Keyban

Cover Block

Field	Value
Name	Keyban
Tagline	Blockchain-powered API for Digital Product Passport, Loyalty Programs, and Stablecoin Payments
Headquarters	131 boulevard Pereire, 75017 Paris, France
Founded	2022
Stage	Seed
Business Model	SaaS (API / SDK infrastructure)
Industry	E-commerce / Retail
Technology	Blockchain / Web3
Geography	Western Europe
Growth Profile	Venture Scale
Founding Team	Co-Founders (3+)
Funding Label	Pre-Seed €500,000

Links

• Website: https://www.keyban.io/
• Documentation: https://docs.keyban.io/
• LinkedIn (CTO profile, company page not separately confirmed): https://www.linkedin.com/in/keibrousmiche/
• GitHub: https://github.com/keyban-io
• Crunchbase: https://www.crunchbase.com/organization/keyban

The Short Version

Keyban is a Paris-based infrastructure startup selling a blockchain API and SDK that lets retail and commerce brands embed wallets, Digital Product Passports (DPP), on-chain loyalty, and stablecoin payments without hiring blockchain engineers [Keyban]. The company was founded in 2022 by a group of operators and researchers led by CEO Charles Kremer, with CTO Kei Brousmiche (Ph.D. in artificial intelligence, active in blockchain research since 2016) and COO Nenad Cetkovic, formerly COO of e-commerce feed manager Lengow [TechCrunch, 2015] [LinkedIn]. The core product is a tokenization layer that abstracts wallet provisioning, NFT minting, and multi-chain interoperability behind a React and JavaScript SDK [Keyban docs]. Commercially, the firm has anchored its early go-to-market around the EU Digital Product Passport regulation by partnering with Weavenn, the joint venture of Fnac Darty and CEVA Logistics, on a Tokenized Product Passport platform targeted for launch by Q3 2025 [Supply Chain Magazine, 2025] [Ecommerce Mag]. Funding to date is reported as a Pre-Seed of approximately €500,000, with a further pre-seed event noted in March 2026 [AccessNewswire, 2026].

Data Accuracy: GREEN -- Confirmed across Keyban primary documentation, Crunchbase, Supply Chain Magazine, and TechCrunch.

The Company in Brief

Keyban was incorporated in September 2022 and is headquartered at 131 boulevard Pereire in the 17th arrondissement of Paris [My French Startup]. The company was assembled around a thesis that the next regulatory and consumer wave in European retail, the Digital Product Passport, would require commerce brands to issue, store, and transfer cryptographically anchored product records at a scale that conventional database vendors are not built to serve. Rather than ship a vertical DPP application, the founders chose to build the underlying tokenization layer and distribute it as an API and SDK [Keyban docs] [Frenchweb].

The founding group is unusually large for a pre-seed company: Charles Kremer (CEO), Kei Brousmiche (CTO), Nenad Cetkovic (COO), Sébastien Dolard (Chief Product Officer), Maxime Vanmeerbeck (Software Lead), and Leo Brousmiche are all listed as co-founders or founding team members [Prospeo] [LinkedIn] [My French Startup]. Kremer's prior path runs through Eniblock, IRT SystemX, and Thales Avionics [RocketReach]. Cetkovic's tenure as COO of Lengow, a French e-commerce feed management company that raised a €10M Series B in 2015, supplies the operational link to retail and marketplace customers [TechCrunch, 2015].

The most consequential public milestone to date is the announcement of a partnership with Weavenn, the joint venture between Fnac Darty and CEVA Logistics, to co-develop a Tokenized Product Passport platform, with a launch reported for Q3 2025 [Supply Chain Magazine, 2025] [Ecommerce Mag]. A further pre-seed funding event was reported in March 2026 [AccessNewswire, 2026].

Data Accuracy: GREEN -- Triangulated across My French Startup, Prospeo, Supply Chain Magazine, and TechCrunch.

