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Not sure if this helps, though check these: • Cart Whisperer Campaign by Verisign • Grasshopper's viral re-brand campaign However, these campaigns are not direct product promotion as you expect. Brand promotion has more viral potential than direct product promotion in B2B. Another case study you can check is, though not pure B2B: • Hotmail's successful email signature campaign This is one of the very first viral campaigns. If you can add more context to your search, I can suggest more. • Are you looking for B2B SaaS viral companies/products? • What do you mean by "big asset"?

RocketLane did a rap video to announce their fundraise. 💥

So we had a brand relaunch and looking to promote it aggressively online. Need a hero content as the base and then revolve around it. Hero content has to be a big asset like webinar, roundtable etc or even an asset is fine. Thanks for the suggestions, will check it out @Jagsir Smiles