Mailbutler Smart Assistant adds AI writing and email-management tools to Apple Mail, Microsoft Outlook, and Gmail.
Alternatives to ReadNotify
ReadNotify is built for senders who need more than a basic open signal. It reports when tracked messages are opened, how long they are read, and whether they are forwarded or reopened. It also provides digitally signed posting and opening proofs, tracks Office documents and PDFs, and can include recipient details such as approximate location, IP address, software, and language. Its retractable, self-destructing, and ensured-receipt messages add controls around delivery. A…
Boomerang for Gmail helps users manage message timing, follow-ups, and meeting scheduling.
LeadBoxer is a B2B signals platform for identifying, qualifying, and managing leads.
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Mixmax
Mixmax is a sales engagement platform for revenue teams that works inside Gmail and Outlook.
Free planWebAPIExtensionLinux8.1From $29 a month - 5

Mail Track for Gmail
Mail Track for Gmail adds open tracking and read receipts to messages sent through Gmail.
Free planAndroidiOSWebExtension8.0From $2.99 a month - 6

Right Inbox
Right Inbox is a Gmail productivity tool for tracking, scheduling, and automating email.
Free planWebExtensionLinuxmacOS7.9From $9.95 a month - 7

RevenueGrid
RevenueGrid is a revenue intelligence platform that captures customer interactions and syncs them with a CRM.
AndroidiOSWebExtension7.4From $30 a month - 8

Streak
Free planAndroidiOSWeb7.4From $59 a month - 9

Yesware
Yesware is a sales engagement platform that brings email tracking, templates, and automated outreach into Gmail and Outlook.
Free planWebExtensionmacOSWindows7.3From $19 a month - 10
DidTheyReadIt
DidTheyReadIt is an email tracking service that notifies senders when a tracked message is opened.
Free planWebExtensionmacOSWindows7.1Free plan - 11

Mailcastr
Free planAndroidiOSWebExtension7.1From $5 a year - 12

Mailsuite
Mailsuite brings email tracking, campaign sending, mail merge, CRM tools, document sharing, and PDF signature requests into an email-focused suite.
Free planAndroidiOSWebExtension7.1From $6.99 a month - 13

Salesloft
Salesloft describes its product as a predictive revenue system that turns signals across a company's revenue stack into prioritized actions for revenue teams.
AndroidiOSWebAPI7.0 - 14
Pointofmail
Pointofmail tracks sent email and offers controls for managing messages after they are sent.
AndroidiOSWebAPI6.9From $13.99 a month - 156.8From $79 a year
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MailTracker
MailTracker is a Gmail email-tracking service delivered through a Chrome extension, with a web platform also listed.
Free planWebExtension6.8From $29.99 a month - 17

Outsolvi
Outsolvi provides confidence-scored email open tracking across Outlook and Gmail for account executives.
WebExtensionmacOSWindows6.7From $84 a year - 18
WhoReadMe
WhoReadMe is a free online service that tracks sent emails and notifies the sender when a tracked message is opened.
Free planWeb6.6Free plan - 19

Outreach
Outreach is a revenue-team platform that brings prospect engagement, customer retention, coaching, and revenue intelligence into one system.
AndroidiOSWebAPI6.5 - 20

EmailCaddie
EmailCaddie tracks Outlook email activity so users can follow up based on opens, clicks and replies.
WebWindows6.4From $10 a month - 21

FollowUp.cc
FollowUp.cc is a web service and browser extension for managing email reminders, scheduled messages, and sales follow-ups.
WebExtension6.3From $18 a month - 22
Trustifi Email Tracking
Trustifi Email Tracking adds pixel-based open notifications and analytics to email.
Free planWebExtensionmacOSWindows6.3Free plan - 23
Email Tracker
Email Tracker is a Gmail-integrated web service and browser extension that reports when messages are opened, where they were opened, and whether the…
WebExtension6.1From €6.90 a month - 24

TrackMailBox
TrackMailBox is a free Chrome extension for Gmail that tracks email opens and link clicks.
Free planWebExtension6.1Free plan - 25

Vocus.io
Extension6.1From $5 a month - 26
Sellizer
Web4.9

