Based on our record, Apollo.io seems to be a lot more popular than BibSonomy. While we know about 63 links to Apollo.io, we've tracked only 1 mention of BibSonomy. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Oh, I miss del.icio.us - UI / execution / social discovery, all those fantastic finds... :) I love tagging a lot, but the problem with tagging is that only a handful of software/services use look-up for tag1 AND tag2 (AND tag3...) filtering. It's such a simple concept to filter all used tags based on already selected if I'm making a query using tags. I can not understand how people don't get that without this... - Source: Hacker News / about 2 years ago
Apollo.io seems popular for cold email. Source: 6 months ago
FAAANGM + ATlassian/Uber and similar product based companies 85 lacs - 1.1 cr Startups like coinbase / apollo.io / rippling 80+. Source: 8 months ago
Their data seems pretty good and their features are awesome, but they had a couple of glitches this week that are annoying me. I know they seem to be the best, but has anyone bested them yet? Curious if there's anything out there that's better than Apollo.io. Source: 10 months ago
Tons of options: apollo.io is popular and affordable. If you're looking for recently funded company contact info, saasydb.com is good. Source: 11 months ago
I agree with most people here in that its invaluable. Especially when paired with some other tools like apollo.io and autobound.ai. Source: 11 months ago
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Hunter - Find all the email addresses related to a domain
Qiqqa - Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.
Lusha - Search less. Sell more.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.