Legalesign API Alternatives (September 2025)

Legalesign is a powerful eSignature API for developers. Fast, Easy & Scalable API solution for online document signing. Secure & Easy to integrate REST API.

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1.
eSignature API – Secure & Reliable Electronic Signatures
https://eversig
.com/api/

Easily integrate electronic signatures into your apps and workflows with our secure, simple, and fast eSignature REST API. Create a free sandbox today.

2.
UK Based Electronic Signature Software, Online Document Signing & Witnessing, advanced eSignature | Legalesign
https://legalesig
.com/

Legalesign is an esignature software company based in the UK, that provides online document signing, witnessing and advanced eSignature solutions quick and easy.

3.
eSignature - Easy & Secure with BoldSign
https://boldsig
.com/esignature-api/

BoldSign: Fast, reliable eSignature APIs for seamless integration into your app. Easy to use with a free developer sandbox. Start capturing today!

4.
API eSignature integrated into your solutions
https://yousig
.com/api/

Easily integrate electronic signatures into all your tools, or integrate them directly into your application using the Yousign API.

5.
Free Electronic Signature Service - DigiSigner
https://www.digisigne
.com/

Sign documents online using electronic signature. Get legally binding signatures from others. Start with our e-signature solution for free!

6.
Docusign API | Award-Winning, Secure & Scalable APIs
https://www.docusig
.com/products/apis/

The award-winning Docusign API platform is reliable, scalable & secure. Explore the eSignature API, Notary API, Click API, Rooms API & more!

7.
eSignature API from Dropbox Sign (Formerly HelloSign) - Dropbox
https://sign.dropbo
.com/products/dropbox-sign-api/

Dropbox Sign's eSignature API gives you a Quickstart Guide, SDKs, and super clean documentation to get you up and signing in no time. SOC2 and HIPAA compliant esignatures.

8.
API to Extract PDF, Edit & Convert PDF, Create PDF | PDF.co
https://pd
.co/

PDF.co Web API for extracting, editing, converting, merging, and splitting PDF documents. Save time with our powerful tools.

9.
ValidSign eSignatures | Begin met Digitaal Ondertekenen
https://www.validsig
.nl/

Digitale handtekening van ValidSign is dé marktleider voor digitaal ondertekenen. Probeer onze digitale ondertekenoplossing nu gratis en vrijblijvend.

10.
Rocket Lawyer APIs | Elevate your platform. Empower your customers.
https://www.rocketlawye
.com/developers/

From signing to filing, it's never been easier or more affordable to engage customers with API toolkits from the leader in online legal services.

11.
Free Electronic Signature - Xodo Sign (formerly eversign)
https://eversig
.com/

Sign documents online for free. Securely sign contracts, agreements, and forms with legally binding eSignatures from anywhere, on any device with Xodo Sign.

12.
PDF Generation API - Automated Document Generation | DocuGenerate
https://www.docugenerat
.com/

Automatically generate high-quality PDF documents from reusable Word templates and JSON or Excel data with DocuGenerate’s API and web app · Start Generating for Free

13.
Free, Legally Binding Electronic Signatures | Signaturely
https://signaturel
.com/

Upload a document now and get it legally signed in minutes. Signaturely is a free electronic signature software that makes signatures super simple.

14.
Electronic Signature Software - SignWell, Formerly Docsketch
https://www.signwel
.com/

Get your documents signed 40% faster with zero-setup electronic signatures. SignWell helps you cut turnaround time and makes it easy for everyone to electronically sign your documents.

15.
Welcome to Signable | UK Based Electronic Signature Provider
https://www.signable.c
.uk/

Signable's electronic signature software helps you send legally binding and secure online documents in seconds. Start with eSignatures today!

16.
Fast, Easy Website and HTML to PDF Converter via API | PDFShift
https://pdfshif
.io/

An API to convert HTML/CSS documents to PDF. PDFShift is the reliable, Up-to-date and high-fidelity conversion API with no maintenance costs.

18.
Electronic signature - Custom eSignature workflows | airSlate SignNow
https://www.signno
.com/

Sign documents with airSlate SignNow’s legally-binding eSignature trusted by millions. Enjoy a seamless online signature experience anytime, anywhere, on any device.

