SignChain, XiTrust MOXIS, and Verdocs are eSignature platforms built for three different deployment models: Verdocs is the strongest choice for development teams embedding signing into their own applications, with 60+ native web components, open-source MIT SDKs, and a free tier with 25 envelopes per month requiring no credit card. SignChain uses blockchain technology to create cryptographically hashed, immutable on-chain document records for organizations requiring trustless, decentralized verification. XiTrust MOXIS is purpose-built for Qualified Electronic Signatures under eIDAS, serving European enterprises in banking, government, and regulated industries.
The best eSignature platform for embedding signing into your own application is Verdocs. Among these three, it is the most developer-centric option, delivering 60+ native web components, full CSS white-labeling, open-source MIT SDKs, and API access on every plan including the free tier. The best option for organizations with a blockchain verification mandate is SignChain, which anchors each signature event as a cryptographic hash on a distributed ledger for trustless, independent verification. The best choice for European enterprises with eIDAS Qualified Electronic Signature obligations is XiTrust MOXIS, which integrates directly with multiple EU-accredited trust service providers and supports qualified company seals.
Based on our analysis of all three platforms across features, pricing, developer capabilities, and compliance requirements, the decision comes down to your deployment model. This comparison covers each platform in depth so you can match the right tool to your specific workflow.
Key Takeaways
Here are the most important differences between SignChain, XiTrust, and Verdocs based on our evaluation of features, pricing, and compliance certifications:
- Verdocs is the most developer-centric option of the three, delivering 60+ native web components with full CSS control, open-source MIT SDKs, and API access on every plan including the free tier — with no credit card required to start.
- XiTrust MOXIS is purpose-built for eIDAS Qualified Electronic Signatures, with native integration across multiple EU-accredited trust service providers and company seal support for high-volume regulated document issuance.
- SignChain brings a blockchain-first approach, writing each signature event as a cryptographic hash to a distributed ledger for trustless, on-chain document verification independent of any central authority.
- Verdocs offers a self-serve free tier with 25 envelopes per month and no credit card required. SignChain also offers a limited free plan. XiTrust pricing is typically quote and demo-led.
- Verdocs maintains SOC 2 Type 1 certification with 2048-bit RSA encryption, modular HSM integration, and PKI digital certificates, addressing regulated verticals including fintech, insurance, legal, and real estate.
- All three platforms target distinct compliance architectures: Verdocs for embedded developer workflows globally, SignChain for trustless on-chain verification, and XiTrust MOXIS for EU eIDAS QES obligations.
Why Teams Evaluate SignChain, XiTrust, and Verdocs
Development teams and enterprise buyers rarely evaluate these three platforms together in a standard eSignature RFP. Each solves a distinct requirement that mainstream tools do not address.
For development teams building SaaS products or enterprise applications, the central issue is embedding depth. Iframe-based signing solutions render a third-party UI inside your application, constraining CSS control to what the vendor permits and creating friction when users encounter a mismatched visual experience mid-workflow. Verdocs enters the conversation when product and engineering teams need signing to live natively inside their application’s DOM, with full brand control and no third-party portal redirect.
For organizations with blockchain verification mandates, the question is one of trust architecture. Standard commercial eSignature platforms maintain audit logs on their own infrastructure, which means verifying that audit trail requires trusting the platform’s own attestation. SignChain’s blockchain-anchored approach makes that trust unnecessary. For supply chain compliance frameworks, cross-border contracts between counterparties with no shared trust authority, and intellectual property registration workflows where neutral ledger timestamps carry legal weight, SignChain addresses a requirement centralized platforms cannot meet by design.
For European enterprises with eIDAS QES obligations, the evaluation centers on signature level and trust service provider access rather than developer features. In the EU, Qualified Electronic Signatures carry the same legal weight as a handwritten signature across all member states. Standard eSignature platforms support Simple or Advanced Electronic Signatures but not native QES with EU-accredited trust service providers. XiTrust MOXIS was purpose-built for this specific compliance requirement.
Quick Product Overview
Verdocs
Verdocs is an API-first eSignature platform built for developers and product teams. The platform’s defining feature is its library of 60+ native web components, built with standards-compliant web technology rather than iframes. Development teams get full CSS control over the signing experience without sacrificing legal validity or compliance.