What They Have Built

Keyban's product is positioned as "the tokenization layer that lets you embed wallets, digital product passports, and on-chain loyalty, no blockchain expertise needed" [Keyban docs]. Architecturally, the offering is split into an Embedded Wallet SDK that handles key management and account abstraction, a JavaScript SDK (@keyban/sdk-base) that exposes account, transaction, balance, and NFT primitives, and a React SDK that wraps those primitives in hooks and components for front-end integration [Keyban docs]. A backend OpenAPI surface complements the client SDKs for server-to-server integration [Keyban docs]. The company also publishes eleven repositories under its GitHub organization [GitHub].

Three solution areas are documented today. The first is Digital Product Passport issuance, where each physical good is bound to a tokenized record that can travel with the product through resale and ownership transfer [Keyban docs] [Frenchweb]. The second is on-chain loyalty, where brand-defined actions, including reviews and resales, can trigger immutable rewards recorded on chain [Keyban docs]. The third is stablecoin payments, positioned alongside DPP and loyalty as a third pillar of the API [Keyban]. Interoperability is a stated design choice: the documentation describes compatibility with multiple blockchain networks [Keyban docs].

The Weavenn collaboration is the clearest external validation of the technology stack: it pairs Keyban's tokenization layer with CEVA's logistics data and Fnac Darty's marketplace surface, with second-hand sales activation cited as an early use case [IMT Starter] [Supply Chain Magazine, 2025].

Data Accuracy: GREEN -- Confirmed via Keyban primary documentation, GitHub, Supply Chain Magazine, and Ecommerce Mag.

Market Research and Opportunity

The market matters now because the European Union's Ecodesign for Sustainable Products Regulation (ESPR) makes Digital Product Passports a phased legal requirement for a widening set of product categories beginning in the second half of the decade [Keyban blog] [Frenchweb].

Keyban operates at the intersection of three adjacent markets: product traceability and DPP issuance, customer loyalty software, and stablecoin payment rails. Qualitatively, the demand drivers visible in the cited material are regulatory (ESPR / DPP), commercial (the resale and circular-economy push at retailers like Fnac Darty), and infrastructural (logistics providers such as CEVA seeking richer item-level data) [Supply Chain Magazine, 2025] [IMT Starter].

Cited claim	Source
Digital Product Passport described as poised to reshape retail and commerce sectors from 2026	[Keyban blog]
Weavenn TPP platform planned launch by Q3 2025	[Supply Chain Magazine, 2025]
Keyban solution responds to new regulatory requirements on personal data management	[Frenchweb]

Data Accuracy: YELLOW -- Regulatory and partnership context is well sourced; quantitative market sizing was not present in captured research and has been intentionally omitted.

Who Else Is Fighting for This

Keyban is positioned as a horizontal tokenization API for commerce, sitting one layer below the brand-facing applications that buyers will eventually choose for DPP, loyalty, and resale, and one layer above the public chains it abstracts.

The competitive map breaks into three segments. First, dedicated DPP and traceability platforms targeting European brands directly with end-to-end applications. Second, general-purpose Web3 wallet-as-a-service and tokenization infrastructure providers. Third, the incumbent PIM, CRM, loyalty, and PSP vendors already embedded in retailer IT stacks.

Where Keyban appears defensible today is in the combination of a France- and EU-native go-to-market, a CTO with a research record in blockchain since 2016 [LinkedIn] [Google Scholar], and an anchor partnership with a Fnac Darty / CEVA joint venture that delivers both a marketplace surface and a logistics data spine [Supply Chain Magazine, 2025]. That partnership is the single largest distribution asset the company has disclosed: it shortens the path to brand pilots that would otherwise require a multi-quarter enterprise sales cycle.

Data Accuracy: YELLOW -- Positioning is supported by Keyban documentation and Supply Chain Magazine; competitor identities were not present in captured research and have been described categorically.

Opportunity

If Keyban executes, the prize is to become the default European tokenization layer underneath the Digital Product Passport, brand loyalty, and stablecoin payments stacks.