19.
Jotform Sign: Free E-signature Software
https://www.jotfor
.com/products/sign/

Create, share, and e-sign documents in minutes using Jotform Sign. Automate your workflow with legally binding documents that can be signed anywhere.

21.
Blueink | Secure, Signer-Friendly eSign Solutions at Half the Price
http://bluein
.com/

Choose Blueink for eSignature: 50% less cost than Docusign, HIPAA/GDPR compliant, signer-friendly and premium support. Discover quality and affordability today.

22.
Sign PDF Documents | DocHub
https://www.dochu
.com/

Sign PDF documents online, request eSignatures, and send reusable PDF templates. It's a PDF editor in your browser that integrates with Google and Gmail. Sign up instantly and for free.

23.
e-Sign software: Electronic and digital signatures | Acrobat Sign
https://www.adob
.com/sign.html/

Acrobat Sign helps you e-sign documents, collect digital payments, accept electronic signatures on your website, and more. Start a free trial today.

24.
Secured Signing | Digital Signing and Remote Online Notarization
https://www.securedsignin
.com/

Secured Signing enables businesses to securely sign or notarize documents using PKI Digital Signatures & Remote Online Notarization software

25.
Signeasy | AI-Powered Contract Management for Businesses
https://www.signeas
.com/

Signeasy's AI-powered contract management software simplifies business contracts securely. Prepare, sign, collaborate, and manage contracts with ease.

26.
DreamFactory | Code Automation for Generating REST APIs
https://www.dreamfactor
.com/

Instantly generate APIs from any database with built-in enterprise security controls that operates on-premises, air-gapped, or in the cloud.

27.
SignRequest - Google Workspace Marketplace
https://workspace.googl
.com/marketplace/app/signrequest/411452145109/

SignRequest allows you to sign, manage and store your documents and contracts straight from your Gmail or your other favorite G suite applications. Free. From wherever you are.

28.
Leaflet | Document Automation Software: No programming
https://leafletcor
.com/

Leaflet Platform collaborative document and contract automation and management solution helps in save time by automating complex documents with no programming

29.
eSign Documents with Formstack Sign's Document Signing App
https://www.formstac
.com/products/sign/

Collect digital signatures with an easy-to-use electronic document signing app. Use our digital signature solution to quickly eSign documents on any device!

30.
eSignature Software: Sign PDFs Free Online | Foxit
https://www.foxi
.com/esign-pdf/

Foxit eSign lets you send & receive electronic signatures easier & more securely. eSign & send PDF or Word documents, wherever you are. Try it for free!

31.
Home - QuickSign
https://www.quicksig
.com/

Simple sign-in journeys for everyone.The only European SaaS platform that streamlinescompliant onboarding for financial services, massively.

33.
S-Docs: document automation & e-signature for operational excellence
https://www.sdoc
.com/

S-Docs helps you win faster, accelerate revenue, and drive customer loyalty with intuitive, secure document automation and e-signature solutions.

34.
Abstract: Automate anything with Abstract APIs
https://www.abstractap
.com/

Abstract provides powerful APIs to help you enrich any user experience or automate any workflow. Used by 10,000+ developers worldwide.

35.
PrizmDoc HTML5 Document Viewing & Editing
https://www.accusof
.com/products/prizmdoc/

PrizmDoc: Embed powerful HTML5 document viewing and editing into your application for advanced document processing functionality.

36.
PandaDoc – Create, Approve, Track & eSign Docs 40% Faster
https://www.pandado
.com/

PandaDoc streamlines proposals, quotes & other business document workflows - Trusted by 50K+ Clients - SOC 2, HIPAA & GDPR Compliant!

37.
Electronic Signature, Electronic Notary, Sign Documents Online
http://www.docverif
.com/

Securely sign, store and manage legally binding documents online. Use DocVerify's Electronic Signature Solution to electronically sign or notarize documents from anywhere and anytime.

38.
No Code Automation Platform for Back Office | Legito
https://www.legit
.com/

Trusted by 400k users globally. One integrated no-code solution for Document Automation, Document Lifecycle Management, E-Signature.

39.
Apryse - Document processing technology for developers | Formerly known as PDFTron
https://aprys
.com/

Integrate document processing capabilities into any software applications. Generate, convert, view, edit, and sign pdf and documents easily.

