Free electronic signature software: comparison 2026

Looking for free electronic signature software in 2026 is a perfectly legitimate approach: for a small business 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 real 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 limits and how to choose.

Free does not mean low-cost

Important clarification in the preamble: a free plan from a serious publisher (Certyneo, Yousign, DocuSign) is not a legally degraded version. 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 as enforceable as a contract signed on an Enterprise plan at €5,000/month.

Certyneo: the most generous for VSEs

Certyneo offers a free lifetime plan (no trial period): 5 envelopes per month, SES and AES signature with OTP email, 1 user, full API included, full audit trail, unlimited storage of signed documents. No bank card required upon registration, no forced conversion after X days. French publisher, hosting France, GDPR compliant. Ideal for: freelance, small business, self-employed, association which signs less than 5 documents/month.

Yousign: the conditional free plan

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

DocuSign Free Trial: 30 days then switch

DocuSign no longer offers a real permanent free plan — only a 30-day trial with credit card request. At the end, automatic switch to a Personal plan ($10/month) if you forget to cancel. Very practical for a short test, but not a lasting free solution. Highlights during the trial: All Pro features unlocked. Weak points: credit card obligation, risk of accidental changeover, US company subject to the Cloud Act.

Adobe Acrobat: free but not really eIDAS

Adobe Acrobat Reader (free) offers Fill & Sign functions which allow you to add a handwritten signature image to a PDF. Please note: this is NOT an electronic signature within the meaning of eIDAS (no certificate, no audit trail, no certified timestamp). Legally, this is equivalent to pasting a scanned image. Adobe Sign (the real electronic signature solution) starts at $18/month — it's paid, not free. Don't confuse.

Open source alternatives

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

How to choose: decision grid

Choose Certyneo if: you are freelance, small business, French association, volume less than 5 envelopes/month, significant French sovereignty, need an API from free. Choose Yousign if: the QES is necessary for certain acts (paid), you prefer a French actor more established in the media. Choose DocuSign Free Trial if: You need to test all Pro features before purchasing for an enterprise implementation. Avoid Adobe Acrobat Fill & Sign for any document with legal issues.

The pitfalls of free plans

Three traps to avoid. Trap 1: the disguised trial period — some publishers advertise “free” but ask for a credit card and switch after 7 or 30 days. Read the T&Cs. Trap 2: the hidden limitation — 3 envelopes/month which reset to zero on the 1st, not sliding. Pitfall 3: Non-compliance — a “free” solution that does not provide an audit trail has no legal value. Always check that your free plan delivers the signed PDF AND the audit certificate.

When should you switch to paid?

Switch to paid as soon as: you exceed the limits of free (5-10 envelopes/month on a recurring basis), you need reusable models (NDA, standard quote), you want several users (sales + HR + admin), you need branding on the signatory 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 for free today

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