Arpit G. Hi, yes, I think LemList charges by LinkedIn seat (I think you could add more email accounts in one seat but don't quote me on that) so multiple seats might get more expensive (or require a higher tier). I'm afraid I don't use clay (I ruled it out for the same reason - seemed unecessarily complicated to get started).
Charlie C. Hi - yes, you can either import from LinkedIn, upload a csv of your own contacts, or use their database of (I think 400m+) people, although you need credits to use their data or to enrich linkedin contacts with email addreses for example.
Hi Arpit. Also worth checking out LemList (I've been using it for about 3 months). Really easy to use for email + linkedin sequences (plus contact databse building and enrichment). Might work out cheaper than clay depending on your requirements.