40.
Cryptlex | Software Licensing
https://cryptle
.com/

Easily generate license keys and validate them in your software apps. Additionally, you can offer trials, subscriptions, node-locked licenses, floating licenses, offline licenses and much more.

42.
Custom Esignature | The Worlds First Interactive Email Signature Generator
https://customesignatur
.com/

Custom Esignature is the world's first email signature generator that creates an animated interactive email signature for your brand. Our platform features a centralized dashboard to manage and deploy your signatures with a click, an advanced editor with interactive animated icon sequences, and logo animation that brings your brand to life.

43.
RealEstateAPI
http://www.realestateap
.com/

World’s Most Expressive API for building Disruptive Prop-Tech.

44.
HTML to PDF API | HTML to PNG API - Doppio.sh - Doppio
https://doppi
.sh/

HTML to PDF API : Generate beautiful PDF documents or PNG screenshots with an API and store them directly in your own S3 bucket without compromising privacy with a managed Puppeteer

45.
Create mock APIs in seconds with Mockoon
https://mockoo
.com/

Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.

46.
Zamzar - File Conversion API
https://developers.zamza
.com/

Need an API to convert files from your application? Use Zamzar - 100s of formats supported - Documents, Videos, Images, Audio, CAD, eBooks and more

47.
Shorten.REST - URL Shortener API. Short URL RESTful API. SignUp Free!
https://shorte
.rest/

Get your custom, branded URL Shortener up and running in minutes. Powering communications, commerce, marketing, advertising & more. URL Shortening API.

48.
Fidel API - One API for linking bank cards to applications, globally
https://fidelap
.com/

Power your applications with real-time payment data. Build innovative card-linking applications by connecting Visa, Mastercard and Amex cards to loyalty and marketing services all in one place.

49.
PDF Software & Tools Tailored to Your Business | Foxit
https://developers.foxi
.com/

Foxit Software is the reliable source for fast, affordable, & secure PDF software. From editor to eSign tools and more, we have what your business needs.

50.
Nylas | Powerful Communication APIs
https://www.nyla
.com/

Unlock the power of your communications data. The Nylas communication APIs remove complexity & empower teams to create seamless user experiences.

51.
Contract Lifecycle Management Software | Docusign CLM
https://www.docusig
.com/products/clm/

Docusign CLM streamlines & automates your contract lifecycle management, featuring integrations with Salesforce, NetSuite & more. Accelerate your contracts!

52.
Secure Document Sharing, eSignatures & Analytics - DocSend
https://www.docsen
.com/

Try our secure document sharing platform for free. Instantly know when documents are opened & what pages are read. Easy-to-use eSignatures.

53.
Business Document Management Software Company | ECM Software Company
https://www.square-
.com/

Visit our website to get detailed guides & information on Capture API, Full Administration API Resources, Language Localization & REST API Resources.

55.
Zuplo API Management
https://zupl
.com/

Zuplo is the API management platform for developers. Build, deploy, and scale APIs faster with Zuplo.

56.
Convert any URL or Web Page to PDF. Online HTML to PDF API service.
https://pdfmyur
.com/

PDFmyURL turns Web Pages or complete Sites into PDF with one click. Use our URL / HTML to PDF API in PHP, Java, .NET, Perl, Ruby, Python or JavaScript with our examples!

57.
File Format & Document Solutions for Developers and No-Coders | products.aspose.com
https://products.aspos
.com/total/

Build document manipulation applications using High Code or Low Code APIs, or simply use cross-platform apps to view, compare, inspect or convert 100+ file formats. Explore Aspose, the leading provider of document processing APIs and software solutions.

58.
PDF Editor & eSign Software | Nitro
https://www.gonitr
.com/

Full-featured PDF & eSign solutions for single users, small teams, large businesses and enterprise organizations.

59.
Banking APIs: Wide catalog of financial APIs | BBVA API_Market
https://www.bbvaapimarke
.com/en/banking-apis/

With our banking APIs you can integrate your business with our financial services and make it grow. Find the right API and solution for your business here.

60.
Every Business is an API Business • Apiable
https://www.apiabl
.io/

Simplify API onboarding and consumption with an API Portal that’s purpose-built for API teams to create, secure, market, and monetize API products.