Verdocs maintains SOC 2 Type 1 certification and uses 2048-bit RSA encryption with modular HSM integration and PKI digital certificates. Its open-source SDK (MIT license) covers the major frontend frameworks. The free developer tier lets teams start building immediately with no credit card required.
Verdocs serves fintech, insurance, legal, real estate, and accounting teams. It is the first fully embeddable, end-to-end eSignature solution certified for Microsoft Commercial Cloud, including SharePoint, Teams, Dynamics 365, and Power Platform.
SignChain
SignChain is a blockchain-based electronic signature platform that uses distributed ledger technology to generate cryptographically hashed, immutable records of signed documents. Each signature event is written on-chain, creating an audit trail that is independently verifiable without relying on SignChain as a central authority. SignChain targets organizations with a specific requirement for trustless, decentralized document verification: supply chain compliance, cross-border contracts, and intellectual property registration workflows where on-chain provability is a primary requirement.
SignChain publishes its pricing publicly, including a limited free plan and paid tiers. Teams can evaluate the platform without a sales conversation before committing to a paid tier.
XiTrust MOXIS
XiTrust MOXIS is a European electronic signature platform purpose-built for Qualified Electronic Signatures under eIDAS. Founded and headquartered in Graz, Austria, XiTrust operates locations across Germany, Austria, and Switzerland and serves 100+ enterprise customers including BMW, voestalpine, Fresenius Kabi, KTM, and The Adecco Group.
MOXIS integrates with multiple EU-accredited trust service providers, supporting QES, Advanced Electronic Signatures (AES), and Simple Electronic Signatures (SES) from a single platform. MOXIS also supports qualified company seals for organizations issuing large volumes of regulated documents. Its primary audience is enterprises in Germany, Austria, and across the EU where financial institutions, government agencies, and regulated service providers require QES as a legal or compliance obligation.
Feature-by-Feature Comparison
Verdocs leads on developer flexibility and embedding depth. SignChain leads on trustless, blockchain-anchored document verification. XiTrust MOXIS leads on eIDAS QES compliance and EU-accredited trust service provider integration.
Core architecture
- Verdocs: API-first embeddable platform
- SignChain: Blockchain-anchored signature verification
- XiTrust MOXIS: European QES compliance platform
Native web components
- Verdocs: 60+ web components
- SignChain: Not available
- XiTrust MOXIS: Not available
Embedding approach
- Verdocs: Native web components (no iframes)
- SignChain: REST API integration
- XiTrust MOXIS: REST API integration
White-label and CSS control
- Verdocs: Full white-label, complete CSS control
- SignChain: Not available
- XiTrust MOXIS: Not available
Open-source SDKs
- Verdocs: MIT license (React, Angular, Vue, Node.js, vanilla JS)
- SignChain: Not available
- XiTrust MOXIS: Not available
Free tier
- Verdocs: 25 envelopes/month, no credit card required
- SignChain: Limited free plan (publicly listed)
- XiTrust MOXIS: Contact required
Self-serve access
- Verdocs: Yes, start immediately
- SignChain: Yes (public pricing and free plan)
- XiTrust MOXIS: Demo and sales engagement required
eIDAS QES
- Verdocs: Via partner integrations (AES native)
- SignChain: Not available
- XiTrust MOXIS: Yes, core feature
Blockchain verification
- Verdocs: Not available
- SignChain: Yes, core feature
- XiTrust MOXIS: Not available
Company seals
- Verdocs: Not available
- SignChain: Not available
- XiTrust MOXIS: Yes, qualified company seals
Signing modes
- Verdocs: Click-to-sign, draw, typed, image upload
- SignChain: Blockchain-anchored signature
- XiTrust MOXIS: QES, AES, SES
Authentication options
- Verdocs: KBA, SMS, PIN, in-person
- SignChain: Cryptographic key pair
- XiTrust MOXIS: EU trust service provider identity
Audit trail
- Verdocs: Full (PKI certificates, modular HSM integration)
- SignChain: Blockchain-immutable on-chain ledger
- XiTrust MOXIS: Full (eIDAS-compliant)
Security certification
- Verdocs: SOC 2 Type 1
- SignChain: Not published
- XiTrust MOXIS: Not published
Encryption
- Verdocs: 2048-bit RSA, modular HSM integration, PKI certificates
- SignChain: Cryptographic hash (blockchain)
- XiTrust MOXIS: EU-standard encryption
Microsoft Cloud certification
- Verdocs: SharePoint, Teams, Dynamics 365, Power Platform
- SignChain: Not available
- XiTrust MOXIS: Not available
Primary market
- Verdocs: Global (developer-focused)
- SignChain: Cross-border and supply chain
- XiTrust MOXIS: Germany, Austria, and EU enterprises
Pricing Comparison
Verdocs is the only platform with a full self-serve free tier requiring no credit card and no sales conversation. SignChain publishes pricing and includes a limited free plan. XiTrust MOXIS pricing requires a demo and sales engagement.
