What are the best email tracking software?

The **best email tracking software** depends on your email platform and whether you want a simple open-tracker or a broader sales tool. Based on the 2026 comparison results, the strongest overall picks are **Salesflare CRM**, **HubSpot Sales Hub**, **Mailbutler**, and **Mailtrack/Mailsuite**.[1]

Here’s a practical shortlist:

| Tool | Best for | Notable strength |

|---|---|---|

| **Salesflare CRM** | Sales teams needing CRM + tracking | Ranked #1 in the comparison.[1] |

| **HubSpot Sales Hub** | Teams wanting an all-in-one sales stack | Ranked #2 in the comparison.[1] |

| **Mailbutler** | Apple Mail / productivity-focused users | Ranked #3 in the comparison.[1][6] |

| **Mailtrack / Mailsuite** | Simple Gmail tracking | Very popular and positioned as a free, unlimited Gmail tracker.[1][2][5] |

| **Snov.io Email Tracker** | Sales outreach | Ranked among the top options.[1] |

| **Streak CRM** | Gmail users who want CRM inside inbox | Included in the top 7.[1] |

| **MailTracker by Hunter** | Lightweight tracking | Included in the top 7.[1] |

| **Yesware** | Gmail and Outlook sales teams | Markets itself as email tracking for Gmail and Outlook.[7] |

If you want the **best overall**, the comparison source ranks **Salesflare CRM** first.[1] If you want the **simplest free tracker**, **Mailtrack/Mailsuite** is the most prominent Gmail-focused option in the results and is described as free and unlimited.[2][5]

A quick way to choose:

- **Best overall sales tracking + CRM:** Salesflare CRM.[1]

- **Best for established sales teams:** HubSpot Sales Hub.[1]

- **Best for Apple Mail:** Mailbutler.[1][6]

- **Best for simple Gmail tracking:** Mailtrack/Mailsuite.[2][5]

- **Best for Gmail + Outlook sales tracking:** Yesware.[7]

If you want, I can also narrow this down by **free vs paid**, **Gmail vs Outlook**, or **best for sales teams vs personal use**.