Utilizing the current Blesta/Authorize Net integrations and PCI compliance.

It appears that Authorize Net offers an Accept.js method that seems similar to stripe.js

From the Authorize Net website:
Accept.js
Replaces: DPM
Requires: API Login ID, Public Client Key, Transaction Key, Authorize.Net API

Use your own custom payment form, while reducing PCI DSS burdens since you never directly handle the data. Directly submit your payment data to Authorize.Net, and receive a temporary token for the actual transaction processing. The Authorize.Net API supports using the temporary token in lieu of actual payment data.

https://support.authorize.net/s/article/Authorize-Net-Integration-Methods-Explained