What Seald does

Seald is a French end-to-end encryption SDK provider, founded in 2016 and headquartered in Roubaix, France, that sells developer-facing cryptographic infrastructure to software vendors and regulated enterprises. The company's core product is the Seald SDK, a multi-platform end-to-end encryption library (covering JavaScript, Swift, Kotlin, Java, Go, C, React Native, and Flutter) that allows customers to embed zero-trust encryption directly into web, mobile, and desktop applications. Around this core SDK, Seald has built a broader product surface including the Seald Desktop Application for non-developer end-users, Sig-Chain (a proprietary blockchain-like identity-verification layer), the 2-Man Rule governance feature for collaborative access, FileDrop for encrypted file transfer, SSKS (Seald Secret Key Store) for managed key escrow, Seald-CLI for command-line automation, and an Anonymous SDK variant for identity-anonymized deployments. The platform is positioned around compliance frameworks including GDPR, HIPAA, CCPA, NIS2, and eIDAS, and holds ANSSI CSPN first-level security certification, the French national cybersecurity authority's formal security visa.

Seald's go-to-market is enterprise SDK licensing sold on a quote-based pricing model, targeting verticals with high data-protection budgets: healthcare, legal, insurance, and software/SaaS. Named enterprise references include Framatome, Stellantis, Love Honey Group, Lefebvre Sarrut, Doktor, and LPG, alongside smaller-scale customers such as Qapa, Wimi, Recare, and OurCal. The business has historically operated with a very small team (1-10 employees), with one disclosed seed/pre-seed-equivalent funding round of approximately $946,952 in December 2017 (Bpifrance, 50 Partners, The Refiners, Wind) and selection as a France 2030 Laureate in April 2023 providing non-dilutive state capital.

In January 2026, Seald was acquired by OVHcloud, integrating its SDK into the parent company's secure cloud portfolio and opening OVHcloud Labs as a new distribution channel. This acquisition materially changes Seald's commercial trajectory, shifting it from independent developer-tool sales into the product line of one of Europe's largest cloud infrastructure providers, while retaining its existing customer base and ANSSI-certified positioning as a regulatory differentiator in the French and European enterprise market.

Name

Seald

Legal name

Seald SAS

Website

https://seald.io

Company type

Private

Founded year

2016

Operating status

Acquired

Headcount range

1–10 employees

Short description

Seald provides end-to-end encryption SDKs and enterprise desktop tools that protect sensitive data across web, mobile, and desktop platforms. Headquartered in France, it serves healthcare, legal, insurance, and SaaS customers with ANSSI-certified cryptography, and was acquired by OVHcloud in January 2026.

Ownership category

akta.pro rank

Product category

Encryption Software

NAICS

Security Systems Services (56162), Security Systems Services (except Locksmiths) (561621)

akta.pro primary industry

Encryption (Data-at-Rest / In-Transit / In-Use) (HDADAFAB)

akta.pro secondary industry

Email Data Loss Prevention & Encryption (HDADAKAD)

Keywords

• End-to-end encryption
• Encryption SDK
• Developer cryptography tools
• Data sovereignty software
• Secure messaging SDK

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. SDK Licensing (Enterprise): Seald generates revenue primarily through licensing its end-to-end encryption SDK to enterprise customers. Businesses integrate the SDK into their applications to add end-to-end encryption capabilities. Pricing is quote-based, tailored to customer size, usage, and deployment requirements.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Seald provides a developer-friendly end-to-end encryption SDK that enables application developers to integrate client-side encryption into web, mobile, and desktop applications. The platform uses a zero-trust architecture where private keys never leave the client, supports multi-platform SDKs (JavaScript, Swift, Kotlin, Java, Go, C), and includes complementary products like the Seald Desktop Application for file/email encryption, Sig-Chain key verification, and 2-Man Rule key recovery. The technology enables enterprises in healthcare, legal, and insurance to protect sensitive data while complying with HIPAA, GDPR, CCPA, and ANSSI regulations.

