Open Source E-Signature. No Vendor Lock-In.
Use DocuSeal, OpenSign, or Documenso to sign documents on your terms. Opsily handles the servers, backups, and updates. You focus on closing deals.
Why Choose Open Source E-Signature?
Open source esignature tools give you control SaaS can't match. No vendor lock-in. No per-signature fees. No surprise price hikes.
Zero Vendor Lock-In
Your documents live on your server, not someone else's cloud. DocuSeal, OpenSign, and Documenso are fully open source. You own the code, the data, and the infrastructure. Migrate anytime. No export fees. No waiting for API access.
Pay Once, Sign Forever
SaaS charges per signature, per user, per workflow. Open source e-signature tools don't. Deploy DocuSeal for $20/month on Opsily. Sign 10 documents or 10,000. Your cost stays the same. No surprise per-signature fees kicking in mid-quarter.
Opsily Handles the Ops
Open source is powerful, but running it requires server management, SSL certificates, backups, security patches. Opsily automates all of it. You deploy once. We handle uptime, scaling, and updates. Get the control of open source with the reliability of managed hosting.
Built for teams who need reliability
Open Source vs. SaaS E-Signature
See why teams switch from DocuSign, PandaDoc, and SignNow to open source.
Pricing as of May 2026. Open source e-signature tools deployed on Opsily include DocuSeal, OpenSign, and Documenso.
The Open Source E-Signature Tools You Should Know
Five years ago, open source document signing was a niche play. Today, it's a fully-featured category. Here's why it matters.
DocuSeal
DocuSeal is the most popular open source e-signature tool. Deploy it, sign PDF documents, collect signatures online. It's lightweight, batteries-included, and actively developed. GitHub: 40.7K stars. Most teams starting with open source esignature choose DocuSeal.
OpenSign
OpenSign is built for teams that need more. Advanced workflows, role-based signing, audit trails. It's ranked #1 on GitHub for the "open source esignature" keyword. Good for regulated industries (legal, real estate, healthcare).
Documenso
Documenso is VC-backed and polished. It's a DocuSign alternative first, an open source tool second. If your team is used to SaaS e-signature, Documenso's UI will feel familiar. They offer both open source and cloud versions.
Why now?
Three things shifted: (1) SaaS e-signature costs became unbearable ($50-$500/mo per user for enterprise plans). (2) Compliance got stricter (GDPR, HIPAA, SOC 2). (3) Teams realized: we don't need a corporation holding our documents. We need a tool we control.
Open source e-signature tools solve all three.
How It Works
Get open source e-signature running in 3 minutes.
Choose Your App
Select an app to get started.
Choose Your App
Pick DocuSeal, OpenSign, or Documenso. Each solves slightly different problems. Opsily runs them all.
Deploy
Click Install. Opsily sets up SSL, a custom domain, and automatic backups. No terminal commands needed.
Invite Your Team
Add email addresses. They sign in, start using it. That's it.
Sign Contracts
Upload PDFs, send links, collect signatures. Your documents never leave your server.
For Solo Founders
You sign contracts weekly. DocuSign is $40/month. Opsily is $20. You save $240/year and own your data. No per-signature fees. Deploy DocuSeal today.
For Small Teams (5-15 people)
Your team signs NDAs, client agreements, vendor contracts. SaaS costs $50-$200/month for each signature flow. Opsily is $40-$70/month for your whole team. No per-user seats. No per-signature overages.
Simple, Transparent Pricing
Deploy any open source e-signature app on Opsily. No per-signature fees. No per-user seat charges. Just server hosting.
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Enterprise-Grade Security
Your documents are sensitive. We treat them that way.
GDPR Compliant
All data stays in German servers. EU data residency included in every plan. No data scraping. No behavioral tracking.
Encrypted End-to-End
Documents are encrypted at rest. TLS 1.3 in transit. Even Opsily staff cannot access your PDFs.
Daily Backups
Automated encrypted backups every day. 30-day restore window. Never lose a signature.
Security Patches 24/7
Open source tools get security updates fast. Opsily deploys them immediately to all servers.
99.9% Uptime SLA
Your e-signature tool stays live. Redundancy across 3 availability zones. Auto-scaling under load.
Common Questions
Everything you need to know about open source e-signature on Opsily.
Open source e-signature software lets you sign documents digitally without paying per-signature fees. DocuSeal, OpenSign, and Documenso are fully open source. You deploy them on your own server (or Opsily's managed servers) and control the entire signing workflow. Unlike SaaS tools like DocuSign, you own the code and data. No vendor lock-in. No surprise costs.
Stop Paying Per-Signature Fees
Deploy DocuSeal, OpenSign, or Documenso on Opsily today. Get open source e-signature without the ops burden.