Free eSign in India: Aadhaar OTP vs Paid Alternatives

Free eSign exists in India — but the word "free" requires careful reading. Aadhaar OTP-based eSign has a real per-transaction cost, typically borne by the platform, not the end user. Some platforms absorb this cost and offer a free tier. Others pass it on as a per-document charge. Understanding this structure helps you make the right choice for your volume and use case.

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How Aadhaar eSign Is Priced (The Honest Version)

When you sign a document using Aadhaar OTP on any platform, the platform pays UIDAI — via a licensed Application Service Provider (ASP) like eMudhra, NSDL, or Protean — a fee for each authentication event. For a complete explanation of how Aadhaar eSign works, see our full guide. This fee has historically ranged between ₹3 and ₹20 per transaction, depending on the ASP, volume, and contract terms.

This means:

• Aadhaar eSign is never technically free — someone is paying per transaction
• When a platform says "free eSign," it either means they are absorbing the cost up to a certain limit, or the "free" signature is a basic electronic signature (typed/drawn) — not Aadhaar-authenticated
• At scale, the per-transaction cost is the primary variable cost for any eSign platform

This is not a criticism of any platform — it is simply how the infrastructure works. Knowing this helps you understand why truly free, unlimited Aadhaar eSign is not commercially viable for any platform.

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What "Free eSign" Actually Means on Most Platforms

When you see "free eSign" advertised, it typically means one of the following:

1. Free tier with limited documents per month Most platforms offer 3–10 free document signatures per month. This is suitable for occasional personal use — signing a rental agreement twice a year, or a freelance contract once a month.

2. Free basic electronic signature, not Aadhaar eSign A typed name, drawn signature, or image upload is technically free to generate — there is no UIDAI API call involved. These are valid as basic electronic signatures under Section 5 of the IT Act, but do not carry the identity-verified strength of Aadhaar eSign.

3. Free trial / introductory period Some platforms offer 30 days of unlimited signing or a set number of free documents to try the service. After the trial, you move to a paid plan.

4. Free for signers, paid for senders Many platforms charge the person or business sending the document, not the person signing it. From the signer's perspective, it is "free." The sender pays per document or on a subscription.

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Free Tier Comparison (2026)

Platform	Free Aadhaar eSign	Free Limit	Watermark	API Access	Legal Strength
SignSetu	Yes (limited)	Check website	No	No (free tier)	Aadhaar-verified
Adobe Acrobat	No	Unlimited (basic)	No	No	Basic electronic
Smallpdf	No	2/day	Yes (some)	No	Basic electronic
Digio (free tier)	Yes (limited)	~5/month	No	No	Aadhaar-verified
HelloSign / Dropbox Sign	No	3 docs/month	No	No	Basic electronic (US standard)
DocuSign (free)	No	3 docs/month	No	No	Basic electronic

Note: Free tier offerings change frequently. Check each platform's current pricing page before committing.

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When Free eSign Is Enough

Free eSign — whether basic electronic signature or a limited Aadhaar eSign tier — is sufficient when:

You sign infrequently. If you need to sign 2–4 documents a month (a freelance contract, a services agreement, an acknowledgement), a free tier with 5 monthly documents covers your needs.

The counterparty is a known, trusted party. For internal team documents or agreements between parties who have an established relationship, a basic electronic signature is usually sufficient. The risk of a dispute requiring proof of identity is low.

The document has low legal or financial stakes. An informal service agreement for ₹5,000 does not require the same authentication rigour as a ₹50 lakh vendor contract.

You are an individual, not a business. Businesses processing hundreds of documents per month will quickly exhaust any free tier.

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When You Should Pay for eSign

You send documents regularly. At even 20 documents per month, the friction of a free tier (5 per month limit, manual process, no automation) outweighs the cost savings. A paid plan at ₹500–₹2,000/month handles this volume with workflow features.

You need Aadhaar eSign specifically. Free basic electronic signature tools do not provide Aadhaar authentication. For any contract where you may need to prove identity in court or to a regulator, Aadhaar eSign is necessary — and that requires a paid plan or per-document payment.

You are in a regulated industry. Banks, NBFCs, insurance companies, and their vendors operate under RBI and IRDAI guidelines that often require identity-verified signatures. There is no free compliant option for these use cases.

You need API access. Every platform restricts API access to paid plans. If you want to embed signing into your product or automate document workflows, a paid subscription is unavoidable.

You need multi-signer workflows. Free tiers typically support single-signer documents. A standard business contract with two or more parties usually requires a paid plan.

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Cost Comparison: Free Tiers vs Paid Plans in INR

Plan Type	Provider Example	Monthly Cost	Documents Included	Aadhaar eSign	API
Free (basic eSign)	Adobe Acrobat	₹0	Unlimited (basic)	No	No
Free (limited Aadhaar)	SignSetu / Digio	₹0	3–10/month	Yes (limited)	No
Starter paid	SignSetu	₹499–₹999	25–50/month	Yes	No
Business paid	Leegality / SignDesk	₹2,000–₹10,000	100–500/month	Yes	Yes
Enterprise	Leegality / eMudhra	Custom	Unlimited	Yes	Yes
Per-document	Various	₹15–₹60/doc	Pay as you go	Yes	Paid

Costs are approximate and based on publicly available information as of early 2026. Always verify current pricing directly with the provider.

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The Per-Document vs Subscription Decision

For businesses, the choice between per-document pricing and a subscription comes down to volume predictability:

Per-document pricing suits businesses with irregular signing needs — a law firm that processes 5 agreements one month and 40 the next. You pay only when you use the service. At ₹30–₹60 per document, costs are manageable at low volumes.

Subscription pricing suits businesses with consistent, predictable volume. If you are an HR team sending 100 offer letters every month, a flat monthly plan is cheaper and removes the friction of per-transaction billing.

At approximately 20–30 documents per month, most platforms' starter subscription plans become cheaper than per-document pricing.

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Aadhaar eSign Specifically: Who Pays What

To make this concrete: when a landlord uses a platform like SignSetu to send a rental agreement for Aadhaar eSign, and the tenant signs using their Aadhaar OTP:

• The tenant pays nothing
• The platform has paid the ASP (e.g., eMudhra) a per-authentication fee, typically in the ₹3–₹20 range
• The platform recovers this cost either through the per-document fee charged to the landlord, or through the landlord's subscription plan

This is why "free for signers" is a standard model — the business sending documents pays, not the individual signing. For individuals who are the sender (freelancers, landlords, small business owners), a free tier or low-cost per-document plan is the practical starting point.

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Conclusion: Is Free eSign Worth It in India?

Free eSign in India is real but limited. For occasional use — a few documents per month, low-stakes agreements, or basic internal documents — free tiers provide adequate functionality. For anything that requires Aadhaar-authenticated signatures, you will hit free tier limits quickly.

The honest calculus: if you send 10 or more documents per month, or if any of your documents carry legal or financial weight, a paid plan is the right choice. For a comparison of top Aadhaar eSign services and their pricing, see our review. The cost is modest — ₹500 to ₹2,000 per month for most SMB use cases — and the value of an audit-trail-backed, identity-verified signature is worth it.

Free tools are a starting point, not a permanent solution for document signing at any meaningful scale. For a detailed comparison of best document signing platforms, including pricing and features, see our platform guide.