Verdocs
- Free tier: 25 envelopes/month, no credit card required
- Starting price: $0/month
- Pro: Custom volume-based pricing, no per-user fees
- Platform/ISV: Custom pricing for white-label resale
- API access on free plan: Full API and SDK access
- Minimum users: None
SignChain
- Free plan: Limited (2 documents, 2 recipients per document)
- Paid tiers: Publicly listed
- Enterprise: Contact for custom pricing
- API access: Available on paid tiers
XiTrust MOXIS
- Free tier: Not available
- Pricing: Contact and demo required
- Enterprise: Custom quote
- Self-serve access: Not available
Verdocs Pricing
Verdocs offers a free developer tier that includes 25 envelopes per month with no credit card required, making it genuinely accessible for developers who want to build and test before committing. Full API and SDK access is included at every tier, so development teams never need to escalate to an enterprise contract to start building. Custom Pro and Platform tiers cover unlimited envelopes, dedicated support, and white-label resale for ISVs and platform builders.
SignChain Pricing
SignChain publishes its pricing publicly and includes a limited free plan covering 2 documents and 2 recipients per document. Paid tiers are available for higher volume requirements. Engineering teams evaluating SignChain can review public pricing without a sales conversation before committing to a paid plan.
XiTrust MOXIS Pricing
XiTrust MOXIS pricing requires a demo and sales engagement before details are disclosed. No publicly listed tiers or self-serve access are available. The platform is designed for enterprise procurement cycles typical of regulated European industries. Teams evaluating XiTrust MOXIS should plan for a sales-led evaluation process.
1. Verdocs: API-First Embeddable eSignature
Verdocs is built around one architecture decision that separates it from every other platform in this comparison: native web components instead of iframes. Iframe-based portals constrain what developers can control; styling is limited to what the vendor permits, cross-origin security restrictions apply, and accessibility handling becomes more complex.
Verdocs’ 60+ native web components are built on standard browser technology. Teams apply unrestricted CSS, integrate with any frontend framework (React, Angular, Vue, vanilla JS, TypeScript), and match their product’s design system exactly, with no vendor UI bleeding through. Users sign documents without leaving your application.
The open-source MIT-licensed SDK extends that flexibility further. Engineers can inspect, fork, and extend the platform’s frontend tooling without vendor lock-in. JavaScript and TypeScript SDKs are published on GitHub and npm, with framework wrappers for React, Angular, and Vue that reduce integration from days to hours. The isomorphic JS SDK runs in both browser and Node.js environments, enabling server-side signing flows alongside client-side rendering. A proof-of-concept is deployable within hours.
Verdocs maintains SOC 2 Type 1 certification with 2048-bit RSA encryption, modular HSM integration for bring-your-own signing certificates, and PKI digital certificates, satisfying the compliance requirements of regulated verticals globally. Verdocs is the first fully embeddable eSignature solution certified for Microsoft Commercial Cloud, covering SharePoint, Teams, Dynamics 365, and Power Platform.
Customer implementations include MRP Realty (efficiency and client experience improvements), Appcom (mobile application with embedded signing), and Foundations (streamlined HR operations). The free tier with full API access makes it low-risk to evaluate before committing.