61.
DeveloperHub - Collaborate on Documentation
https://developerhu
.io/

Create powerful beautiful documentation, hassle-free. DeveloperHub is hosted documentation portals service for Product and API Docs. Write your user guides, knowledge base, API and product documentation. Supports Swagger specification, search, collaboration, markdown, mobile devices and SEO. API Documentation as a service.

62.
Terra - Fitness and Health API to connect to your app
https://tryterr
.co/

Health API that enables you to integrate with wearables, such as Garmin, Fitbit, Apple, Google, Polar, Eight Sleep, Oura and Others through a single source

63.
Phone Number, SMS & Identity Verification APIs | Telesign
https://www.telesig
.com/

APIs Delivering Global Verification and Programmable Communications as a service. SMS, Voice, and phone number intelligence solutions. Get started now.

64.
OpenAPI Design & Documentation Management Tool | Stoplight
https://stopligh
.io/

With Stoplight, you can create OpenAPI descriptions, documentation, and mock servers much faster than other API tools — with no specialized knowledge required — all in one centralized platform.

65.
Portant | Automate Your Documents - Easy, Online, Free
https://www.portan
.co/

Portant is the easiest way to automate your documents. Create custom workflows by trying Portant for free. Automate invoices, proposals, contracts with signatures, quotes and more using tools like HubSpot, Google Workspace, Zapier and more

66.
The Professional PDF SDK for Developers
https://www.compd
.com/

ComPDFKit PDF SDK is designed for developers to integrate viewing, editing, annotating, converting, encrypting, and signing, and filling PDFs into any platform.

67.
Letsignit | Best Email Signature Manager for Outlook & Office 365
https://www.letsigni
.io/

Design, manage, and deploy on-brand Outlook email signatures and marketing campaigns for your whole company, all in one secure platform. Microsoft 365, Office 365 & Exchange.

69.
Software Licensing and Distribution API - Keygen
https://keyge
.sh/

Keygen is a powerful software licensing API for desktop apps, on-premise software and other software products written in C++, C#, Swift, Java, Kotlin, Node and more.

70.
Lightning fast email delivery powered by AI | SMTP & Email API
https://mailaz
.com/

Integrate in minutes and send transactional emails via our REST API or SMTP. Scale with our reliable global infrastructure and deliver emails to your customer's inbox instantly.

71.
Design and Deliver Verifiable Certificates | Certopus
https://certopu
.com/

Certopus is the most trusted digital credentials platform to design, generate, store and send verifiable certificates & digital badges right from your fingertips.

72.
Online PDF Editor, Form Filler, and Creator - pdfFiller
https://www.pdffille
.com/

Discover the benefits of a powerful online PDF editor. Create, fill out, share, and collaborate on documents from any device.

73.
Free Online PDF Editor | Edit PDF Files Effortlessly with Foxit
https://www.foxi
.com/pdf-editor/

Foxit's free online PDF editor enables quick PDF editing, eSigning, and redaction with AI-powered tools, offering secure and efficient document management for businesses.

74.
Rally | Legal Management for Businesses & Law Firms
https://www.rallylega
.com/

Complete legal solution for modern businesses and law firms. Automate document workflows and stay organized without lifting a finger.

75.
App per Firma Digitale e Consenso Informato-Confirmo
https://www.confirm
.it/

Il consenso informato e la firma digitale in un’app: scopri le soluzioni di Confirmo, nei settori sanitario, farmaceutico, bancario e assicurativo.

76.
Company Email Signature Software & Marketing | Rocketseed
https://www.rocketsee
.com/

Business email signature management & one-to-one email marketing services. Enjoy consistent email signature branding, insightful reports & 24/7 support.

77.
Automate and streamline 1099 compliance
https://www.withaboun
.com/

A modern API for W-9 collection, TIN verifications, 1099 filings, corrections, and more for federal and state-level compliance.

78.
API Server: Build a REST API from your DB with a few clicks
https://www.cdat
.com/apiserver/

Create a REST API from any database. Hook up any SQL or NoSQL database and the CData API Server instantly generates flexible, comprehensive, & fully documented APIs.

