Alternatives to Free Email Blockchain Timestamping for GMail

Comparable listings

1. MailStone Gmail Extension Describes nearly the same job, smaller audience 17 users
2. i2Chain Chrome extension for Gmail Describes nearly the same job, smaller audience 6 users ★ 5.0
3. Chrome Blockchain Signer Describes nearly the same job, smaller audience 8 users ★ 5.0
4. GetProofAnchor Describes nearly the same job, smaller audience 18 users ★ 5.0
5. OTRUST - Blockchain Timestamp Describes nearly the same job, smaller audience 2 users
6. InfoNotary Browser Signer Describes nearly the same job, smaller audience 1k users
7. PostStamper Describes nearly the same job, smaller audience 3 users
8. Swiss Trust Layer Describes nearly the same job, smaller audience 4 users (last published figure)

Comparable listings are pre-computed from the meaning of each store listing, then shown with the audience and rating from our latest pass over the store.