Best E-Signature APIs Software - Page 3

DocSpring

DocSpring provides a PDF filling API that makes it easy for programmers to fill out and generate PDF documents.

Average Rating: 4.0/5.0

Total Reviews: 1

Goodflag

Goodflag est prestataire de services de confiance qualifié, fondé en 2005, et spécialisé dans la signature électronique. L’entreprise développe des solutions innovantes permettant de signer, faire signer et cacheter tout type de document, en parfaite conformité avec la réglementation eIDAS. Goodflag s'adresse aux entreprises de toutes tailles et de tous secteur et organisations publiques qui cherchent à optimiser leurs processus de signature et de gestion documentaire. Services clés : - Signature électronique : simplifie et sécurise le processus de signature de documents. - Cachetage électronique : assure l'intégrité et l'authenticité des documents électroniques. Positionnement et forces : - Souveraineté numérique : solutions 100% françaises, assurant une indépendance totale. - Expertise et accompagnement : offres conformes au règlement eIDAS, garantissant la sécurité et la conformité des signatures électroniques. - Interopérabilité : flexibilité d'intégration avec diverses plateformes et services, facilitant ainsi l'adoption de leurs solutions. - Innovant : Goodflag est arrivée en tête du classement des Leaders de l'innovation 2024 (par Les Echos et Statista). En conclusion, Goodflag se positionne comme un acteur clé dans le domaine de la signature électronique, offrant des solutions robustes et conformes aux entreprises et organisations publiques.

Average Rating: 3.5/5.0

Total Reviews: 1

QuickSigner

QuickSigner is an ISO/IEC 27001–certified, web-based electronic signature software solution for businesses that want simple, secure, and genuinely affordable document signing — without usage caps or surprise costs. Unlike traditional e-signature platforms that meter every envelope or signature, QuickSigner includes unlimited document signing on every paid plan. That makes it especially attractive for fast-growing teams, legal departments, HR, sales organizations, and SaaS companies that run high document volumes and need predictable pricing. One of QuickSigner's biggest differentiators is its developer-friendly REST API, priced from just $0.30 per envelope with 50 free credits — a fraction of typical per-envelope market rates, where legacy platforms commonly charge $3–$8 in overage fees. Businesses can embed legally binding e-signatures directly into their own applications and workflows, with a free developer account for unlimited testing before going to production. Every QuickSigner signature is a certificate-based digital signature backed by the Adobe Approved Trust List (AATL) and built on the PAdES standard for Advanced Electronic Signatures. Signed documents are tamper-evident, carry a complete time-stamped audit trail, validate automatically in Adobe Reader, and are legally binding under the US ESIGN Act and UETA, UK law, and EU eIDAS. The platform runs on ISO/IEC 27001:2022-certified infrastructure with encryption in transit and at rest, giving security-conscious teams real peace of mind. Key features include customizable signature fields, reusable contract templates, bulk sending, signing order, reminders, SMS-based signing, and a powerful API for seamless integrations. Users consistently highlight the clean, intuitive interface, which keeps the signing process easy even for non-technical users. Documents go out and come back signed in minutes, cutting turnaround times and operational friction. ## The person your e-signature software forgets Most comparisons of e-signature software are written for the sender — the person who uploads the document and hits "send." Templates, dashboards, integrations, pricing tiers. All useful. But there's a second person in every transaction whose experience almost never gets discussed, and who quietly decides whether the whole thing works: the signer. The signer didn't choose your software. They didn't read the onboarding. They got an email — often on their phone, often while busy — and they have exactly one question: how fast can I make this go away? Everything good or bad about an e-signature tool shows up in that moment. And this is where most evaluations measure the wrong things. A bad tool treats the signer like a user it can recruit. It asks them to create an account before they can sign. It pushes them to download an app. It opens a cluttered interface where it's not obvious what to click, makes them pinch-and-zoom on a phone to find the signature box, or forces them through identity hoops that feel disproportionate to signing a one-page NDA. Every one of those steps is a place where a real person closes the tab. Friction in the signing flow is consistently cited as the biggest barrier to completion — every extra click or confusing step costs you the deal. A signature you don't collect is worth nothing, no matter how powerful the sender-side features were. A good tool is almost invisible to the signer. They click a secure link, the document opens cleanly on whatever device they're holding, the fields they need are obvious and in order, and they're done in under a minute — no account, no install, no token, no friction. Crucially, "easy" and "secure" are not opposites: the best tools quietly capture the audit trail, timestamps, and tamper-evident seal in the background, so the signer gets a frictionless experience and you get a legally defensible document. The signer never has to think about the machinery; the machinery still does its job. So when you evaluate e-signature software, run the one test that actually predicts adoption: send yourself a document and sign it from your phone, as if you'd never seen the tool before. Count the taps. Notice every moment you hesitate. That experience is what you're asking every client, candidate, and counterparty to go through — and it's a better predictor of whether documents actually get signed than any feature checklist. This is the principle QuickSigner is built around. The person signing should be able to do it in seconds — from any device, with no account to create, no app to install, and no certificate token — while the sender still gets Adobe-certified, PAdES-standard signatures, ISO 27001-grade security, and a complete audit trail on every document. The mission is simple: make signing effortless for the people you're asking to sign, without ever compromising on whether it holds up legally. Because the easiest signature to collect is the one that didn't make anyone stop and think. QuickSigner offers a free plan (3 documents/month) with the same legally binding signatures as paid tiers, unlimited-document plans from $5/user/month ($48/year), and a 14-day free trial on every paid plan. Visit QuickSigner.com and start signing smarter, faster, and without limits.

