Carmentis

What Carmentis does

Carmentis is a French startup (Carmentis SAS, Paris) founded in 2022 that operates a blockchain-based business proofkeeping platform. The platform enables teams, partners, and customers to certify, anchor, and verify essential business documents — contracts, invoices, KYC records, payment proofs, trade finance documents, and digital content — immutably on a dedicated blockchain optimized for proof storage rather than general-purpose computation. Core technical components include a proprietary microblockchain architecture composed of microblocks anchored on a main chain, channel-based asymmetric encryption for granular access control, Merkle-tree-based proof of authenticity, a server-side Carmentis Operator handling cryptographic operations and REST API exposure, a Carmentis Wallet for user identity and signing, and a Carmentis Desk desktop console for node and operator administration. The product surface is complemented by a public File Sign demo application and a developer portal (docs.carmentis.io) with a free testnet.

The platform is positioned for eIDAS-compliant electronic signatures and upcoming PSD3 regulatory requirements in the EU. Target verticals span banking and insurance (trade finance documentation), payment service providers (prepaid cards, third-party payments, vouchers), fiduciary and trust management, asset management, media and entertainment (deepfake protection, content authentication), and debt collection/recovery. The business model combines a usage-based CMTS token economy (tokens used to pay anchoring transaction fees and wallet operations) with platform/API subscription monetization for enterprise deployments. The go-to-market motion is API-first and developer-led: a self-serve developer portal with testnet faucet, comprehensive documentation, GitHub presence, and community channels (Telegram, Discord, X, LinkedIn, Medium, YouTube), supplemented by direct enterprise sales for larger deployments, a CMTS token pre-sale channel, and a partner validation node program.

The current operating footprint is small: 1–10 employees, co-founded by Julien Braun (CEO) and Arnauld Chevallier (CTO), with backing from Seraip Ventures, X Creation, and business angels Pierre Lepape, Ambroise Popper, and Chloé Mayenobe. The company has named design-partner customers — Verifiabl.AI (digital content authentication), Blitz (non-performing loan tracking, related to investor Xavier Badiche), and Facturer Facile (SMB invoicing). The company is in an active pre-launch phase, with no public disclosure of revenue, institutional funding rounds, or contract values.

Name

Carmentis

Legal name

Carmentis SAS

Website

https://carmentis.io

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

1–10 employees

Short description

Carmentis is a French blockchain startup offering a microblockchain-based business proofkeeping platform that anchors and verifies contracts, invoices, KYC records, and digital content for verticals including banking, insurance, payments, fiduciary, and media. It monetizes via CMTS tokens and platform subscriptions through an API-first, developer-led go-to-market.

Ownership category

akta.pro rank

Product category

Blockchain Document Verification

NAICS

Software Publishers (5132), Financial Transactions Processing, Reserve, and Clearinghouse Activities (522320)

SIC

Finance Services (6199)

akta.pro primary industry

Regulatory Reporting, Tax & Audit Trails (reconciliation, provenance) (FSAPAJAI)

akta.pro secondary industries

Proof of Reserves, Attestations & On-Chain Audit/Assurance (FSADALAK), Interoperability & Integration Middleware (ERP/core banking connectors, messaging, APIs, cross-chain to permissioned) (FSAPAIAL)

Keywords

• Blockchain proofkeeping
• Business document certification
• Microblockchain architecture
• Deepfraud protection
• Electronic signature verification

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. CMTS Token Economy: Carmentis operates a native token (CMTS) used as the currency on the blockchain. The platform has a CMTS token pre-sale open. Users need CMTS tokens to pay transaction fees for anchoring microblocks on the blockchain and for wallet operations.
2. Platform Services and API Access: Monetization through platform access, API usage, and potentially subscription tiers for enterprise deployments, operator hosting, and premium support services.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels8 records

Core offering

Carmentis provides a blockchain-based business proofkeeping platform that enables businesses to anchor, verify, and share essential documents (contracts, invoices, KYC documents, transactional proofs) on an immutable distributed ledger. The platform uses a proprietary microblockchain architecture with channel-based encryption and encrypted APIs to deliver tamper-evident document certification, eIDAS-compliant electronic signatures, and deepfraud protection for multi-party business transactions.

