Tessio

EU Digital Identity · .NET

The EUDI Wallet,
on your .NET stack.

Tessio builds the verification stack for the EU Digital Identity Wallet — starting with an open-source ASP.NET Core verifier and growing into the managed trust layer that .NET teams will need by December 2027.

See the verifier → What we're building

What we ship

Two layers, one ecosystem. Open-source where the protocol lives. Managed where the operational burden lives.

Open-source verifier

Tessio.Verifier — the .NET-native reference implementation. OpenID4VP 1.0, SD-JWT VC, demo mode included. Apache-2.0.

Go to verifier.tessio.eu →

Managed trust layer

WRPAC registration, 27-state trust-list aggregation, hosted dashboards. The hard parts of taking a verifier to production, run for you.

Available 2027 — get on the list →

EUDI for the .NET ecosystem

A bridge between the EU Digital Identity Wallet and the stacks .NET shops already run. No translating from Kotlin or Rust.

Read the engineering brief →

Why now

Regulation (EU) 2024/1183 mandates that all 27 member states issue a Digital Identity Wallet, and obliges relying parties in regulated sectors to accept it by 6 December 2027.

The reference verifier work happens in Kotlin and Rust. .NET shops — and there are a lot of them in EU public-sector and finance — are left translating. Tessio closes that gap.

Timeline

  1. Now

    Tessio.Verifier 0.1.0 — frozen public contracts published. Implementation in flight across four workstreams.

  2. Q4 2026

    Tessio.Verifier 1.0 — full verification flow, demo mode, sample app. Ready to run against the Commission reference wallet.

  3. 6 Dec 2027

    Mandatory acceptance under Regulation (EU) 2024/1183. .NET-stack relying parties need a verifier in production.

Working on EUDI?

Let's talk.

We're talking to .NET teams running verification pilots, integrators planning 2027 rollout, and member-state authorities looking for an EU-aligned reference stack. If that's you, drop a line.

hello@tessio.eu