This deal came along at the perfect time for me since I'm in the middle of an aggressive cold email campaign. I was starting out with a fairly old list that I had verified using clearout. Yet, I was still getting a significant number of bounces.

There are certainly a few teething problems with the platform, but what does one expect on a new project such as this. In that respect we need to grade ZeroIn on a curve:

Support 5/5
Current workflow: 2/5
Reliability: 3/5
Accuracy: 4/5
Value for Money: 5/5

Overall: 5/5 < why 5/5 and not 3.8/5? because I actually would not buy an AppSumo deal that only had 4 tacos, but I recommend that you do buy this. So the rating is not to say it is 100% perfect but to say that if you do a lot of email prospecting and have had trouble finding accurate, bounceless email data at scale then you should 100% buy this.

🙏 A couple of massive time savers would be allowing users to verify more than 1000 leads at a time and find more than 100 emails at a time. I understand why the system has these limits, but these limits should be hidden from the user for optimal UX. For instance, if I want to send 2,000 emails to the "find email queue", instead of forcing me to send them 100 at a time. The tool should take the request and split it into manageable batches behind the scenes. I really don't care how long it takes, I just don't want to be the one doing a bunch of repetitive clicking!

🙏 Would be good to have the option to go beyond 3 pages (especially those of us with sales navigator accounts) Going beyond 3 pages would save a TON of time and you can use a similar randomisation algorithm to LinkedHelper for keeping things safe behind the scenes. Especially if there was a way to set it to pull 400 leads every 24 hours to keep things safe.

⚠️ There's a filtering issue that I'm hoping to hear from the tech team about. Basically, it doesn't differentiate between 'not verified' (yet) and 'no email' which when combined with the fact that you can't bulk verify a list of emails, makes it very time consuming to verify lists with 1000+ emails.

⚠️ I ran a test with mostly 100% emails but also mixed in about 300 85%+ confidence emails. What I have discovered is that at 85% confidence, you will still encounter emails with verification errors like this:
- NoMxRecord:0-0
- Invalid:451-ErrorInProcessing
- 550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [P3WB8F78NG-O82mdysai_w.us519]

⚠️The "100%" emails are not really 100%, they don't "bounce" but they do sometimes return these errors:

- Remote Server returned '550 5.1.1 RESOLVER.ADR.RecipNotFound; not found'

I do not believe such errors affect your sending reputation but your milage ay vary.

Again, this is great value. I recently spent the price of 2 codes cleaning an email list with Clearout and it did not do as good a job as ZeroIn. So far it has truly been a zero-bounce solution.