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by RoastBeats 3693 days ago
I use Streak (a YC company, I believe), which has email open tracking built in. It's meh... gets the job done, I guess, but it's not really their focus. I definitely use it more for the CRM component.

Haven't heard of RocketBolt. I'll check that out.

I think Hubspot has something. Was it called Sidekick? I can't find anything about it anymore.