Free electronic signature software: 2026 comparison

Looking for free e-signature software in 2026 is a perfectly legitimate approach: for a start-up micro-business, a freelancer with limited needs, or simply to test a solution before committing a budget. The good news is that the market now offers several genuine freemium options that are compliant eIDAS, with legal validity equivalent to paid plans. Here is the 2026 comparison of the best free e-signature software, their differences, their limitations and how to choose.

Free does not mean low-cost

An important point to note at the outset: a free plan from a reputable provider (Certyneo, Yousign, DocuSign) is not a legally inferior version. It uses exactly the same technology, the same digital certificates, the same audit trail. The difference is quantitative (number of envelopes per month, number of users) or functional (API, integrations, branding), not qualitative. A contract signed on the free plan is just as legally binding as one signed on the Enterprise plan at €5,000 per month.

Certyneo: the most generous option for micro-businesses

Certyneo offers a free lifetime plan (no trial period): 5 envelopes per month, SES and AES signatures with email OTP, 1 user, full API included, comprehensive audit trail, unlimited storage of signed documents. No credit card required upon registration, no forced upgrade after X days. French provider, hosted in France, compliant GDPR. Ideal for: freelancers, micro-businesses, sole traders and associations that sign fewer than 5 documents per month.

Yousign: the conditional free plan

Yousign has historically offered a limited free plan (3 envelopes per month), but its policy is changing: in 2024–2025, a 14-day trial period replaced the permanent freemium model in certain segments. Check the current policy on yousign.com before making your choice. If the freemium option is still available: quality equivalent to Certyneo, with the added benefit of QES access (though this is a paid service). Weaknesses: aggressive pricing changes, uncertainty regarding the long-term availability of the free plan.

DocuSign Free Trial: 30 days, then switch to a paid plan

DocuSign no longer offers a genuine, permanent free plan — only a 30-day trial requiring a credit card. At the end of this period, you’ll be automatically switched to a Personal plan ($10/month) if you forget to cancel. Very handy for a short trial, but not a long-term free solution. Strengths during the trial: all Pro features unlocked. Weaknesses: credit card required, risk of accidental upgrade, US company subject to the Cloud Act.

Adobe Acrobat: free but not strictly eIDAS-compliant

Adobe Acrobat Reader (free) offers ‘Fill & Sign’ features that allow you to add an image of a handwritten signature to a PDF. Please note: this is NOT an electronic signature as defined by eIDAS (no certificate, no audit trail, no certified time stamp). Legally speaking, this is equivalent to pasting a scanned image. Adobe Sign (the genuine electronic signature solution) starts at $18 per month — it is a paid service, 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 free of charge. These are suitable for technical teams capable of installing, maintaining, updating and securing the systems. There are genuine long-term cost savings (no subscription fees), but eIDAS compliance is not automatic: you must configure the TSA yourself, manage the certificates and implement the audit. For a non-technical SME, the freemium SaaS model remains the simpler option.

How to choose: decision matrix

Choose Certyneo if: you are a freelancer, a micro-business or a French association; your volume is less than 5 envelopes per month; French sovereignty is a key priority; you need an API even with the free plan. Choose Yousign if: a qualified electronic signature (QES) is required for certain documents (subject to a fee), or you prefer a French provider with a stronger media presence. Choose the DocuSign Free Trial if: you need to test all Pro features before purchasing for a business 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 providers advertise ‘free’ but require a credit card and switch to a paid plan after 7 or 30 days. Read the terms and conditions. Pitfall 2: the hidden limit — 3 envelopes per month, which reset to zero on the 1st and do not roll over. Pitfall 3: non-compliance — a ‘free’ solution that does not provide an audit trail has no legal value. Always check that your free plan provides both the signed PDF AND the audit certificate.

When should you switch to a paid plan?

Upgrade to a paid plan as soon as: you exceed the free plan limits (5–10 envelopes per month on a recurring basis), you need reusable templates (NDAs, standard quotes), you want multiple users (sales + HR + admin), you need branding on the signing portal (logo, colours), or you’re integrating your CRM/ERP via API with significant volumes. Certyneo’s paid plans start at €9 per month — see /pricing for details.

Frequently Asked Questions

Does pasting an image of a signature onto a PDF count as an electronic signature?

No. The auto-fill functions found in PDF readers simply superimpose an image onto a page: there is no identification process, no detection of subsequent alterations, and no legally binding date. Legally, this is equivalent to a scanned signature. This is the most common – and most costly – misconception, because the visual result is indistinguishable from a genuine signature.

Does a free plan offer the same legal validity?

The value depends on the process used, not the amount paid. A free plan that employs the same mechanism, delivers the signed document and its audit trail, produces exactly the same effect as a costly subscription. There is therefore only one test to carry out: sign a test document and check that you do indeed receive the signed file. and The body of evidence. If the latter is missing, the rest is of little consequence.

Can a self-hosted solution be compliant?

There is nothing to prevent this, but the burden falls entirely on the operator: connection to a time-stamping service, certificate management, tamper-proof logging, and long-term retention. The savings on subscription fees are real; they are offset by the costs of in-house expertise and maintenance. For an organisation without a technical team, the cost-benefit analysis is rarely favourable.

Do the quotas reset to zero every month?

It depends on the terms and conditions, and the difference matters more than it might seem. A calendar-based quota resets on a fixed date, which penalises activities concentrated over a few days; a rolling quota smooths out this constraint. This information is rarely highlighted: it can be found in the terms and conditions, before building a process that depends on it.

What happens if the limit is exceeded during the month?

Sending is blocked until the next billing period or until the user upgrades to a higher-tier plan. The risk is not financial but operational: a contract that cannot be signed on the scheduled day incurs costs that are disproportionate to the price difference between the two plans. It is better to base your planning on peak months rather than the annual average.

Get started for free today

Create a free account at certyneo.com/signup — takes just 30 seconds, no credit card required, 5 envelopes per month for life. To find out more about the differences between SES and AES, see our article (/blog/simple-vs-advanced-signature). For a comprehensive overview of the paid market, see our comparison of the best e-signature solutions for 2026.