You cannot sign up for AlphaSense yourself, and it does not publish a price. Its pricing page lists two plans — Market Intelligence and Enterprise Intelligence — with no numbers next to either, saying only that it sells annual subscriptions "ranging from enterprise packages to per-seat options" and asking you to contact its sales team. Expert calls and Canalyst financial models sit beside those plans as separately paid add-ons. Treat any dollar figure you find on a third-party "AlphaSense pricing" page as somebody's guess, because the vendor publishes none.
In practice there are three ways in. Your employer already subscribes and an administrator adds you. Or you are a current student, staff or faculty member at a business school whose library licenses it — Harvard Business School's and Stanford GSB's libraries both list AlphaSense, in each case restricted to their own current members, and Harvard's listing notes expert transcripts cannot be downloaded and that an account includes 25 company-model downloads for its lifetime. Or you fill in the trial request form at alpha-sense.com and wait. We could not see that form's fields without submitting it, so we cannot tell you whether a personal email address is accepted, how long a trial runs, or whether it is granted automatically.
What you will actually be able to read depends on the contract, not on the product. Blocks of source material are switched on per account — AlphaSense calls them "content sets" — and its help centre says real-time research from a given bank needs what it calls an "entitlement," which is permission that follows from your firm having a trading, advisory or coverage relationship with that bank. Older "after-market" research from the same banks does not need one. Two people on the same platform can run the same search and get different results.
The closest honest substitute you can learn on this week is BamSEC — AlphaSense owns it, it is self-serve, it has a free tier, and a paid BamSEC Pro plan above that. It covers US company filings and earnings-call transcripts rather than the licensed bank research and expert interviews.