Bulksign

What Bulksign does

Bulksign is a digital signature and document transaction management software company headquartered in Amsterdam, Netherlands, founded in 2014. The company operates an API-first platform built on .NET 10 supporting Windows and Linux, with database options of MS SQL Server and PostgreSQL (v14+). It exposes SOAP, REST, and gRPC APIs with OpenAPI 3 compatibility and a ready-to-use .NET SDK, enabling developers to integrate digital signature workflows into third-party applications, websites, and back-office systems.

The platform supports serial, concurrent, bulk, embedded, and in-person signing flows, with five signature methods (Click to Sign, Draw or Type, OTP, Local Certificate Token, Stamp) and authentication via SMS OTP, OIDC, SAML, Active Directory, and the in-house Identiflix identity verification product. A documented partner ecosystem spans SendGrid, Sparkpost, Mailjet, Postmark, Twilio, Sinch, Google Maps, HashiCorp Vault, RabbitMQ, and major cloud storage providers; the Bulksign.Extensibility library on NuGet allows customers to replace or extend any core component.

Bulksign monetizes through a tiered model: pay-as-you-go SaaS with envelope-based consumption, a Private Instance option starting at €0.25 per envelope, perpetual on-premise licensing (free for non-profits), and a global partner/reseller program offering prepaid envelopes, per-usage monthly billing, or no-limit annual subscriptions. Distribution is multi-channel: self-serve SaaS signup, partner/reseller network, direct enterprise sales for Private Instance and On-Premise, and API/OEM-style developer integrations. The team is currently sized at 1-10 with active remote hiring across front-end, back-end, and Android engineering.

Name

Bulksign

Legal name

Bulksign

Website

https://bulksign.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

1–10 employees

Short description

Bulksign is an Amsterdam-based digital signature platform offering API-first electronic signature and document workflow management via SaaS, private instance, and on-premise deployments. It serves developers, enterprises, and regulated verticals (legal, financial, healthcare, government) through extensible multi-protocol APIs and a global partner channel.

Ownership category

akta.pro rank

Headquarters

HQ city

Amsterdam

HQ country

Netherlands

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Infrastructure, Marketing or Sales, Operations

Revenue model

1. SaaS Envelope Consumption: Pay-as-you-go billing for the SaaS platform where users pay based on the number of envelopes/consumptions. Users create an account and start sending documents for signing immediately.
2. Partner Prepaid Envelopes: Partners can purchase a fixed number of envelopes at partner pricing, reselling or consuming them internally.
3. Per-Usage Monthly Billing: Monthly billing based on the number of consumed envelopes, offered as a commercial model for partners.
4. No-Limit Annual Subscription: Fixed annual price with no limit on envelopes and users, providing predictable cost for high-volume organizations.
5. Private Instance Pricing: Private instance tailored for specific needs, pricing starts from 0.25 euro per envelope, offering a dedicated environment with consumption-based billing.
6. On-Premise License: Organizations install Bulksign on their own servers, sign documents with no limit and complete control. Free licenses for non-profit organizations.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

Bulksign provides digital signature and document transaction management software enabling electronic signatures and approvals across business workflows. The platform supports multiple signature methods (Click to Sign, Draw/Type, OTP, Local Certificate, Stamp), authentication options (SMS OTP, OIDC, SAML, Active Directory, identity verification), and signing flows (serial, concurrent, bulk, embedded, in-person). It is available as SaaS, Private Instance, or On-Premise deployment, with a multi-protocol API (SOAP, REST, gRPC) and .NET SDK for developer integrations.

Product overview

Bulksign is a digital signature platform offering advanced electronic signatures for business with multiple deployment options (SaaS, Private Instance, On-Premise). The core platform integrates with multiple signature methods (Click to Sign, Draw/Type Signature, OTP, Local Certificate, Stamp), authentication options (SMS OTP, OpenID Connect, SAML, Active Directory), and supports various signing flows (serial, concurrent, bulk, embedded, in-person). The product portfolio includes the main Bulksign Platform, the Bulksign API for developer integrations (SOAP, REST, GRPC with .NET SDK), supporting applications (Bulksign Desktop for document management, Envelope Downloader for batch exports, Certificate Hub for hardware token signing, Bulksign SMS Gateway for OTP delivery), identity verification (Bulksign Identiflix), and user management (Authello). The platform is built on .NET 10 with support for MS SQL Server and PostgreSQL databases, and includes extensibility SDK for customizing core components.

Differentiator

Problem solved

Functional benefit

Brands

• Bulksign Desktop: Desktop application for managing envelopes from desktop. Available for Windows, Linux, and OSX. Version 1.0.5.
• Certificate Hub
• Envelope Downloader
• Bulksign Identiflix
• Bulksign SMS Gateway
• Authello