Average Rating: 5.0/5.0

Total Reviews: 2

Signaturit API

With Signaturit’s API we want to help you speed up the adoption of eSignatures and facilitate the integration of our online document signing process into your workflows.

Average Rating: 5.0/5.0

Total Reviews: 1

Certinal e-Sign

Certinal is an enterprise-grade eSignature platform purpose-built for healthcare and other regulated industries. With integrations across 1,040+ applications, it is designed for high-volume, multi-stakeholder environments where every signature transaction requires structured routing, multi-party authorization, signer identity verification, and audit-defensible evidence. Across the care journey, Certinal powers eSignature workflows for: *Patient intake, registration, and financial authorization *Informed consent for procedures — with witness and clinician countersign *Physician sign-offs on discharge summaries, treatment plans, and clinical orders *Telehealth and remote pre-visit document signing *Diagnostics and lab authorization *HIPAA authorizations, privacy notices, and release of information *Clinical trial and research participant agreements Clinical ops, compliance and privacy officers, front office, nursing, HIM, and IT operate within governed templates standardized across multi-facility health systems. Signing is mobile-first and multilingual, meeting patients at the point of care or ahead of arrival. Every transaction generates an evidence pack linking form version, signer identity, timestamps, and complete activity log. Regulatory and compliance coverage spans eIDAS, ESIGN Act, UETA, HIPAA, CMS-0053-F (the 2026 healthcare e-signature mandate), GDPR, DPDP Act, PDPA, PDPL, CFR Part 11, SOC 2, and ISO 27001. Platform mechanisms include tamper-evident sealing, immutable audit trails, cryptographic integrity, signer authentication, exportable evidence packs, and configurable data residency. Beyond healthcare, Certinal serves regulated verticals with equal depth: BFSI: Loan agreements, account opening, insurance policy execution, and KYC signing with multi-signer routing and field-level access controls across compliance, legal, and relationship managers. Aligned to RBI Digital Lending Guidelines mandating IT Act-compliant digital signatures, GLBA for financial data safeguards, DORA for IT risk resilience across the financial sector, and PCI DSS. Legal & real estate: Engagement letters, NDAs, lease agreements, and closing documents with sequential signing, deadline tracking, and dispute-ready evidence packs. ESIGN and UETA require specific handling for electronic equivalents to promissory notes secured by real property, and state-level rules may still require notarization for deed transfers Certinal's audit trails and identity verification support compliance across jurisdictions. Government & public sector: Citizen-facing forms, procurement contracts, and inter-agency approvals — with role-based access, retention policies, and audit trails aligned to public record requirements. Certinal is API-driven and embeds into existing systems — built for enterprise-scale deployment across departments, facilities, and geographies. Request a demo to see how it maps to your workflows.

Average Rating: 4.0/5.0

Total Reviews: 1

Docuten

We transform our clients into “paperless companies” through the digitalisation of their administrative processes. Docuten offers digital signature, electronic invoicing and payments, reducing costs by 50% and offering an implementation rate 2.5 times faster than working with several different providers.

Secure Exchanges

Secure Exchanges is a Canadian cybersecurity company founded to address the growing need for secure digital communications in Canada and internationally. The company develops and operates a cloud platform dedicated to protecting sensitive data exchanges. Its solutions serve businesses, professional firms, financial institutions, government agencies, and healthcare organizations that need to safeguard the confidentiality of their daily communications. The platform is available in English and French. The platform offers three core capabilities: end-to-end encrypted email, secure large file transfer supporting files up to 25 GB, and Adobe AATL-certified digital signatures. All communications are protected by AES 256 encryption and a zero-knowledge architecture, meaning neither Secure Exchanges nor any third party can access exchanged data or encryption keys. The solution integrates directly into Outlook and Gmail as a plugin, requires no IT team for deployment, and allows recipients to receive and reply securely without a license. Secure Exchanges addresses a critical challenge for organizations subject to confidentiality requirements: securing sensitive data exchanges without adding complexity to existing workflows. By integrating into the email tools already in use, the platform eliminates the friction typically associated with encrypted communications. Compliance with Quebec's Law 25 and the European GDPR, combined with SOC 2 Type II certification, enables organizations to meet their regulatory obligations for personal information protection and data security.

SIGNiX

We’re set apart by our Independent e-Signature™ solution, in which the e-signature’s evidence is embedded in the signed document, not linked to an external server, as is the case with many dependent e-signature vendors. This means that the legal evidence behind our Independent e-Signature™ is accessible offline and forever remains with the document, so users have control over their e-signatures and the documents in which these signatures reside. Independent e-Signatures™ also adhere to international, published standards, not private propriety standards – further supporting the perpetual validity of Independent e-Signatures™, as standards in the public domain will always be discoverable, even if they fall into disuse. We also give users complete transparency of the signing process with immediate and complete access to the legal evidence supporting e-signatures’ validity from the first signature on.

Average Rating: 4.0/5.0

Total Reviews: 3

Simplifi

Simplifi is a qualified trust service provider (QTSP) under eIDAS, listed on the EU Trusted List. The platform lets businesses and individuals sign documents with legally binding qualified electronic signatures (QES) - equivalent to handwritten signatures across the EU - entirely remotely, with video identity verification and no hardware token. Teams use Simplifi to send documents for signature, run multi-party signing flows, manage reusable templates, and automate contract workflows. Developers can integrate qualified signatures into their own products via the Simplifi Platform API (REST, OAuth2, OpenAPI 3.1) at no extra API cost. Simplifi holds ISO 27001 and ISO 9001 certifications and serves HR, legal, finance, and sales teams in Romania and across the EU.

Average Rating: 4.5/5.0

Total Reviews: 1