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1- Companies with centralized Identity on the way of decentralization (GAFAM)
- Amazon
- Facebook (Meta)
- Apple
- Microsoft
- Microsoft Entra Verified ID
2- Competing Technology
- A- Ledger Technologies
- Blockchain based
- Sovrin
- Dock
- Chainlink
- uPort (Serto- Veramo)
- ION
- DAG based
- Blockchain based
...
- B- Non-ledger Technologies
- IRMA