I don’t think that there is a free version. The pricing that I got from them in early 2018 was a minimum of about $500/mo. But you could process a liege number of transactions at that rate.
Yes I think the free Plaid tier might work for individual installations. After successful bank login through Plaid, I’m now getting a new error in ERPNext:
Traceback (most recent call last):
File "/home/frappe/frappe-bench/apps/frappe/frappe/app.py", line 61, in application
response = frappe.handler.handle()
File "/home/frappe/frappe-bench/apps/frappe/frappe/handler.py", line 21, in handle
data = execute_cmd(cmd)
File "/home/frappe/frappe-bench/apps/frappe/frappe/handler.py", line 56, in execute_cmd
return frappe.call(method, **frappe.form_dict)
File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 1036, in call
return fn(*args, **newargs)
File "/home/frappe/frappe-bench/apps/erpnext/erpnext/erpnext_integrations/doctype/plaid_settings/plaid_settings.py", line 59, in add_bank_accounts
for account in response["accounts"]:
TypeError: string indices must be integers