Free electronic signature software: 2026 comparison

Looking for free electronic signature software in 2026 is a perfectly legitimate approach: for a micro-enterprise just starting out, a freelancer with limited needs, 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 provider (Certyneo, Yousign, DocuSign) is not a downgraded version on the legal front. It's 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 at €5,000/month.

Certyneo: the most generous for micro-enterprises

Certyneo offers a free plan for life (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 payment card required at sign-up, no forced conversion after X days. French provider, France-based hosting, GDPR compliant. Ideal for: freelancers, micro-enterprises, self-employed, associations that sign fewer than 5 documents/month.

Yousign: the conditional free plan

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

DocuSign Free Trial: 30 days then switchover

DocuSign no longer offers a true permanent free plan — only a 30-day trial with payment card required. After that, automatic switchover to a Personal plan (US$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: mandatory credit card, risk of accidental switchover, US company subject to the Cloud Act.

Adobe Acrobat: free but not really eIDAS

Adobe Acrobat Reader (free) offers Fill & Sign features that allow you to place a handwritten signature image on a PDF. Warning: this is NOT an electronic signature under eIDAS (no certificate, no audit trail, no certified timestamp). Legally, it's equivalent to pasting a scanned image. Adobe Sign (the real electronic signature solution) starts at US$18/month — it's paid, not free. Don't 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. The cost savings are real in the long term (no subscription), but eIDAS compliance is not automatic: you must configure the TSA yourself, manage certificates, implement audit. For a non-technical SME, SaaS freemium remains simpler.

How to choose: decision framework

Choose Certyneo if: you're a freelancer, micro-enterprise, French association, volume less than 5 envelopes/month, French sovereignty important, need API from free tier. Choose Yousign if: QES is required for certain acts (paid), you prefer a more established French player. Choose DocuSign Free Trial if: you need to test all Pro features before purchase for an enterprise rollout. Avoid Adobe Acrobat Fill & Sign for any document with legal stakes.

Pitfalls of free plans

Three pitfalls to avoid. Pitfall 1: the disguised trial period — some providers advertise "free" but ask for a credit card and switch after 7 or 30 days. Read the Terms of Service. Pitfall 2: hidden limitation — 3 envelopes/month that reset on the 1st, not rolling. Pitfall 3: non-compliance — a "free" solution that doesn't provide an audit trail has no legal value. Always verify that your free plan delivers the signed PDF AND the audit certificate.

When should you upgrade to paid?

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

Get started free today

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