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

Funny to see this question as I had actually just the same question 24 hours ago. For a small side project (see https://umbrellatoday.app if interested), I need to send emails to warn users to bring an umbrella when stepping outdoors. As such, I cannot risk the email not getting delivered, and my users getting wet. I came across this alternative to Sendgrid, which was easy to setup and works like a charm. Updating... - Source: Hacker News / over 2 years ago

Mailazy.com — Mailazy is the only simple transactional email service you’ll need. 15,000 emails/month free forever (500 emails/day sending limit). - Source: dev.to / almost 3 years ago