A solution certified by

The only E2E encryption SDK,
certified in Europe.

End-to-end encryption protects data in such a way that no one except the authorized users are able to read the data, not even the servers hosting the data or the app developer.

  • Multipharma
  • Framatome
  • psa
  • Lefebvre Sarrut
  • Recare

Every year around the world, data leaks cost companies $3,000 billion, more than France's GDP (Juniper Research 2019).

  • Robust encryption

    Robust encryption

    Seald offers ANSSI-certified end-to-end encryption with no backdoor.

  • Transparent experience

    Transparent experience

    A technology that does not change the habits of your users or collaborators.

  • Easy to integrate

    Easy to integrate

    Integrating Seald into your application is simple, without having to be an expert.


Built for companies who make data security a strategic priority

Every industry has its own data security challenges: strengthening customer trust, achieving compliance, minimizing the consequences of a data breach, ...

Seald addresses these challenges by offering to simply integrate end-to-end encryption into your applications.

The privacy of your customers' data will be assured by design with Seald's certified technology, protecting them even in the event of a data breach.

Laurent Delaporte
Seald is a key element in gaining the trust of our users. The simplicity of integration has allowed us to focus on the product and marketing.

Laurent Delaporte

Former Vice President @Microsoft Advertising

Our difference

Your data remains protected, even in the event of a server attack

Server-side encryption

Server-side encryption

By using server-side encryption (including KMS, HSM or BYOK), the data is first transferred in its clear-text version and is then protected with encryption by the server.

The servers therefore have access to a clear-text version of the data, which means that if compromised, the data would become vulnerable.

End-to-end encryption

End-to-end encryption

By using Seald, data is secured on the client side, before being sent to the server.

This way, neither Seald nor the cloud hosting company can decrypt the protected data, even if servers are compromised.


Quickly integrate encryption into your applications with Seald SDKs. You don't need skills in cryptography to integrate them.

Seald environment