Sign documents in seconds
Send any PDF to your clients for digital signing. No printers, no scanners, no hassle.
No credit card · 3 free documents · Cancel anytime
Three steps to sign
The simplest process to sign documents electronically with legal backing.
01
Upload the PDF
Load the document from your computer and enter the signer's email.
02
Signer receives the link
An automatic email is sent with a unique link and a 4-digit security code.
03
Signed PDF ready
Download the document with the embedded signature and full audit trail.
Everything you need
Firmiu has everything to manage your digital signatures professionally.
Legal backing
Electronic signatures recognized by Latin American e-signature laws for most private contracts.
100% cloud-based
No installations or plugins. Works from any browser and device.
Full audit trail
Records IP, date, time, device and geographic location for every signature.
Automatic delivery
Signer receives the link by email. You get notified when they sign.
Verifiable integrity
Every signed PDF carries a cryptographic signature and its SHA-256 fingerprint. Anyone can check at firmiu.com/verificar that the document was not altered.
Easy to use
Interface designed for accountants, lawyers, and real estate professionals. No learning curve.
Firmiu in action
Thousands of professionals already trust Firmiu
Accountants, lawyers and real estate professionals across Latin America use Firmiu to close deals faster.
+2,400
documents signed
98%
satisfaction rate
< 3 min
average signing time
Simple, transparent pricing
No hidden fees. Cancel anytime. Pick your plan by the volume you need.
Free
To try Firmiu with no commitment
- 3 documents per month
- 1 PDF per send
- Up to 5 signers per document
- Certificate with SHA-256 hash
- Public document verification
- Email support
Essential
For independent professionals
- 30 documents per month
- Up to 5 PDFs per send
- Automatic 48h reminders
- Templates for contracts, letters and receipts
- Contacts, archive and the metrics panel
- Everything in Free
- Priority support
Pro
For growing businesses
- 60 documents a month
- Up to 10 PDFs per send
- Up to 5 signers per document
- Automatic reminders at 48 h
- Templates for contracts, letters and receipts
- Contacts, archive and dashboard with metrics
- Everything in the Essential plan
- Priority support
Enterprise
For payroll and sends that repeat every month
- 2000 documents a month
- Up to 20 PDFs per send
- Bulk sending: hundreds of documents in a single run
- Place the signature once and it applies to all
- A review of the spreadsheet before anything is sent
- Everything in the Pro plan
- Priority support
One send can combine several PDFs into a single document with its certificate. Each PDF uses one slot of your monthly quota.
Why Firmiu over the alternatives
Concrete product facts, not promises.
50 MB
The largest PDF in the market
Firmiu accepts documents up to 50 MB per send. DocuSign stops at 25 MB and Dropbox Sign at 40 MB. A full scanned file fits without splitting it.
SHA-256
An integrity certificate on every document
When the last signer is done, a certificate page is added with the document's SHA-256 fingerprint, its folio, and the date, IP, device and location of each signature.
0
Accounts your client has to create
The signer opens a link, draws or uploads their signature and types a 4-digit code. No sign-up, nothing to install, works on mobile.
Frequently asked questions
Everything you need to know about digital signing with Firmiu.
- Is the digital signature legally valid?
- Electronic signatures are legally recognized in most Latin American countries for most private contracts and agreements, and Firmiu generates an audit trail (IP, date, device and verification code) that backs every signature. Specific validity depends on the country and the document type: some, such as notarized documents or wills, require additional formalities. Firmiu does not provide legal advice.
- Do I need to install any software?
- No. Firmiu works 100% in the browser. No software or plugins need to be installed on your computer or mobile device.
- How does the signer know the document is legitimate?
- The signer receives a 4-digit verification code by email. Only the person with that code can sign the document, guaranteeing its authenticity.
- What if the signer doesn't have a Firmiu account?
- The signer doesn't need to create an account. They receive the unique link by email and sign directly from the browser, without registering.
- How long does it take to sign a document?
- The entire process takes less than 2 minutes: the signer receives the email, opens the link, draws their signature, and enters the verification code.
- Can I sign from a mobile phone?
- Yes. The process is optimized for mobile devices. The signer can draw their signature with their finger directly on the touch screen.
- Where are my documents stored?
- Your documents are stored encrypted on secure servers with AES-256 encryption. Only you and authorized signers can access them.
- Can I try Firmiu for free?
- Yes. The free plan includes 3 documents per month with no credit card required. You can upgrade at any time when you need more capacity.
- In which Latin American countries are electronic signatures recognized?
- Electronic signatures are recognized by the laws of the main Latin American countries, including Mexico, Colombia, Argentina, Chile, Peru, Costa Rica, Guatemala, Ecuador, Honduras, El Salvador, Bolivia, Paraguay, Uruguay, Panama, the Dominican Republic and Nicaragua. The exact scope varies with each country's legislation and the document type; see our legal-validity-by-country guide.
- Does Firmiu comply with data protection regulations?
- Yes. Firmiu complies with the General Data Protection Regulation (GDPR) of the European Union and applicable local data protection laws across Latin America. Your documents are stored with AES-256 encryption, accessible only by you and authorized signers. We do not sell or share your data with third parties.
Ready to simplify your signatures?
Join hundreds of professionals already using Firmiu. No credit card required.