Product overview

Carmentis is a blockchain-based business proofkeeping platform that simplifies the management and certification of business documents on the blockchain. The core offering consists of the Carmentis Blockchain Platform, which uses microblockchain architecture for efficient proof storage. The product suite includes the Carmentis Web Interface for document management, Carmentis Wallet for user identity and approvals, Carmentis Desk for desktop administration and node management, and the Carmentis Operator server for backend API integration. The File Sign demo application showcases document signing capabilities. All components are designed to work together through encrypted APIs, enabling businesses to anchor, verify, and share proofs throughout transactional workflows.

Differentiator

Problem solved

Functional benefit

Products and services

• Carmentis Blockchain Platform

Quantifiable outcome

• 3,000% increase in deepfake fraud attempts demonstrates market need for blockchain proofkeeping solutions
• +2 more outcomes

Named customers3 records

Segments6 records

Ideal customer profiles7 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration8 records

AI capability1 record

Feature6 records

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• KILT Protocol: KILT is a blockchain-based decentralized identity and attestations protocol that lets issuers create verifiable credentials and proofs. It is the closest direct competitor to Carmentis's blockchain proofkeeping and attestation use cases, sharing the same Web3-native stack and target of certifying digital claims.
• Dock Labs: Dock provides a blockchain-based verifiable credentials platform for issuing, holding, and verifying digital credentials. It competes directly with Carmentis in the enterprise attestation and document authenticity space, particularly for KYC and credentialing workflows.
• Trinsic: Trinsic is a verifiable credentials network and platform for building digital identity and proof applications. Like Carmentis, it targets developers and enterprises that need to anchor and verify claims on distributed infrastructure.
• Indicio: Indicio is a decentralized identity technology company building verifiable credential infrastructure for governments and enterprises. It directly parallels Carmentis's focus on certified digital documents and proof authenticity, often targeting similar regulated-industry use cases.

Broad incumbents

• Polygon ID: Polygon ID is the identity and verifiable credentials layer of the Polygon ecosystem, offering on-chain identity proofs and attestations at scale. It is a broader incumbent leveraging Polygon's existing developer ecosystem that overlaps with Carmentis's identity and proofkeeping use cases.
• R3 Corda: R3's Corda is an enterprise-grade distributed ledger platform widely used in banking, trade finance, and insurance for document and transaction proofs. It competes with Carmentis in the same enterprise verticals with a more mature, consortium-backed stack.
• Hyperledger Fabric: Hyperledger Fabric is a permissioned blockchain framework under the Linux Foundation, widely deployed for enterprise document provenance and proof workflows. It competes with Carmentis's microblockchain approach for business proofkeeping use cases at larger incumbents.
• Chainlink Proof of Reserve: Chainlink's Proof of Reserve and attestation services provide on-chain verification of off-chain data and reserves, a directly overlapping use case to Carmentis's anchoring of business proofs. As an incumbent oracle network, Chainlink competes for institutional attestation workloads.

Emerging players

• Concordium: Concordium is an enterprise-focused blockchain with built-in identity features at the protocol level. It is comparable to Carmentis in combining on-chain identity with business-grade proofkeeping and compliance orientation.
• Propy: Propy is a blockchain-based real estate transaction platform that records and verifies property documents on-chain. It represents an emerging vertical-specific proofkeeping peer, comparable in approach to how Carmentis anchors trade finance and asset management documents.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

• GitHubgithub.com/carmentis
• Xtwitter.com/carmentis
• LinkedInlinkedin.com/company/carmentisnetwork

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

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 Carmentis