Free electronic signature software: 2026 comparison

Searching for free electronic signature software in 2026 is a perfectly legitimate approach: for a small business starting out, a freelancer with limited needs, or simply to test a solution before committing a budget. Good news, the market now offers several genuine freemium options, compliant with eIDAS, 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 does not mean low-cost

Important clarification at the outset: a free plan from a serious publisher (Certyneo, Yousign, DocuSign) is not a downgraded version in terms of legal standing. 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 a £5000/month Enterprise plan.

Certyneo: the most generous for SMEs

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 once signed. No payment card required at registration, no forced conversion after X days. French publisher, France-based hosting, GDPR compliant. Ideal for: freelancer, SME, self-employed, association 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 the permanent freemium on certain segments. Check yousign.com for current policy before choosing. If freemium still exists: quality equivalent to Certyneo, with added QES access (but paid). Weaknesses: aggressive pricing evolution, uncertainty about the permanence of the free plan.

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. At the end, automatic switchover to a Personal plan (£7/month) if you forget to cancel. Very convenient for a short test, but not a permanent free solution. Strengths during trial: all Pro features unlocked. Weaknesses: payment card required, 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 apply an image of a handwritten signature to a PDF. Be careful: this is NOT an electronic signature in the eIDAS sense (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 £13/month — it is paid, not free. Do not confuse the two.

Open source alternatives

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

How to choose: decision matrix

Choose Certyneo if: you are a freelancer, SME, French association, volume below 5 envelopes/month, French sovereignty important, need API from the free plan. Choose Yousign if: QES is necessary for certain documents (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 implementation. Avoid Adobe Acrobat Fill & Sign for any document with legal implications.

The pitfalls of free plans

Three pitfalls to avoid. Pitfall 1: the disguised trial period — some publishers announce "free" but ask for a payment card and switch after 7 or 30 days. Read the terms and conditions. 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. Always verify 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 free limits (5-10 envelopes/month on a recurring basis), you need reusable templates (NDA, quotation template), you have multiple users (sales + HR + admin), you want branding on the signer portal (logo, colours), or you integrate your CRM/ERP via API with significant volumes. Paid Certyneo plans start at £6/month — see /pricing for details.

Get started free today

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