and place signature fields. Set recipients:
Choose recipients and set the signing order. Send request:
Send the request through email or link. Save record:
Review the completed file and store it securely.
Recommended workflow setup
A practical setup balances identity checks, record integrity, and retention rules for U.S. business and regulated workflows.
| Setting | Recommendation |
|---|---|
| Authentication method | SMS OTP with ID review |
| Signature type | SES for routine agreements |
| Audit trail | Enable full event logging |
| Document retention | 6 years for HIPAA records |
| Encryption | TLS 1.2/1.3 and AES-256 |
Platform and system requirements
Open source eSignature workflows run in modern browsers and mobile environments, with secure transport and device access shaping the user experience.
Desktop browsers Chrome, Firefox, Safari, and Edge Desktop OS Windows and macOS Mobile OS iOS and Android
For regulated deployments, managed devices, current browser versions, and controlled access policies matter more than the device brand. signNow workflows are commonly used across Windows, macOS, iOS, and Android environments, with browser-based access supporting desktop and mobile signing.
Security and compliance snapshot
Transport security:
Data encryption:
Security report:
Information security:
Healthcare compliance:
International compliance:
Real-world use cases
Customer stories show how signNow fits practical signing needs in operations, real estate, and system-connected document workflows.
Distribution operations
A distributor needed faster internal approvals without losing control over document routing.
- Tech Data used signNow to improve internal and external service.
- The team kept approval steps aligned with business systems.
The workflow supported faster turnaround while keeping approval paths organized and traceable across teams and customer-facing documents.
Real estate operations
A property business needed online execution for leases and related forms across mobile and office workflows.
- Martin Properties processed documents online with built-in security.
- Mobile and offline access helped keep forms moving.
The result was a more efficient signing process with compliance-focused record handling and fewer delays from paper-based exchange.
Best practices for reliable signing
Reliable signing workflows depend on clear identity checks, consistent templates, and records that stay usable after the signature is complete.
Match authentication to document risk
Standardize recurring document templates
Preserve the full evidence record
Align retention with document rules
Rollout and retention timeline
This timeline combines rollout milestones with retention and policy facts that affect U.S. signing workflows.
Day 1:
Day 2:
Week 1:
7-day trial:
HIPAA retention:
21 CFR Part 11:
UETA adoption:
First month:
Risks of poor implementation
Weak attribution
Incomplete logs
Missing BAA
Part 11 gaps
What the audit trail records
The audit trail captures identity, timing, integrity, and retrieval details that support later review of the signed record.
Signer authentication:
Timestamp capture:
Document hashing:
Tamper-evident sealing:
Audit trail storage:
Audit export:
FAQ and troubleshooting
These answers focus on plan limits, compliance requirements, and workflow details that affect real signing deployments.
signNow Business starts at $8/user/month billed annually, and the 7-day free trial requires no credit card. If you need bulk send, Business Premium adds it, while Enterprise adds advanced signer authentication and integrations. All paid plans include unlimited users.
signNow supports ESIGN and UETA compliance, with audit trails and tamper-evident records that help support enforceability. For HIPAA workflows, a BAA is required, and signed records should be retained for 6 years under 45 CFR §164.530(j)(2).
For HIPAA use, signNow can be used when a BAA is in place and the workflow includes access controls, audit controls, and integrity safeguards. The platform’s compliance posture also includes SOC 2 Type II and ISO 27001, which support broader security review.
The Business plan includes legally binding eSignatures, audit trails, templates, mobile apps, ISO 27001, SOC 2, and GDPR support. If you need SSO, full API access, or phone support, the Site License adds those options and can include HIPAA and 21 CFR Part 11 add-ons.
signNow records signer actions, timestamps, and document history in the audit trail. For FDA-regulated records, 21 CFR Part 11 also expects secure, time-stamped audit trails, unique user identification, and two-component signatures for applicable systems.
signNow’s pricing is public for entry tiers, but enterprise pricing may vary by deployment and add-ons. If you need a comparison for DocuSign, Adobe Sign, PandaDoc, or Dropbox Sign, use verified plan data because feature bundles and transaction limits differ by vendor.
Vendor comparison at a glance
The table below compares core legal and workflow features across leading vendors using publicly available baseline information.
| Recommended | DocuSign | Adobe Sign | PandaDoc |
|---|---|---|---|
| ESIGN and UETA | Yes | Yes | Yes |
| Starting price | $8/user/mo | $15/user/mo | $14/user/mo |
| Free trial | 7-day trial | Trial available | Trial available |
| Audit trail | Yes | Yes | Yes |
| HIPAA support | BAA required | BAA available | BAA available |
Pricing and plan features
Entry pricing and plan features vary by vendor, so the table focuses on verified baseline details and known limits.
| signNow | DocuSign | Adobe Sign | PandaDoc | HelloSign | |
|---|---|---|---|---|---|
| Starting price | $8/user/mo | $15/user/mo | $14/user/mo | $19/user/mo | $15/user/mo |
| Free trial | 7 days | Not verified | Not verified | Not verified | Not verified |
| Bulk send | Business Premium | Not verified | Not verified | Not verified | Not verified |
| Audit trail | Yes | Yes | Yes | Yes | Yes |
| Envelope cap | No cap | 100/user/year | Not verified | Not verified | Not verified |
Key performance indicators that demonstrate SignNow's proven track record.