Vocus does it's job. I improved my outreach process a lot with Vocus
GetNotify might be a bit more popular than Vocus.io. We know about 1 link to it since March 2021 and only 1 link to Vocus.io. 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.
Try vocus.io I love it for both reminders back to your inbox as well as auto-follow ups if no response. Source: over 2 years ago
Oh, btw, as a Landlord I sometimes find tenants simply can't be bothered collecting their deposits (I sent an email reminder, which I know he opened as I used getnotify.com, and never heard from him). Source: over 2 years ago
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
ReadNotify - ReadNotify enables the user to know when email is sent and the reciever reads the email.
HEY - Email at its best, new from Basecamp.
Bananatag - Find out what happens to your emails after you press send! Add email tracking, attachment tracking, email scheduling and templates to your daily emails.
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Intelliverse Email Tracker - Intelliverse Email Tracker provides insights to increase the productivity of your emails.