Алтернативи - Certopus

Credly

credly.com

Expiration Reminder

expirationreminder.net

TruScholar

truscholar.io

Sertifier

sertifier.com

Certifier

certifier.io

Accredible

accredible.com

CredSure

credsure.io

Give My Certificate

givemycertificate.com

Virtualbadge

virtualbadge.io

Accredify

accredify.io

NetCredential

netcredential.com