Open Source Code for server, application and protocol parts yes no Partly closed no Partly closed yes no yes yes no no

No centralised storage for any part of the User Data All User Data is stored in the Blockchain (decentralised) Operator stores Data of all conversations including images, video and files Operator stores all Data, except "Secret" chats Operator stores Data of all conversations including images, video and files Peer-to-peer, but there are intermediate servers which store undelivered messages Operator is able to log all Data on servers All Data is Stored and Viewed by the operator Peer-to-peer, but there are intermediate servers which store undelivered messages Yes. All data is stored distributed on nodes (2 days) Peer-to-peer, but there are intermediate servers for storing undelivered messages Peer-to-peer, but there are intermediate servers for storing undelivered messages

Developers / Provider is NOT able to block user account yes is Able / Blocking is Able / Blocking is Able / Blocking Is Able Is Able is Able / Blocking Is Able yes Is Able (current time) Is Able

No explicit user identification yes Mobile number is used for authorization Mobile number is used for authorization Mobile number of Facebook account is used for authorization Mobile number is used for authorization Mobile number is used for authorization Mobile number of Facebook account is used for authorization User account creation in the Ring Network yes yes Identification by IP, login, bank data, device

End-to-end encryption (with inability for developers to read user messages) yes There is a potential ability for operator to read all messages There is a potential ability for operator to read all messages There is a potential ability for operator to read all messages yes yes There is a potential ability for operator to read all messages yes yes Declared, but potentially there is the possibility of reading by the developer There is a potential ability for operator to read all messages

No access to address book yes Asks user for access Asks user for access Asks user for access Asks user for access Asks user for access Asks user for access Asks user for access yes yes yes

No access to user location yes Asks user for access Asks user for access Asks user for access Asks user for access yes Asks user for access yes yes yes yes

Does NOT transfer user Private Keys over the network yes Source Code is closed for Review Source Code is closed for Review Source Code is closed for Review Stored encrypted on operator’s servers yes Source Code is closed for Review yes yes Unknown (no source code) Source Code is closed for Review

Does NOT store message history or any other usage information on the user device yes is Storing is Storing is Storing is Storing is Storing Is able to delete messages from both end-users’ devices is Storing yes Unknown (no source code) is Storing

Does NOT disclosure or expose user IP-address yes Exposed to Operator Exposed to Operator Exposed to Operator Exposed to Operator Exposed to Operator Exposed to Operator Directly interacts with Ring Network yes Exposed to Operator (current time) Exposed to Operator

Not able to get statuses like «Message Read» or "User Online" yes All Notifications are Enabled by default You can hide only the "Last Seen" Status You can only switch the "Active" Status yes Asks for user Permission Forced "Message Read" notifications. No Status for user Availability yes yes Forced "Message Read" notifications. No Status for user Availability Asks for user Permission

Does not request access to the microphone yes Optional Optional Optional yes Optional yes Required yes yes Required

Usage cost 0.001 ADM (0.00024 USD) per message Privacy of yourself and your interlocutors Your ID, at least Privacy of yourself and your interlocutors Your ID, at least Your ID, at least Privacy of yourself and your interlocutors Free PoW, energy cost Unknown (no source code) Your privacy and your interlocutors + 43 EUR per year

Spam protection Paid messages, White and Black lists Centralized Centralized Centralized Centralized Centralized Centralized No public addresses PoW, energy cost No public addresses Not known

Delivery of messages 0-5 seconds Less than a second Less than a second Less than a second Less than a second Less than a second Less than a second Less than a second. Messeges can be sent only when the recepient is online. Up to 4 minutes Less than a second (current time) Less than a second