walt.id

Overview

walt.id, founded in 2021 in Vienna, offers open-source self-sovereign identity infrastructure: wallet, issuer, and verifier components for verifiable credentials and decentralized identifiers. It is one of the more complete open-source stacks in the category, popular with developers who want to own and control their decentralized identity infrastructure rather than depend on a managed black box.

What it is good at

Developer experience, standards coverage, and openness are the strengths. The stack supports DIDs, W3C Verifiable Credentials, OID4VCI and OID4VP, SD-JWT, and EUDI-relevant formats, with libraries and APIs that let teams stand up issuance and verification quickly. Because it is open source, pricing transparency is high and there is no vendor lock-in. Self-hosted and managed deployment options both exist, which suits teams with strict control or residency requirements.

Where it falls short

As infrastructure rather than a finished product, it requires engineering investment to deploy, integrate, and operate, and you own the maintenance burden. Like the category, the surrounding verifier and wallet ecosystem is still maturing, and mainstream IAM concerns (SSO, authorization, lifecycle, governance) are out of scope. Commercial support depends on the managed and enterprise tiers rather than a large support organization.

Pricing

Open-source core is free; managed cloud and enterprise tiers are available, sales-led for the higher plans. Model build-plus-run cost with the TCO calculator.

Best for, and who should look elsewhere

Choose walt.id if you are a developer or team building decentralized identity on open-source tooling you control, especially for EUDI-aligned work. Look elsewhere if you want a fully managed turnkey product or mainstream enterprise IAM. Compare with Spruce ID for another standards-first open stack and Gataca for a packaged EU option, or browse the decentralized identity category.

Bottom line

A strong, transparent open-source toolkit for developers building decentralized identity, provided you have the engineering to run it.