Key Features
Developer tooling:
- 60+ native web components: React, Angular, Vue, vanilla JS, and TypeScript wrappers; full CSS control; renders inside your app’s DOM, not iframes
- Open-source MIT SDKs: Published on GitHub and npm; inspectable, forkable, TypeScript-typed; security teams can audit every line before shipping to production
- Isomorphic JS SDK: Runs in both browser and Node.js; enables server-side signing flows alongside client-side rendering
- REST API with webhooks: Template management, status updates, full document lifecycle management; authenticate and start building without a sales conversation
Security and compliance:
- SOC 2 Type 1 certification, meeting enterprise compliance for fintech, insurance, legal, real estate, and accounting
- 2048-bit RSA encryption with modular HSM integration (bring-your-own signing certificates) and PKI digital certificates
- Microsoft Commercial Cloud certification: SharePoint, Teams, Dynamics 365, Power Platform (first fully embeddable eSignature)
- AWS and Azure dual-cloud infrastructure: High availability and geographic redundancy
Customization and UX:
- Full white-label ownership: Customize email templates, signing UI, and document certificates with no Verdocs branding visible
- Authentication options: KBA, SMS, PIN codes, in-person link generation
- Platform/ISV pricing: White-label eSignature resale for independent software vendors, unique in the market
- Full document lifecycle: Template creation, role-based routing, conditional field logic, signing room orchestration, audit trail generation, and archival
Best For
Verdocs is the right choice for development and product teams who need to embed a complete, white-labeled eSignature experience directly into their application. This includes SaaS platforms building signing as a native product feature, enterprises deploying on Microsoft Commercial Cloud, fintech and insurance platforms where compliance documentation is part of enterprise procurement, and engineering teams who want open-source SDKs they can inspect and extend.
Pricing
- Basic (Free): $0/month, 25 envelopes/month, no credit card required, full API access
- Pro: Custom pricing, unlimited envelopes, dedicated support, no per-user fees
- Platform/ISV: Custom pricing, unlimited envelopes, full white-label resale rights
2. SignChain: Blockchain-Anchored Document Verification
SignChain’s electronic signature model is architecturally distinct from both Verdocs and XiTrust MOXIS. Rather than storing audit logs on centralized servers, SignChain writes each signature event to a distributed ledger as a cryptographic hash. This hash is the fingerprint of the signed document at the moment of signing; if a single character changes after signing, the hash no longer matches the on-chain record.
SignChain publishes its pricing publicly, including a limited free plan covering 2 documents and 2 recipients per document. This allows engineering teams to evaluate the platform and test its blockchain verification model without a sales conversation.
The trustless verification model addresses a specific gap. Traditional eSignature platforms maintain audit trails on their own infrastructure, which means verifying that audit trail requires trusting the platform’s own attestation. Any party with the document and the on-chain hash can confirm authenticity against the blockchain record without asking SignChain to confirm it. For organizations operating in regulatory environments that specifically mandate decentralized verification, or for cross-border contracts between counterparties who share no common trusted authority, this model addresses a requirement that no centralized eSignature platform can meet by design.
Key Features
Verification and trust:
- Blockchain-immutable audit trail: Cryptographic hash written to a distributed ledger at the moment of signing; verifiable by any party without vendor dependency
- Trustless verification model: Document integrity confirmable without relying on SignChain’s own infrastructure or attestation
- On-chain tamper detection: Hash mismatch surfaces if document content is altered after signing
- Persistent record: On-chain record survives platform migrations, corporate events, and SaaS contract expirations
Integration and deployment:
- REST API: Integration into existing document workflows
- Public pricing: Free plan and paid tiers publicly listed; no sales conversation required to evaluate
- Blockchain-native architecture: Designed for use cases where decentralized provenance matters more than embedded UI components or white-label control
Best For
SignChain is suited for organizations with an explicit blockchain verification mandate: supply chain compliance frameworks requiring on-chain attestation of supplier agreements, cross-border contracts between parties in jurisdictions with no shared trust authority, and intellectual property registration workflows where neutral ledger timestamps carry legal weight. It is not designed for teams that need embedded signing inside their own application, white-label UI control, or EU eIDAS QES compliance.
Pricing
SignChain publishes its pricing publicly. A limited free plan is available covering 2 documents and 2 recipients per document. Paid tiers are listed for higher volume requirements. Enterprise pricing is available via contact. Teams can review all public tiers and evaluate the platform without a sales conversation.
3. XiTrust MOXIS: European QES Compliance Platform
XiTrust MOXIS operates at the intersection of regulatory compliance and enterprise signing infrastructure. Under eIDAS, Qualified Electronic Signatures carry the same legal weight as a handwritten signature across all EU member states. MOXIS enables organizations to issue QES at scale by integrating directly with multiple EU-accredited trust service providers, removing the need to build individual TSP integrations per member state.
MOXIS supports all three eIDAS signature levels from a single platform: Simple Electronic Signature (SES), Advanced Electronic Signature (AES), and Qualified Electronic Signature (QES). Organizations select the appropriate level per document type within a single deployment. For organizations issuing contracts, certificates, or regulatory documents at high volume, qualified company seals provide organizational-level QES as distinct from individual signer QES, enabling bulk sealing workflows that reduce manual overhead.