79.
Conga Composer cloud-based document management software | Conga solution
https://cong
.com/products/conga-composer/

Cloud based document generation and management solutions empower sales, legal, and operations to streamline processes and automate document creation and sharing

80.
Corporify | Corporate Housekeeping & Legal Entity Management
https://www.corporif
.com/

Corporify, Digital Legal Entity Management & Corporate Housekeeping. Simplify your legal processes and ensure compliance with our user-friendly platform.

81.
api.video | API to host, manage and deliver videos
https://ap
.video/

api.video lets you quickly and securely deliver on-demand and live-stream videos directly from your website, software, or app.

82.
NetDocuments - Document and Email Management for Legal Firms and Departments
https://www.netdocument
.com/

Save time, money, and frustration! Automate your document and email management with NetDocuments’ secure, compliant, and “anywhere accessible” platform.

84.
Docusign Gen for Salesforce
https://www.docusig
.com/products/gen/

Docusign Gen for Salesforce is one of many industry-leading Docusign products, with 350+ pre-built integrations to accelerate your business. Learn how!

85.
The Best File Uploader & Upload API - Filestack
https://www.filestac
.com/

Add a sleek file uploader to your website with just two lines of code. Upload files from local disk, Dropbox, Instagram, Google Drive, and over 20 integrations

86.
Newoldstamp - Create and manage your email signatures - NEWOLDSTAMP
https://newoldstam
.com/

Generate and manage professional email signatures with Newoldstamp. Customize email signature templates according to your branding.

87.
WorkOS — Your app, Enterprise Ready.
https://worko
.com/

Developer APIs / SDKs for enterprise-ready features like Single Sign-On (SSO/SAML), Passwordless Authentication, Directory Sync (SCIM), Audit Trail (SIEM), and more. Get started for free.

88.
FusionAuth: Auth. Built for Devs, by Devs
https://fusionaut
.io/

The easiest way to add authentication and user management to your application. API-first & purpose-built for developers. Get started for free.

89.
AgentSync: Insurance Compliance Software
https://agentsyn
.io/

AgentSync's insurance compliance software automatically enforces state producer licensing and appointment regulatory requirements. See how our modern insurance compliance solutions can benefit you.

90.
APILayer - Best API Marketplace | Reliable, Scalable APIs | APILayer
https://apilaye
.com/

Explore a highly curated API marketplace focused on reliability, scalability, and quality. Access AI & Machine Learning, Content, Finance, Stock, and more APIs.

91.
Rock-Solid and Award-Winning SMS Gateway | GatewayAPI
https://gatewayap
.com/

Access our top-tier SMS gateway services at an affordable price globally. No subscriptions and full compliance. Create a free account >>

92.
Platform for API Design, Development & Documentation | Apiary
https://apiar
.io/

Apiary provides the leading API-First platform designed specifically to help companies accelerate and control the design, development, and documentation of APIs.

93.
PDF Form Filler | SmartVault
http://docdow
.io/

SmartVault's collaboration tools make it easy to create and share forms, invoices, contracts, and other fillable PDFs with your clients.

94.
Law Practice Management Software | PracticePanther
https://www.practicepanthe
.com/

Learn how PracticePanther's law practice management software can automate your firm processes, billing, time tracking & more. Try it free!

95.
85,000+ US Legal Forms: Get Legal Documents, Contracts & Agreements Online
https://www.uslegalform
.com/

Download or print legal documents, certified by attorneys. Get templates for Real Estate, Business, or personal matters. US Legal Forms – fast and easy way to get legal contracts online.

96.
REST API Documentation Tool | Swagger UI
https://swagge
.io/tools/swagger-ui/

Swagger UI allows development team to visualize and interact with the API’s resources without having any of the implementation logic in place. Learn more.

97.
Powerful Email Signature Generator for Teams - Signature.email
https://signatur
.email/

Create without limits using this powerful drag and drop email signature generator. Compatible with Gmail, Outlook, Apple Mail, iOS and more.

98.
Truto - Unified API Platform & Services
https://trut
.dev/

Build native integrations fast with Truto. Integration is a solved problem. Why have your best engineers work on integrations when they can focus on architecture, design, and product?

99.
Botminds | Capture and Automate Document & Web data
https://www.botmind
.ai/

Botminds AI helps enterprises to Capture, Search, Analyze and Automate Document and Web data. It uses the power of Machine Learning and Natural Language Processing to solve any business problem in a fast, accurate, and automated way