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Cosmian Data Protection Suite

cosmian.com

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Spec score 9.0 #3 of 23 in Cloud Encryption Software

What it is

Cosmian Data Protection Suite provides cryptographic tools for protecting data in use and in public clouds. Its products include key management, confidential computing, confidential AI, and encrypted search. Cosmian KMS centrally manages encryption, decryption, keys, and certificates, with storage, generation, rotation, distribution, and usage policies. KMS is fully open source and includes FIPS 140-3 validated libraries, Covercrypt post-quantum encryption with access policies, and Findex searchable encryption. Cosmian offers verifiable confidential virtual machines and confidential AI runners for cloud workloads. Cosmian AI supports confidential GenAI translation and summarization without coding, with Word and Chrome integrations. Findex provides encrypted exact, prefix, and suffix searches with Rust, JavaScript, Python, Java, and Flutter wrappers. Products are available through AWS, Azure, and Google Cloud marketplaces. Deployment options include hybrid, self-hosted, API, extension, Linux, macOS, web, and Windows.

Spec sheet

What it does
The suite combines key management, confidential computing, confidential AI, encrypted search, and post-quantum encryption for protecting data in use, at rest, and in transit.Read 14 Oct 2026 · cosmian.com
API
The KMS exposes a KMIP-compatible API and the documentation includes API endpoints, JSON TTLV, and operation references.Read 14 Oct 2026 · docs.cosmian.com
Support
Cosmian directs technical users to online documentation, GitHub, and a Discord technical community.Read 14 Oct 2026 · docs.cosmian.com
License
The GitHub organization identifies the KMS as source available under the Business Source License BUSL-1.1, so the suite is not uniformly open source under one permissive license.Read 14 Oct 2026 · github.com
CLI and GUI
KMS provides a command-line client with integrated help plus a graphical interface supporting client certificates and OIDC tokens.Read 14 Oct 2026 · docs.cosmian.com
Cloud marketplaces
Cosmian products are offered through AWS, Azure, and Google Cloud marketplaces.Read 30 Sep 2026 · cosmian.com
Company founded
LinkedIn lists Cosmian as founded in 2018.Read 14 Oct 2026 · linkedin.com
Company headquarters
LinkedIn lists headquarters at 55 Rue La Boétie in Paris, France.Read 14 Oct 2026 · linkedin.com
Company size
LinkedIn lists Cosmian as a privately held company with 11–50 employees.Read 14 Oct 2026 · linkedin.com
Confidential AI
Cosmian AI supports confidential text translation and summarization inside Cosmian VM and offers Word and Chrome plugin integrations.Read 14 Oct 2026 · cosmian.com
Confidential computing
Cosmian offers verifiable confidential virtual machines and confidential AI runners that keep code and data protected in cloud environments.Read 30 Sep 2026 · cosmian.com
Confidential VM
Cosmian VM isolates workloads in hardware-backed trusted execution environments with memory encryption, disk encryption, and host isolation.Read 14 Oct 2026 · eviden.com
Covercrypt
Covercrypt is presented as a client-side encryption library with post-quantum resistance and encrypted access policies.Read 14 Oct 2026 · cosmian.com
Cryptography
KMS embeds FIPS 140-3 validated libraries, Covercrypt post-quantum encryption with access policies, and Findex searchable encryption.Read 30 Sep 2026 · cosmian.com
Database integrations
KMS documentation lists Oracle TDE, MongoDB, MySQL Enterprise, Microsoft SQL Server External EKM, and PostgreSQL integrations.Read 14 Oct 2026 · docs.cosmian.com
Documentation depth
The technical documentation is organized by security use case and product and includes installation, configuration, integrations, API, algorithms, audits, compliance, and KMIP operation references.Read 14 Oct 2026 · docs.cosmian.com
Encrypted search
Cosmian Findex provides encrypted exact, prefix, and suffix searches and has Rust, JavaScript, Python, Java, and Flutter wrappers.Read 30 Sep 2026 · cosmian.com
Findex
Cosmian Findex provides probabilistically encrypted exact, prefix, and suffix search over encrypted indexes.Read 14 Oct 2026 · cosmian.com
Findex performance
The Findex page reports approximately eight-microsecond search latency and twelve-microsecond insert latency.Read 14 Oct 2026 · cosmian.com
Findex SDKs
Findex is offered as a Rust library with JavaScript, Python, Java, and Flutter wrappers.Read 14 Oct 2026 · cosmian.com
Free test limits
The KMS demo server is free to test, resets its database weekly, requires no authentication, and has no graphical interface.Read 30 Sep 2026 · cosmian.com
Funding
Elaia reports a €1.4 million seed round for Cosmian in March 2019, led by Elaia with Acequia Capital, Fiblac, and business angels participating.Read 14 Oct 2026 · elaia.com
HSM integrations
Supported HSM families include Trustway Proteccio, Crypt2Pay, Utimaco, Nitrokey HSM 2, and SmartCard HSMs.Read 14 Oct 2026 · docs.cosmian.com
HSM support
