From something I saw in Facebook recently:
Q: Will NextBio do away with PubMed?
A: Absolutely not. In order to even have a chance at making PubMed irrelevant, a 3rd-party tool would have to be free. I believe I have played with the vast majority of 3rd-party PubMed/MEDLINE tools available (see this post category for details).
Q: …will Pubget do away with PubMed?
A: In some libraries for some users, PubGet will be a the preferred option. Will it make PubMed irrelevant? Good lord, no.
Suspect they use PubMed to get their lit content, esp since they say they include all the full text from PubMed Central.
K is absolutely right. Both PubGet and NextBio get their data through NCBI API tools.
However, PubMed makes the index of the world’s medical literature available to millions and it used worldwide as an essential healthcare tool. Ask yourself: Do you want to trust a private corporation to take good and ethical care of such an important public good? I don’t. I’d rather trust the NLM.