Re: What cryptocurrency is solving the scaling problem?

Ripple has a 3 part scalablity approach:

On ledger
Ripple Consensus Ledger Can Sustain 1000 Transactions per Second:
https://ripple.com/xrp-portal/xrp-resources/ripple-consensus-ledger-can-sustain-1000-transactions-per-second/

Payment channels
Escrow, PayChan, and fix1368 Will Be Available in 3 Days:
https://ripple.com/dev-blog/escrow-paychan-fix1368-will-available-3-days/

Quote

PayChan, designed for high volume, low value transactions, flowing in a single direction. The scalability of these transactions is not limited by the Ripple Consensus ledger, and they do not incur the risks typically associated with delayed settlement.

Interledger's fully scalable payments are then settled with Ripple:
https://interledger.org/

Bonus features:

Transactions are typically finalized in under 4 seconds (Ledger Close Interval):
https://charts.ripple.com/#/metrics

The amendments feature allows voting for feature upgrades and upgrades the network instantly:
https://ripple.com/build/amendments/