Modusign
Modusign is South Korea's leading cloud-based electronic signature platform, serving 330,000 enterprise members and 10 million users with an estimated 70-71% domestic market share. It offers core e-signature products alongside AI-powered contract lifecycle management and government editions for enterprises and public agencies.
- Company typePrivate
- Founded2015
- HeadquartersHaeundae, South Korea
- Headcount51–100
- GTM typeB2B
- OfferingSoftware
What Modusign does
Modusign is a South Korean cloud-based electronic signature and contract management platform, founded in 2015 in Busan and now headquartered in Seoul. The company serves 330,000 enterprise members and 10 million total users, having processed more than 50 million signatures, and holds an estimated 70-71% share of the domestic e-signature market. Modusign's core product line covers e-signature workflows for individuals, teams, and enterprises, alongside a dedicated government edition, a Salesforce package, and an API for embedded use. The company is currently extending into contract lifecycle management (CLM) with Modusign Form and Modusign Review, and into AI-powered contract operations with the Modusign Cabinet workspace (beta launched May 2025) and an MCP server (released November 2025) that exposes signing and contract APIs to AI agents.
The platform is built on a cloud architecture with integrations to Upstage (OCR), Google Gemini (generative AI), AWS, and Naver Cloud, and processes more than 10,000 pages of OCR daily. Modusign holds a broad set of security and compliance certifications relevant to Korean regulated industries and government work, including ISMS-P, CSAP, ISO 27001, ISO 27017, ISO 27018, ISO 27701, and SOC 2 Type II. Revenue is generated through a tiered subscription model (Personal, Team, Team PRO) with usage-based add-ons, supplemented by a freemium entry tier for individuals and a high-touch enterprise sales motion. Distribution combines product-led growth (KakaoTalk integration, freemium onboarding) with enterprise field sales and an API-first strategy targeting SaaS embedding. The company is led by CEO Lee Young-jun (Young-joon Lee) and has raised approximately $25.4M across six funding rounds, most recently a $12.85M Series C in April 2024.
Modusign firmographics
Firmographics- Name
- Modusign
- Legal name
- 주식회사 모두싸인
- Website
- https://modusign.co.kr
- Company type
- Private
- Founded year
- 2015
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Modusign is South Korea's leading cloud-based electronic signature platform, serving 330,000 enterprise members and 10 million users with an estimated 70-71% domestic market share. It offers core e-signature products alongside AI-powered contract lifecycle management and government editions for enterprises and public agencies.
- Ownership category
- akta.pro rank
Modusign industry classification
Industry- Product category
- Electronic Signature Software
- NAICS
- Document Preparation Services (561410)
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- eSignature, Forms & Digital Workflow Platforms (HDAEAHAJ)
Keywords
Where Modusign is headquartered
LocationHeadquarters
- HQ city
- Haeundae
- HQ country
- South Korea
- HQ region
- Asia
Offices2 records
Markets served
Modusign business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Infrastructure, Operations
Revenue model
- Subscription Plans: Monthly and annual subscription plans (Personal, Team, Team PRO) with tiered document allowances. Annual plans offer 360 documents per tier.
- Usage-Based Add-ons: Usage-based pricing beyond included document quotas, with per-document or credit-based consumption model.
- Freemium Entry Tier: Free entry tier for individual users to drive adoption and conversion to paid plans.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Personal - Individual users with basic e-signature needs |
| Subscription | Annual | Team - Small teams requiring collaborative document signing |
| Subscription | Annual | Team PRO - Professional teams with advanced needs |
Go-to-market motion3 records
Distribution channels4 records
Marketing channels10 records
Modusign product offering
Product offeringCore offering
Modusign provides a cloud-based electronic signature and electronic contract platform that lets organizations prepare documents, request signatures, execute legally binding e-signatures, and manage contracts end-to-end. The service is offered in Enterprise and Government editions, supported by an AI-powered contract management suite (Modusign Cabinet, Modusign Form, Modusign Review), with delivery via web, REST API, MCP server, Salesforce Add-on, and on-premise deployment.