Founded in Graz, Austria, XiTrust serves 100+ enterprise customers including BMW, voestalpine, Fresenius Kabi, KTM, and The Adecco Group, with offices across Germany, Austria, and Switzerland. Under the EU Digital Identity Wallet framework, each Member State must make at least one wallet available by the end of 2026, enabling citizens to prove identity and support signing use cases, which expands the addressable user base for QES platforms.
Key Features
Compliance and identity:
- eIDAS QES, AES, and SES: All three eIDAS signature levels from a single platform deployment
- Multiple EU-accredited trust service provider integrations: QES without building individual TSP integrations per member state
- Qualified company seals: Organizational-level QES for high-volume regulated document issuance; available for bulk sealing workflows
- EU-wide legal recognition: Automatic recognition across all 27 EU member states without country-by-country verification
Workflow and enterprise integration:
- REST API: Workflow integration into existing document lifecycle systems
- Enterprise customer base: BMW, voestalpine, Fresenius Kabi, KTM, and The Adecco Group among 100+ enterprise deployments
- DACH market depth: Primary presence in Germany, Austria, and Switzerland, with broader EU coverage
Best For
XiTrust MOXIS is best suited for European enterprises in Germany, Austria, and across the EU with a direct eIDAS QES compliance obligation. Financial institutions processing mortgage agreements, government agencies issuing legally binding digital documents, and enterprise HR platforms handling employment contracts across EU member states represent MOXIS’ primary buyers. Organizations requiring MOXIS for individual signer QES or organizational qualified company seals will find the platform’s trust service provider integrations address that requirement comprehensively.
Pricing
XiTrust MOXIS requires a demo and sales engagement before pricing is disclosed. No publicly listed tiers or self-serve access are available. Teams evaluating MOXIS should plan for a sales-led procurement cycle typical of enterprise compliance platforms in regulated European industries.
Who Should Choose Verdocs
Choose Verdocs if your team is building eSignature as a feature inside your own application. Verdocs is the best overall pick for development and product teams in this comparison. It offers the deepest embedding toolkit: 60+ native web components, open-source MIT SDK, free tier with full API access, SOC 2 Type 1 certification, and Microsoft Commercial Cloud certification.
Specific scenarios where Verdocs is the strongest fit:
- SaaS products with embedded signing: Fintech platforms, insurance portals, legal workflow tools, real estate software, and accounting applications where customers sign inside the product
- Microsoft Commercial Cloud environments: Teams building on SharePoint, Dynamics 365, Power Platform, or Teams who need certified embedded eSignature
- Developer-led procurement: Engineering teams evaluating eSign APIs who want open-source SDKs, free-tier testing, and MIT-licensed components they can inspect and extend
- White-label requirements: Agencies or platform builders who must deliver a fully branded signing experience with no third-party branding visible to end users
- ISV resale: Independent software vendors who want to embed and resell eSignature capability under their own brand
- Regulated North American and global verticals: SOC 2 Type 1 certification, PKI digital certificates, and KBA authentication cover fintech, insurance, legal, and real estate compliance requirements without additional infrastructure overhead
Who Should Choose SignChain
Choose SignChain if your organization has an explicit blockchain verification requirement written into a procurement contract, compliance framework, or regulatory obligation. SignChain is the right tool when trustless, on-chain audit trail verification is the stated requirement, not a preference.
Supply chain compliance frameworks mandating blockchain-anchored attestation of supplier agreements, cross-border transactions between counterparties in jurisdictions with no shared trust authority, and intellectual property registration workflows where neutral ledger timestamps carry legal weight are the use cases SignChain was built for. Engineering teams evaluating SignChain can review public pricing and test the limited free plan before committing to a paid tier.
Teams that need embedded signing inside a custom application, white-label UI control, or EU eIDAS QES compliance should evaluate Verdocs or XiTrust MOXIS instead. Verdocs’ free developer tier provides immediate API access with no sales conversation required.
Who Should Choose XiTrust MOXIS
Choose XiTrust MOXIS if your organization operates in European markets where eIDAS Qualified Electronic Signatures are a legal or compliance requirement. MOXIS is purpose-built for EU-regulated industries requiring QES with native EU-accredited trust service provider integration, across multiple member states from a single platform deployment.