Product overview

Seald is an end-to-end encryption platform offering developer-friendly SDKs and enterprise applications. The core Seald SDK enables developers to integrate encryption into any application, while the Seald Desktop Application provides a complete enterprise solution with file and email encryption, Microsoft Outlook integration, and an administration dashboard. Key supporting modules include the Seald Sig-Chain for cryptographic integrity verification, the 2-Man Rule (SSKS-2MR) for key recovery without backdoors, FileDrop for receiving encrypted files from external users, SSKS for third-man rule key management, Seald-CLI for programmatic operations, and the Anonymous SDK for sender-anonymous encryption. The platform supports multi-device synchronization, group encryption, and compliance with data protection regulations.

Differentiator

Problem solved

Functional benefit

Products and services

• Seald SDK
• Seald Desktop Application
• Seald Sig-Chain
• Seald 2-Man Rule (SSKS-2MR)
• Seald FileDrop
• Seald SSKS (Secret Key Storage Service)
• Seald-CLI
• Seald Anonymous SDK

Quantifiable outcome

• 500M+ pieces of data secured with Seald

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature7 records

Partnerships

One partnership is on record.

• OVHcloudflagship / coreStrategic or Co-development Partner · 1 January 2026OVHcloud acquired Seald in Q1 FY2026 (completed during the quarter ending November 2025, announced January 2026). This is a strategic acquisition that integrates Seald's end-to-end encryption capabilities into OVHcloud's cloud services portfolio. The acquisition strengthens OVHcloud's data sovereignty offering, allowing European enterprises to use OVHcloud's cloud infrastructure with end-to-end encryption that ensures data remains unreadable even to OVHcloud itself. Post-acquisition, Seald is discoverable through OVHcloud Labs.

Scale indicators2 records

Recent moves4 records

Expansion highlights6 records

Direct peers

• Virgil Security (now Particle): Virgil Security offered end-to-end encryption SDKs for developers to integrate into applications across mobile, web, and IoT—directly comparable to Seald's core developer-SDK model with similar cryptographic primitives and key management focus.
• Keybase: Keybase offered end-to-end encrypted messaging and file sharing with a developer-friendly API before being acquired by Zoom. Comparable to Seald in targeting developer integration of E2E encryption primitives into applications.

Broad incumbents

• Wickr (AWS): Acquired by AWS in 2021, Wickr provides end-to-end encrypted messaging and collaboration with SDK-style APIs. Comparable as a developer-friendly E2E encryption platform but now embedded within a hyperscaler's broader portfolio, similar to Seald's OVHcloud positioning.
• Proton (ProtonMail / Proton Drive): Proton provides end-to-end encrypted email, storage, and VPN with strong European privacy positioning and Swiss jurisdiction. Comparable as a sovereign European encryption brand, though Proton is consumer/SMB-oriented versus Seald's developer SDK model.
• Thales (CipherTrust / Luna HSM): Thales offers enterprise data security including encryption, key management, and HSMs—broadly comparable as a major incumbent in data protection and key management, though Thales serves larger enterprises with hardware-centric offerings rather than developer SDKs.
• Entrust: Entrust provides PKI, encryption, and identity solutions including nShield HSMs and data protection platforms. Comparable as a broader incumbent in cryptographic infrastructure, though Entrust focuses on enterprise PKI/HSM rather than developer-integrated E2E encryption.

Emerging players

• Tresorit: Tresorit provides end-to-end encrypted file storage and sharing, with Tresorit Drive and developer-focused zero-knowledge encryption. Comparable as an E2E encryption provider targeting regulated enterprises, though more consumer/file-sharing oriented versus Seald's SDK-first approach.
• p≡p (pretty easy privacy): p≡p provides E2E encryption for email and messaging with developer integration pathways. Comparable as a European-rooted privacy-by-default encryption offering targeting regulated use cases, similar to Seald's sovereign-cloud positioning.
• Wire: Wire offers end-to-end encrypted messaging, voice, and collaboration APIs for enterprises with a strong European footprint. Comparable to Seald in serving regulated industries with certified encryption, though Wire focuses on a full collaboration suite rather than SDK primitives.

Others

• HashiCorp Vault: HashiCorp Vault provides encryption-as-a-service and key management APIs widely used by developers to handle sensitive data. Comparable as developer-facing cryptographic infrastructure, though Vault focuses on secrets/key management rather than full E2E encryption with client-side key isolation like Seald.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/SealdHQ
• GitHubgithub.com/seald
• LinkedInlinkedin.com/company/seald

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds1 record

Investors4 records

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 Seald