Product overview
Modusign is a South Korean electronic contract platform led by CEO Lee Young-jun, offering a multi-product portfolio centered on its core electronic signature service. The core platform is available in two variants: Modusign Enterprise for private sector businesses and Modusign Government for public institutions. The platform supports multiple delivery methods — web-based service, API integration, on-premise deployment, and a Salesforce Add-on package. Modusign's AI-powered contract management suite (Modusign Cabinet, Modusign Form, and Modusign Review) extends the platform beyond signing into the full Contract Lifecycle Management (CLM) lifecycle, with Cabinet providing AI-based contract digitization, analysis, and deadline tracking using OCR and NLP technologies. All products are built on AWS cloud infrastructure and hold extensive security certifications including ISO 27001 series, ISMS-P, and CSAP.
Differentiator
Problem solved
Functional benefit
Brands
- 모두싸인 캐비닛 (Modusign Cabinet): AI contract management solution that digitizes contracts, extracts key clauses using OCR and NLP technologies, and tracks deadlines
- 모두싸인 기업용 (Modusign Business)
- 모두싸인 공공용 (Modusign Government)
- Modusign Form
- Modusign Review
Products and services
- Modusign Enterprise (모두싸인 기업용) Modusign's primary cloud-based electronic signature platform for businesses, enabling users to send, sign, and manage digital contracts via email or KakaoTalk without requiring signers to create an account. Supports multi-party signing, sequential signing, template management, bulk sending, link-based signing for open groups, embedded signing, and internal approval workflows.
- Modusign Government (모두싸인 공공용) Dedicated version of Modusign tailored for Korean public sector agencies and government institutions, providing electronic signature capabilities that meet public-sector procurement and regulatory requirements such as ISMS-P and CSAP.
- Modusign Cabinet (모두싸인 캐비닛) AI-powered contract lifecycle management solution that integrates and manages both physical and electronic contracts in a single platform. Uploaded contracts are automatically analyzed by AI (OCR + NLP) to extract key clauses, data, and track deadlines. Powered by Google Gemini generative AI and Upstage OCR.
- Modusign Form Contract form/template creation tool announced as part of Modusign's expansion into Contract Lifecycle Management (CLM), enabling users to create and manage reusable contract templates with customizable fields and layouts.
- Modusign Review AI-powered contract review module announced as part of Modusign's CLM expansion, working in conjunction with Modusign Form and Modusign Cabinet to enable systematic legal risk identification and conflict detection in contracts.
- Modusign Salesforce Package Dedicated Salesforce Add-on application package that enables Modusign electronic signature functionality directly within Salesforce CRM workflows, allowing users to initiate and manage contract signing without leaving Salesforce.
- Modusign API HTTP-based REST API enabling developers to programmatically create signature requests, retrieve document information, generate embedded signing links, manage templates, and configure webhooks. Available via API KEY authentication with rate limits and UTF-8 encoding requirements; supports OAuth for third-party integrations.
- Modusign MCP Server Model Context Protocol (MCP) server at developers.modusign.co.kr/mcp enabling AI agents (Cursor, Claude Desktop, Claude Code, Windsurf) to directly access the Modusign API and document data, retrieve document information, and generate signing code automatically.
Quantifiable outcome
- 50 million+ signatures and documents processed
- +3 more outcomes
Companies that use Modusign
Customer profileNamed customers9 records
Segments3 records
Ideal customer profiles4 records
Modusign technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration5 records
AI capability7 records
Feature7 records
Modusign partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered minor and core.
- Law firm SeonunminorStrategic partnership with Law firm Seonun to provide specialized legal expertise for franchise contract risk management and legal compliance support for franchise business customers.
- Upstage (주)업스테이지coreUpstage provides OCR API integration for Modusign Cabinet, enabling automated document scanning and digitization of paper documents into searchable digital format.
- AWScoreAmazon Web Services provides cloud infrastructure for Modusign's platform hosting, with AWS Qualified Software certification indicating technical qualification and compatibility.
- Naver CloudcoreNaver Cloud provides cloud infrastructure services for Modusign's Korean market operations, leveraging local cloud capabilities for optimal performance.
Scale indicators5 records
Recent moves6 records
Expansion highlights6 records
Modusign competitors and assessment
Company assessmentDirect peers
- DocuSign: Global leader in electronic signature and agreement management. Directly comparable product (eSignature), target customer (enterprise legal/procurement teams), and SaaS delivery model; Modusign competes as the dominant Korean local alternative.
- Dropbox Sign (HelloSign): Standalone e-signature SaaS (formerly HelloSign) owned by Dropbox. Closely comparable product category, SMB-and-enterprise customer mix, and API-first approach similar to Modusign's API/embedded distribution.
