
Yes, you can request a Professional trial. See https://www.onshape.com/en/pricing for information.

The Professional subscription allows users to create private documents and also use Onshape's release management workflow. Otherwise, the Free subscription includes all of the same CAD and data management functionality as the Professional subscription.
With the Professional subscription you can create as many private documents as you like. No Onshape users have any access to your private documents unless you specify who, and what type of access, is allowed.
With the Free subscription you are unable to create any private documents. All of your documents will be public to all Onshape users. No Onshape user has the ability to edit your public documents, but they are able to view or make copies of your documents. You can share your public documents as you would a private document, and specify who, and what type of access, is allowed. Please read our Terms of Service for more details.

The Professional and Standard subscriptions mainly differ in that Professional is geared towards users who need and want company-wide features like: Release management, company-wide metadata, company-wide material libraries, and company-based sharing features. Both subscriptions allow users to create unlimited private documents and include all the same CAD functionality.

No, Onshape never stores your credit card information.

You can your credit card and other payment information through the My account option on the User menu located in the drop down of your user name in the user interface. Select Payment options in the left pane to access your Onshape payment information.

Your credit card is charged when you sign up for a subscription, when you add users to your subscription, and at the beginning of every payment cycle.

Declines happen for a variety of reasons, and in many cases only your card-issuing bank is able to tell you definitively why your attempted charge was declined. Banks use automated systems to determine whether or not to accept a charge. These automated systems may take various pieces of data into account, such as your spending patterns, account balance, and card-specific information like the expiration date and CVC.
It may be that you entered one of the required pieces of information incorrectly or perhaps the decline was the result of a fraud protection program. Please contact your card-issuing bank for more information; and if the problem persists, feel free to contact us.

You can change your Onshape subscription to a Free subscription at any time, for as long as you like. Any private documents you created and those shared with you remain available and in View-only mode.
Your Professional subscription remains active for the duration of the payment period, and you are converted to a Free subscription at the conclusion of the active payment period.
Exceptions to this include:
- If you belong to more than one Professional subscription, being removed from one subscription means you are still on the other Professional subscription so you are not downgraded to the Free subscription in this case.
- If you belong to a Professional company subscription, you must request to be removed by the company owner. Upon removal from the company, you are immediately downgraded to Free unless you are a member of another Professional subscription.

No, your subscription becomes transitioned to Free at the end of the current payment cycle. The exception to this is if you are being removed from a Professional subscription that is your only Professional subscription. In this case you are immediately downgraded to Free.

You can change your Onshape subscription to a Free subscription at any time, for as long as you like. Any private documents you created and those shared with you remain available and in View-only mode.

Yes, sign up for a Professional subscription to pay for multiple users and create a company account. When you sign up for this subscription, you designate a company owner. Once the sign-up process is completed, the company owner adds company members to the subscription through the Account page in the user interface.

If you add users to your account who are already part of a Professional subscription, you are agreeing to pay for them as well. Users may belong to more than one subscription, but not a Free subscription and a Professional subscription at the same time with the same account. If a user wishes to have a Free subscription and also be part of a paid subscription, they must use two separate Onshape accounts (indicated by different email addresses when they sign up).

Nothing happens to your documents. If your Onshape account is not associated with any other Professional subscription, then you are downgraded to a Free subscription. Onshape never deletes your documents and never makes your private documents public.