Catenis Flow 3.0.2 supports off-chain transaction messages, SegWit and drag-and-drop capabilities.

Starter Plan
From: $35.75 / month
The Catenis starter plan uses the bitcoin testnet on the sandbox environment and is the perfect choice to build and test blockchain enabled applications such a prototypes, minimal viable products and integrate existing products prior to deploying to the production blockchain.
**If you own BCOT Tokens you can use them to fund your account directly to receive Catenis Service Credits