- Zoho Sign: Zoho's e-signature module tightly integrated into Zoho's productivity and CRM suite. Comparable prepackaged SaaS model and self-serve-plus-enterprise GTM; competes with Modusign in the SMB and mid-market signing segment.
Broad incumbents
- Adobe Acrobat Sign: Adobe's e-signature offering bundled into the broader Document Cloud. Comparable core signing functionality and enterprise/government customer base; broader portfolio and incumbent pricing power versus Modusign's specialized Korean focus.
- OneSpan: Established player in digital signature, identity verification, and fraud prevention for regulated industries. Comparable legally binding e-signature offering and security/identity certification posture; broader regulated-vertical focus versus Modusign's Korean concentration.
- Conga (CLM): Contract lifecycle management and document generation suite with Salesforce-native roots. Comparable CLM and AI contract drafting/review capabilities versus Modusign's Cabinet/Review roadmap; broader enterprise footprint.
Regional players
- KakaoSign (Kakao Corp): Kakao operates electronic signature and certified delivery services within its dominant Korean messaging and identity platform. Comparable Korean e-signature product; different distribution path (leveraging KakaoTalk identity vs. Modusign's standalone SaaS).
- Naver Works: Naver's enterprise groupware and document workflow platform used widely in Korean SMEs and public sector. Comparable Korean enterprise/government customer base and document workflow adjacency; potential bundling threat to Modusign's e-signature and CLM stack.
Emerging players
- PandaDoc: Document workflow and contract management platform with e-signature, templates, and approval workflows. Comparable evolution from e-signature into CLM and overlapping SMB/mid-market customer base; global vs. Modusign's Korean focus.
- Ironclad: Modern AI-enabled contract lifecycle management (CLM) platform targeting in-house legal teams. Comparable trajectory from e-signature-adjacent workflows into AI-powered CLM; represents the category Modusign is moving into with Cabinet/Form/Review.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks5 records
Key highlights7 records
Customer concentration
Modusign social profiles
Digital presenceModusign compliance and trust
Trust signalCompliance6 records
Modusign financial estimates
Financial estimateRevenue estimate
Valuation estimate
Modusign leadership team
Management profileNumber of profiles
Profiles2 records
Modusign funding detail
Funding detailFunding overview
Funding rounds6 records
Investors11 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Modusign M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Modusign
What does Modusign do?
Modusign provides a cloud-based electronic signature and electronic contract platform that lets organizations prepare documents, request signatures, execute legally binding e-signatures, and manage contracts end-to-end. The service is offered in Enterprise and Government editions, supported by an AI-powered contract management suite (Modusign Cabinet, Modusign Form, Modusign Review), with delivery via web, REST API, MCP server, Salesforce Add-on, and on-premise deployment.
Is Modusign a public or private company?
Modusign is a private company. It is classified as venture growth investor backed and is currently operating.
When was Modusign founded?
Modusign was founded in 2015. It employs 51 to 100 people.
Where is Modusign based?
Modusign is headquartered in Haeundae, South Korea, in the Asia region.
How does Modusign make money?
Three revenue lines are on record. Subscription Plans are the primary driver. The others are usage-Based Add-ons and freemium Entry Tier.
Who are Modusign's main competitors?
Direct peers on record are DocuSign, Dropbox Sign (HelloSign) and Zoho Sign. Broad incumbents are Adobe Acrobat Sign, OneSpan and Conga (CLM). Regional players are KakaoSign (Kakao Corp) and Naver Works. Emerging players are PandaDoc and Ironclad.
Does Modusign have an API?
Yes. Modusign API is an HTTP-based interface for signature request management, document information retrieval, embedded signature/link generation, and template management. Available via API KEY authentication through request headers. All API requests require UTF-8 encoding in the request body. Rate limit policies apply. Webhook functionality allows receiving POST requests for Modusign events at user-specified URLs. Supports OAuth for third-party integrations and non-member user integration. MCP (Model Context Protocol) server is available at https://developers.modusign.co.kr/mcp for AI agent integration with Cursor, Claude Desktop, Claude Code, and Windsurf. Developer documentation is at developers.modusign.co.kr.
What industry is Modusign in?
Modusign's product category is Electronic Signature Software. Its primary akta.pro industry code is HDAEAHAJ, eSignature, Forms & Digital Workflow Platforms. Its NAICS code is 561410 and its SIC code is 7372.