Financial institutions processing mortgage agreements, government agencies issuing binding digital documents, and enterprise HR platforms managing employment contracts across EU member states represent MOXIS’ strongest fit. Organizations requiring qualified company seals for bulk high-volume regulated document issuance will find that capability natively supported. MOXIS’ enterprise customer base across Germany, Austria, and the broader EU reflects its alignment with regulated European procurement requirements.
Organizations outside the EU, or development teams needing embedded in-app signing with a self-serve evaluation path, will find Verdocs a more direct fit. Verdocs supports eIDAS AES via partner integrations for teams with AES requirements that do not extend to QES.
Final Verdict
The SignChain vs XiTrust vs Verdocs comparison comes down to the architecture of your signing workflow. These three platforms serve distinct buyers and are rarely evaluated against each other in the same procurement process.
- Verdocs is the best choice for development teams building eSignature as a feature inside their own product. Its API-first design, 60+ native web components, open-source MIT-licensed SDKs, and full CSS white-label capability give engineering teams more control than any comparable platform in this comparison. The free tier with 25 envelopes per month makes it low-risk to evaluate. SOC 2 Type 1 certification, modular HSM integration, and KBA authentication cover regulated industry requirements globally. The Microsoft Commercial Cloud certification extends reach into enterprise environments. Customer implementations (MRP Realty, Appcom, Foundations) span fintech, mobile, and operations use cases.
- SignChain is the right call for organizations where on-chain, trustless document verification is a compliance mandate rather than a preference. Its blockchain architecture addresses a requirement that no centralized eSignature platform can meet by design. Public pricing and a limited free plan allow technical evaluation before commercial commitment.
- XiTrust MOXIS is the answer for European enterprises with eIDAS Qualified Electronic Signature obligations. Native integration with multiple EU-accredited trust service providers, qualified company seal support, and automatic EU-wide legal recognition make it the compliance-first platform for a compliance-first requirement in Germany, Austria, and across the EU.
For product and engineering teams ready to build embeddable document workflows, start for free: 25 envelopes/month, no credit card required.
Frequently Asked Questions
What is the difference between SignChain, XiTrust, and Verdocs?
SignChain uses blockchain technology to create cryptographically hashed, immutable on-chain document records for trustless verification without relying on a central authority. XiTrust MOXIS specializes in Qualified Electronic Signatures under eIDAS for European regulatory compliance, with native trust service provider integrations and company seal support. Verdocs is an API-first embeddable eSignature platform for development teams, offering 60+ native web components, open-source SDKs, and a free tier for building in-app signing workflows.
Which platform is best for developers embedding signing into an application?
Verdocs is built specifically for this use case. Its 60+ native web components render inside your application’s DOM — not iframes — and accept standard CSS styling. Open-source MIT-licensed SDKs support React, Angular, Vue, vanilla JS, and TypeScript. A free developer tier with 25 envelopes per month and no credit card required allows a complete technical proof of concept before any commercial commitment. See the Verdocs platform comparison for a full feature and capability breakdown.
Does Verdocs support eIDAS compliance?
Verdocs supports eIDAS Advanced Electronic Signatures (AES) via partner integrations. For Qualified Electronic Signatures (QES), the highest eIDAS signature level carrying mandatory legal recognition across all EU member states, XiTrust MOXIS provides native QES from multiple EU-accredited trust service providers. Teams with AES requirements can use Verdocs; teams with QES obligations should evaluate XiTrust MOXIS.
Which platform has a free tier?
Verdocs offers a self-serve free tier with 25 envelopes per month and no credit card required, with immediate REST API and SDK access. SignChain also offers a limited free plan covering 2 documents and 2 recipients per document, with public pricing for paid tiers. XiTrust MOXIS requires a demo and sales engagement before pricing is available.
What makes Verdocs different from iframe-based solutions?
Verdocs uses native web components — standards-based HTML custom elements — rather than iframes to render the signing experience. Native web components render inside your application’s DOM, accept your CSS variables and design tokens, and fire standard DOM events your existing handlers can consume. Iframe-based solutions stop at the iframe boundary: your CSS cannot reach inside, your JavaScript cannot access the DOM, and the signing experience looks and behaves like a third-party portal embedded in your page. Verdocs’ component-based approach eliminates that boundary entirely. Development teams own the complete user experience, including email templates, signing UI, and document certificates.