Scenario	What happens	Catalyst	Why it's plausible
TPP standard for French retail	Weavenn TPP platform launches and is adopted by additional Fnac Darty categories and third-party brands on the marketplace	Q3 2025 launch executed on schedule [Supply Chain Magazine, 2025]	Fnac Darty's category breadth and CEVA's logistics footprint create a natural multi-brand surface
Embedded loyalty API for EU commerce	On-chain loyalty SDK is adopted by mid-market brands seeking tokenized rewards and resale-linked points	Documented React and JS SDK shipping today [Keyban docs]	Loyalty is already a budgeted line item; Keyban competes as a feature add rather than a new category buy
Tokenization rail for stablecoin commerce	Stablecoin payments pillar matures alongside MiCA-regulated issuers and merchant adoption	Stablecoin payments listed as a homepage pillar [Keyban]	Regulatory clarity in the EU on stablecoins is the most concrete adoption catalyst the category has seen

Data Accuracy: YELLOW -- Scenarios are anchored in confirmed product, partnership, and regulatory facts; valuation framing is explicitly labelled scenario rather than forecast.

Sources

1. [Keyban] Keyban homepage, Commerce Agentique, Digital Product Passport | https://www.keyban.io/
2. [Keyban docs] Introduction | https://docs.keyban.io/
3. [Keyban docs] Keyban React SDK | https://docs.keyban.io/api/sdk-react/
4. [Keyban docs] On-Chain Loyalty | https://docs.keyban.io/solutions/on-chain-loyalty/introduction/
5. [Keyban docs] Supported Blockchains | https://docs.keyban.io/roadmap-and-references/supported-blockchains/
6. [Keyban docs] Roadmap | https://docs.keyban.io/roadmap-and-references/roadmap/
7. [Keyban docs] Embedded Wallet SDK Introduction | https://docs.keyban.io/products/embedded-wallet/introduction/
8. [Keyban blog] Get ready for 2026: the Digital Product Passport | https://www.keyban.io/blog
9. [Keyban blog] Keyban and Weavenn join forces on tokenized DPP | https://www.keyban.io/blog/posts/keyban-and-weavenn-join-forces-to-rework-retail-and-logistics-with-tokenized-digital-product-passport-tpp
10. [Frenchweb] Connaissez vous KEYBAN, et sa solution de gestion de passeports digitaux de produits? | https://www.frenchweb.fr/connaissez-vous-keyban-et-sa-solution-de-gestion-de-passeports-digitaux-de-produits/448124
11. [GitHub] keyban-io organization | https://github.com/keyban-io
12. [Prospeo] Keyban Overview, Address & Contact | https://prospeo.io/c/keyban
13. [My French Startup] Startup KEYBAN, La technologie Web3 pour les entreprises réelles | https://www.myfrenchstartup.com/fr/startup-france/349050/keyban
14. [Crunchbase] Keyban Company Profile & Funding | https://www.crunchbase.com/organization/keyban
15. [Crunchbase] Keyban Financial Details | https://www.crunchbase.com/organization/keyban/financial_details
16. [TechCrunch, September 2015] E-Commerce Feed Management Company Lengow Secures €10M Series B | https://techcrunch.com/2015/09/01/lengow/
17. [LinkedIn] Sebastien Dolard, Keyban | https://www.linkedin.com/in/sebastien-dolard/
18. [LinkedIn] Kei Brousmiche, CTO Keyban | https://www.linkedin.com/in/keibrousmiche/
19. [Les Samouraïs du Business] Episode 725, Charles Kremer, CEO de Keyban | https://open.spotify.com/episode/0WG0Em8OYupocd0ZuxpHAj
20. [Supply Chain Magazine, 2025] Weavenn and Keyban tokenized product passport platform coverage
21. [Ecommerce Mag] Keyban and Weavenn TPP partnership coverage
22. [AccessNewswire, 2026] Pre-Seed funding event coverage