KMS supports HSMs including Trustway Proteccio, Crypt2Pay, Utimaco, Nitrokey HSM 2, and Smartcard HSMs.Read 30 Sep 2026 · docs.cosmian.com
Key lifecycle
KMS supports key storage, generation, rotation, distribution, and usage policies.Read 14 Oct 2026 · marketplace.microsoft.com
KMS
Cosmian KMS centrally manages encryption and decryption operations, keys, and certificates, including lifecycle controls and PKI integration.Read 14 Oct 2026 · cosmian.com
KMS architecture
The KMS is a Rust server that combines key lifecycle management, an encryption service, and public-key infrastructure.Read 14 Oct 2026 · docs.cosmian.com
KMS integrations
Documented integrations include AWS BYOK and Fargate, Azure BYOK and EKM, Google CMEK and CSEK, Google Workspace CSE, and Microsoft 365 DKE.Read 14 Oct 2026 · docs.cosmian.com
KMS performance
The KMS product page claims up to five million messages processed in under five seconds for on-the-fly encryption.Read 14 Oct 2026 · cosmian.com
KMS standards
KMS supports KMIP versions 1.0–1.4 and 2.0–2.1 in binary and JSON formats and offers FIPS 140-3 mode.Read 14 Oct 2026 · docs.cosmian.com
Legal name
Crunchbase identifies the legal entity as Cosmian Tech SAS.Read 14 Oct 2026 · crunchbase.com
Limit: demo server
The free KMS demo has weekly database resets, requires no login, and has no graphical interface.Read 14 Oct 2026 · cosmian.com
Limit: Findex roadmap
Semantic similarity search is described as a future enhancement rather than a current capability.Read 14 Oct 2026 · cosmian.com
Notable news
Eviden announced on October 6, 2025 that Cosmian KMS technology was integrated into Eviden’s cybersecurity product offering.Read 14 Oct 2026 · eviden.com
Ownership
Crunchbase lists Cosmian as acquired by Atos and as a sub-organization of Atos.Read 14 Oct 2026 · crunchbase.com
Performance
The KMS product page states that up to 5 million messages can be processed in under 5 seconds.Read 30 Sep 2026 · cosmian.com
Praise: independent review coverage
Independent directories report no user reviews, so they provide no repeated reviewer praise or complaint pattern.Read 14 Oct 2026 · sourceforge.net
Rating on G2
0 out of 5 from 0 ratingsRead 14 Oct 2026 · g2.com
Rating on SourceForge
0.0 out of 5 from 0 reviewsRead 14 Oct 2026 · sourceforge.net
SDKs
Client support is documented for Python, JavaScript, Dart, Rust, C/C++, and Java through Cosmian cloudproof libraries.Read 14 Oct 2026 · docs.cosmian.com
Self-hosting
KMS can be deployed with Debian or RPM packages, Windows and macOS installers, or standard and FIPS Docker images.Read 14 Oct 2026 · docs.cosmian.com
Standards
KMS supports FIPS 140-3 mode and KMIP versions 1.0-1.4 and 2.0-2.1 in binary and JSON formats.Read 30 Sep 2026 · docs.cosmian.com
Storage integrations
KMS documentation lists VMware, Veeam Backup & Replication, Synology DSM, Snowflake, and Databricks or Spark user-defined functions.Read 14 Oct 2026 · docs.cosmian.com
Suite purpose
Cosmian provides a data protection suite using next-generation cryptography to secure data in use and protect data in public clouds.Read 30 Sep 2026 · cosmian.com
System requirement
Current KMS documentation requires GLIBC 2.34 or newer, available in Debian 12+, Rocky Linux 9+, and Ubuntu 22.04+.Read 14 Oct 2026 · github.com
VM hardware limits
The Microsoft Marketplace listing instructs users to deploy the VM only on DCasv5 or DCadsv5 machine families.Read 14 Oct 2026 · marketplace.microsoft.com
VM verification
The VM verifies hardware, boot state, and installed software through signed snapshots and continuous monitoring.Read 14 Oct 2026 · marketplace.microsoft.com
Workplace integrations
KMS integrates with Google Workspace Client Side Encryption and Microsoft 365 Double Key Encryption.Read 30 Sep 2026 · docs.cosmian.com

Plans and prices

KMS demo server Free database resets weekly · no authentication · no graphical interface · REST API and CLI access Read 14 Oct 2026 · cosmian.com
Cosmian KMS Priced on request per-CPU pricing · no hidden costs · all connectors included · any number of servers Read 14 Oct 2026 · docs.cosmian.com

Every Cosmian Data Protection Suite plan and price →

Strong points and limits

Strong points

  • Open-source central key management
  • Automated key rotation and policy controls
  • Confidential computing and AI options
  • Encrypted exact, prefix, and suffix search
  • Available through three cloud marketplaces

Limits

  • Free KMS demo resets weekly
  • Demo requires no authentication
  • KMS demo has no graphical interface

Who it suits

The suite suits organizations protecting cloud data, encryption keys, confidential workloads, or searchable encrypted information. It supports teams using hybrid or multi-cloud deployments and listed workplace integrations.

Verdict

Cosmian combines open-source key management with confidential computing, AI, and encrypted search. Its hybrid and multi-cloud options cover several deployment patterns, while commercial pricing requires direct evaluation.

Where Specifiction places it

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