Best Sales Email Tracking Software in 2026
Updated
In short: Mailbutler Smart Assistant is ranked #1 of 27 as of 8 October 2026, ahead of Boomerang and Mixmax. The best-ranked option with a free plan is Boomerang. The lowest first paid tier on this page is Mailcastr at $0.42/mo.
When a sales email is sent, tracking tools can show whether it was opened, clicked, or answered, helping you decide what to follow up on. Compared on open, click, reply, and attachment tracking, these options also vary in real-time alerts and CRM synchronization. Check email client support alongside free-plan availability and paid-from pricing to weigh fit with your workflow and budget. Mailbutler Smart Assistant, Boomerang, and Mixmax are among the named options to consider. Think about which engagement signals are useful to your sales process and how closely a tool should connect to the email client and CRM you already use.
27 sales email tracking software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
12 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | Mailbutler Smart AssistantWeb · Windows · Mac · Linux · Android · iPhone · Extension | Three bars | — | 6 of 6 | $7/mo | 6.8 | |
| 2 | BoomerangWindows · Mac · Android · iPhone · Extension | Three bars | — | 4 of 6 | $4.98/mo | 6.6 | |
| 3 | MixmaxWeb · Windows · Mac · Linux · API · Extension | Three bars | — | 4 of 6 | $29/mo | 6.6 | |
| 4 | MailcastrWeb · Android · iPhone · Extension | Three bars | — | 3 of 6 | $0.42/mo | 6.5 | |
| 5 | MailsuiteWeb · Android · iPhone · Extension | Three bars | — | 3 of 6 | $6.99/mo | 6.5 | |
| 6 | Right InboxWeb · Mac · Extension | Two bars | — | 2 of 6 | $7.95/mo | 6.5 | |
| 7 | StreakWeb · Android · iPhone | Three bars | — | 3 of 6 | $59/mo | 6.5 | |
| 8 | Trustifi Email TrackingWeb · Windows · Mac · Extension | Three bars | — | 3 of 6 | Free | 6.5 | |
| 9 | YeswareWeb · Windows · Mac · Extension | Three bars | — | 3 of 6 | $19/mo | 6.5 | |
| 10 | LeadBoxerWeb · API | Two bars | — | 1 of 6 | €8.25/mo | 6.4 | |
| 11 | TrackMailBoxWeb · Extension | Two bars | — | 1 of 6 | Free | 6.4 | |
| 12 | WhoReadMeWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 13 | SalesloftWeb · Android · iPhone · API · Extension | Two bars | — | — | 3 of 6 | — | 5.5 |
| 14 | Mail Track for GmailWeb · Android · iPhone | One bar | — | — | 3 of 6 | — | 5.3 |
| 15 | PointofmailWeb · Windows · Mac · Android · iPhone · API · Extension | Two bars | — | — | 5 of 6 | $1.17/mo | 5.3 |
| 16 | RevenueGridWeb · Windows · Mac · Android · iPhone · Self-hosted · Extension | Two bars | — | — | 5 of 6 | $30/mo | 5.3 |
| 17 | Email TrackerWeb | One bar | — | — | 1 of 6 | — | 5.2 |
| 18 | MailTagWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 19 | OutsolviWeb · Windows · Mac · Extension | Two bars | — | — | 3 of 6 | $7/mo | 5.2 |
| 20 | EmailCaddieWeb · Windows | One bar | — | — | 2 of 6 | $10/mo | 5.1 |
| 21 | MailTrackerNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 22 | FollowUp.ccWeb · Extension | One bar | — | — | 1 of 6 | $18/mo | 5.0 |
| 23 | DidTheyReadItWindows · Mac | No signal | — | — | 2 of 6 | — | 4.9 |
| 24 | ReadNotifyWeb · Windows · Mac | One bar | — | — | 3 of 6 | — | 4.9 |
| 25 | SellizerWeb | One bar | — | — | 1 of 6 | — | 4.9 |
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Email client support | Open tracking |
|---|---|---|---|---|---|---|---|---|
| 1 | Mailbutler Smart Assistant | 6.8 | Free plan | $7/mo | Yes | 4 /user/mo | — | — |
| 2 | Boomerang | 6.6 | Free plan | $4.98/mo | Yes | 4.98 /user/mo | gmail_and_outlook | Yes |
| 3 | Mixmax | 6.6 | Free plan | $29/mo | Yes | 29 /user/mo | — | — |
| 4 | Mailcastr | 6.5 | Free plan | $0.42/mo | Yes | — | gmail | Yes |
| 5 | Mailsuite | 6.5 | Free plan | $6.99/mo | Yes | — | gmail_and_outlook | Yes |
| 6 | Right Inbox | 6.5 | Free plan | $7.95/mo | Yes | 7.95 /user/mo | gmail | Yes |
| 7 | Streak | 6.5 | Free plan | $59/mo | Yes | 49 /user/mo | — | — |
| 8 | Trustifi Email Tracking | 6.5 | Free plan | Free | Yes | — | gmail_and_outlook | Yes |
| 9 | Yesware | 6.5 | Free plan | $19/mo | Yes | 15 /user/mo | — | — |
| 10 | LeadBoxer | 6.4 | Free plan | €8.25/mo | Yes | — | gmail_and_outlook | Yes |
| 11 | TrackMailBox | 6.4 | Free plan | Free | Yes | — | gmail | Yes |
| 12 | WhoReadMe | 6.4 | Free plan | Free | Yes | — | gmail_and_outlook | Yes |
| 13 | Salesloft | 5.5 | No | — | — | — | — | — |
| 14 | Mail Track for Gmail | 5.3 | No | — | Yes | — | gmail | Yes |
| 15 | Pointofmail | 5.3 | No | $1.17/mo | No | — | gmail_and_outlook | Yes |
| 16 | RevenueGrid | 5.3 | No | $30/mo | No | 30 /user/mo | gmail_and_outlook | Yes |
| 17 | Email Tracker | 5.2 | No | — | — | 6.9 /user/mo | gmail | Yes |
| 18 | MailTag | 5.2 | No | — | — | — | gmail | Yes |
| 19 | Outsolvi | 5.2 | No | $7/mo | No | 7 /user/mo | gmail_and_outlook | Yes |
| 20 | EmailCaddie | 5.1 | No | $10/mo | No | — | outlook | Yes |
| 21 | MailTracker | 5.1 | No | — | Yes | — | gmail | Yes |
| 22 | FollowUp.cc | 5.0 | No | $18/mo | No | 18 /user/mo | gmail | Yes |
| 23 | DidTheyReadIt | 4.9 | No | — | No | — | gmail_and_outlook | Yes |
| 24 | ReadNotify | 4.9 | No | — | No | — | gmail_and_outlook | Yes |
| 25 | Sellizer | 4.9 | No | — | No | — | gmail_and_outlook | Yes |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which sales email tracking software is ranked first on Freedom251?
Mailbutler Smart Assistant is ranked #1 of 27 with a score of 6.8. Boomerang is second and Mixmax third.
How many of these have a free plan?
12 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Mailcastr has the lowest first paid tier we found: $0.42/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.