Products and services

• Bulksign SaaS Cloud-hosted digital signature platform with pay-as-you-go billing. Users create an account and start sending documents for signing immediately without infrastructure management. Includes all signature methods, recipient roles, authentication options, and signing flows.
• Bulksign Private Instance Tailored private instance deployment for organizations requiring dedicated infrastructure with custom SMS and email provider configurations. Pricing starts from 0.25 EUR per envelope.
• Bulksign On-Premise Self-hosted digital signature solution installed on the customer's own servers. Provides unlimited document signing with complete control over data and infrastructure. Free licenses available for non-profit organizations.
• Bulksign API API-first digital signature integration platform supporting SOAP, REST, and gRPC protocols. Compatible with OpenAPI 3 specification with ready-to-use .NET SDK. Enables developers to integrate digital signatures into workflows, websites, or custom applications.
• Bulksign Desktop Native desktop application for creating new drafts and managing envelopes directly from the desktop. Supports Windows (x64 and ARM), Linux (x64 and ARM), and macOS (x64 and ARM64).
• Envelope Downloader Standalone tool for batch downloading completed personal or organization envelopes from the Bulksign service for backup or archival purposes.
• Certificate Hub Desktop application required for signing with digital certificates stored on USB tokens and smart cards. Enables hardware token-based digital signatures for enhanced security.
• Bulksign Identiflix Digital identity verification platform that authenticates signers through ID card, passport, or driving license submission plus selfie. Envelope senders review and accept or reject verification submissions; identification artifacts are added to the audit trail.
• Bulksign SMS Gateway SMS gateway service for delivering one-time passwords (OTP) and signature notifications via SMS to signers. Available as a NuGet integration package.
• Authello User synchronization and identity management platform for single sign-on and automated user provisioning across multiple Bulksign instances for organization members.

Segments12 records

Ideal customer profiles7 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration14 records

AI capability6 records

Feature10 records

Partnerships

15 partnerships are on record, tiered core.

• SendGridcoreTechnology or IntegrationSendGrid email provider is shipped as a default provider for sending notification emails. Available for on-premise and private instance versions.
• SparkpostcoreTechnology or IntegrationSparkpost email provider shipped as a default provider for sending notification emails. Available for on-premise and private instance versions.
• MailjetcoreTechnology or IntegrationMailjet email provider shipped as a default provider for sending notification emails. Available for on-premise and private instance versions.
• PostmarkcoreTechnology or IntegrationPostmark email provider shipped as a default provider for sending notification emails in the SaaS platform.
• TwiliocoreTechnology or IntegrationTwilio is the default SMS provider for sending OTP authentication and signature notifications via SMS. Supports phone number filtering for regional routing.
• SinchcoreTechnology or IntegrationSinch SMS provider integrated for sending OTP authentication and SMS notifications for signers.
• Hashicorp VaultcoreTechnology or IntegrationHashicorp Vault provider retrieves storage encryption key for the storage encryption feature, available for on-premise deployments.
• RabbitMQcoreTechnology or IntegrationRabbitMQ provider for dispatching callbacks and event notifications for on-premise installations, alongside HTTP and named pipes options.
• OpenAIcoreTechnology or IntegrationOpenAI provider for AI-based document summarization. Supports gpt-3.5-turbo and other models for generating document summaries.
• MistralAIcoreTechnology or IntegrationMistralAI provider for AI-based document summarization as an alternative to OpenAI.
• DeepSeek AIcoreTechnology or IntegrationDeepSeek AI provider for AI-based document summarization.
• AnthropiccoreTechnology or IntegrationAnthropic AI provider for AI-based document summarization using Claude models.
• OIDC/SAML Identity ProviderscoreTechnology or IntegrationSupport for external OpenID Connect and SAML authentication providers for signer authentication. Email address must match between Bulksign and the identity provider.
• Identiflix (Bulksign Identity)coreTechnology or IntegrationBulksign's own identity verification platform (Identiflix) for verifying signer identity via ID card/passport selfie and optional SMS OTP. Requires API key from customer portal.
• AuthellocoreTechnology or IntegrationAuthello user synchronization service for managing user authentication across multiple organizations in different Bulksign instances. API key obtained from customer portal.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• DocuSign: Global market leader in electronic signatures and agreement cloud. Direct overlap with Bulksign across API-first eSignature, SaaS, identity verification, and enterprise deployment options; comparable to Bulksign's core functionality at much larger scale.
• Adobe Acrobat Sign: Adobe's enterprise eSignature product, tightly integrated with Acrobat and the Adobe Document Cloud. Competes with Bulksign on API integrations, authentication options, and regulated-industry deployment, with the additional leverage of Adobe's broader document ecosystem.
• Dropbox Sign (HelloSign): Developer-friendly eSignature API acquired by Dropbox, offering a REST API and SDK for embedding signatures into applications. Closely comparable to Bulksign's API-first positioning and SMB-to-enterprise GTM.
• SignNow (airSlate): Mid-market eSignature product within the airSlate business automation platform. Competes with Bulksign on flexible API, multiple signing flows, and embeddable signatures, with broader workflow automation capabilities.
• PandaDoc: Document workflow and eSignature platform combining templates, CPQ, and signature flows. Overlaps with Bulksign on API and signing flows but extends into document generation and approval workflows for SMB/enterprise.
• Zoho Sign: Zoho's electronic signature product, part of the broader Zoho One suite. Comparable API, signing flows, and authentication options to Bulksign, with bundle leverage from the wider Zoho productivity and CRM portfolio.
• SignEasy (now part of eOriginal): Mobile and web eSignature product with strong API for SMB and developer integrations. Overlaps with Bulksign on API-first, multi-device signing, and integrations with cloud storage providers.

Regional players

• YouSign: European (French) eSignature provider focused on the EU market with strong eIDAS-aligned qualified electronic signatures. Overlaps with Bulksign on EU compliance, multi-authentication, and on-premise/private deployment for regulated buyers.

Emerging players

• DocuWare: Document management and workflow platform with built-in eSignature capabilities. Comparable to Bulksign's on-premise deployment story and regulated-vertical positioning, though broader in scope as a DMS.
• Nintex: Workflow and process automation platform with embedded eSignature capabilities (acquired via AssureSign). Comparable to Bulksign in offering API-driven signature integration within broader automation and document workflows.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/Bulksign
• GitHubgithub.com/bulksign
• LinkedInlinkedin.com/company/bulksign
• Facebookfacebook.com/profile.php

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Bulksign