Free Electronic Signature Software: 2026 Comparison

Looking for free electronic signature software in 2026 is a perfectly legitimate approach: for a startup SME with limited needs, a freelancer with modest requirements, or simply to test a solution before committing a budget. Good news—the market today offers several genuine freemium options, eIDAS-compliant, with legal value equivalent to paid plans. Here is the 2026 comparison of the best free electronic signature software, their differences, their limitations, and how to choose.

Free doesn't mean low-cost

Important clarification upfront: a free plan from a reputable publisher (Certyneo, Yousign, DocuSign) is not a legally degraded version. It is exactly the same technology, the same digital certificates, the same audit trail. The difference is quantitative (number of envelopes/month, number of users) or functional (API, integrations, branding), not qualitative. A contract signed on a free plan is just as enforceable as a contract signed on an Enterprise plan costing €5000/month.

Certyneo: The most generous for SMEs

Certyneo offers a free lifetime plan (no trial period): 5 envelopes per month, SES and AES signature with email OTP, 1 user, complete API included, complete audit trail, unlimited document storage. No credit card required at sign-up, no forced conversion after X days. French publisher, France-based hosting, GDPR-compliant. Ideal for: freelancers, SMEs, self-employed professionals, associations signing fewer than 5 documents/month.

Yousign: The conditional free plan

Yousign historically had a limited free plan (3 envelopes/month), but policy is evolving: in 2024-2025, a 14-day trial period has replaced permanent freemium on certain segments. Check yousign.com for current policy before choosing. If freemium still exists: equivalent quality to Certyneo, with QES access in addition (but paid). Weak points: aggressive pricing evolution, uncertainty about free plan longevity.

DocuSign Free Trial: 30 days then conversion

DocuSign no longer offers a true permanent free plan—only a 30-day trial requiring a credit card. Afterward, automatic conversion to a Personal plan (10 $/month) if you forget to cancel. Very convenient for a short test, but not a sustainable free solution. Strengths during trial: all Pro features unlocked. Weaknesses: credit card obligation, risk of accidental conversion, US company subject to Cloud Act.

Adobe Acrobat: Free but not really eIDAS

Adobe Acrobat Reader (free) offers Fill & Sign functions that allow you to place a handwritten signature image on a PDF. Caution: this is NOT an electronic signature under eIDAS (no certificate, no audit trail, no certified timestamp). Legally, it is equivalent to pasting a scanned image. Adobe Sign (the real electronic signature solution) starts at 18 $/month—it is paid, not free. Do not confuse the two.

Open source alternatives

There are a few open source solutions (DocuSeal, OpenSign, SignPDF) that can be self-hosted for free. They suit technical teams who can install, maintain, update, and secure them. Real savings exist long-term (no subscription), but eIDAS compliance is not automatic: you must configure the TSA yourself, manage certificates, implement audit. For non-technical SMEs, SaaS freemium remains simpler.

How to choose: Decision grid

Choose Certyneo if: you are a freelancer, SME, French association, volume under 5 envelopes/month, French sovereignty important, need API from free tier. Choose Yousign if: QES is necessary for certain acts (paid), you prefer an established French player with greater media presence. Choose DocuSign Free Trial if: you must test all Pro features before purchase for enterprise implementation. Avoid Adobe Acrobat Fill & Sign for any document with legal stakes.

Free plan pitfalls

Three pitfalls to avoid. Pitfall 1: disguised trial period—some publishers claim "free" but require a credit card and convert after 7 or 30 days. Read the terms. Pitfall 2: hidden limitation—3 envelopes/month that reset on the 1st, not rolling. Pitfall 3: non-compliance—a "free" solution that does not provide an audit trail has no legal value. Systematically verify that your free plan delivers both the signed PDF AND the audit certificate.

When to switch to paid

Switch to paid when: you exceed free limits (5-10 envelopes/month on a recurring basis), you need reusable templates (NDA, standard quotes), you want multiple users (sales + HR + admin), you need branding on the signer portal (logo, colors), or you integrate your CRM/ERP via API with significant volumes. Certyneo paid plans start at 9 €/month—see /pricing for details.

Start free today

Create a free account at certyneo.com/signup—30 seconds flat, no credit card, 5 envelopes/month for life. To dive deeper into differences between SES and AES, see our article (/blog/signature-simple-vs-avancee). For a full overview of the paid market, see our 2026 best electronic signature solution comparison.