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Best email tracking tools (2026): what to track, and what to ignore

Email tracking tools tell you when a prospect opens an email, clicks a link, or replies. For sales teams the useful signals today are replies and clicks. Open tracking has become unreliable because Apple Mail preloads tracking pixels whether or not someone reads the email, and cold email vendors now recommend turning it off to protect deliverability.

Below is how OneGTM tracks email for clients, then the other email tracking tools worth knowing for one-to-one sales email and outbound campaigns, with pricing from each vendor.

By Garrett Wolfe, founder of OneGTM (Clay Artisan Solutions Partner) and former GTM engineer at Unify. Updated .

Key takeaways

  • Track replies and meetings first. They are the only email metrics that reliably mean interest.
  • Open rates are inflated by Apple Mail Privacy Protection, so treat them as a rough trend at best.
  • For cold email we turn open tracking off and use click tracking sparingly, as Instantly and lemlist both recommend.
  • For one-to-one rep email, HubSpot's free tracking covers most teams before a paid tool is needed.

How OneGTM tracks email

We track campaigns inside the sending platform and one-to-one rep email inside the CRM, and we report on replies and meetings rather than opens.

Instantly

OneGTM uses this

Tracks replies, auto-replies, link clicks, and opens per campaign, with a global setting to disable open tracking for deliverability. We run cold email here with opens off.

Best for: Cold email campaigns at volume

Pricing: Outreach from $47/month, or $37.60/month billed annually; free trial.

HubSpot Sales Hub

OneGTM uses this

Tracks opens, clicks, and document views on one-to-one emails from Gmail or Outlook, with real-time notifications and activity logged to the contact record.

Best for: Rep email logged to the CRM

Pricing: Tracking included in HubSpot's free tools; paid Sales Hub from $9/seat/month billed annually.

Other email tracking tools worth knowing

Inbox add-ons for individual reps come first, then sales engagement platforms, then cold email tools with tracking built in.

Mailtrack (Mailsuite)

Gmail extension that tracks opens, link clicks, and PDF opens. Mailtrack is now part of Mailsuite.

Best for: Individuals tracking Gmail

Pricing: Free plan; Mailtrack $6.99/user/month; Mailsuite $19.99/user/month.

Yesware

Tracks opens, clicks, and attachment views in Gmail and Outlook, with templates and simple campaigns.

Best for: Reps who live in Outlook or Gmail

Pricing: Free plan; Pro $15/seat/month billed annually; 14-day trial.

Mixmax

Gmail add-on with open and click tracking, scheduling, templates, and sequences.

Best for: Gmail-based sales teams

Pricing: Free plan with 20 tracked emails; paid from $29/user/month billed annually.

Streak

CRM inside Gmail with email view and link tracking, pipelines, and mail merge.

Best for: Small teams that want a CRM inside Gmail

Pricing: Free plan with tracking; Pro $49/user/month billed annually.

Superhuman

Fast email client with read statuses showing when and on which device recipients opened.

Best for: Individual executives and founders

Pricing: Mail with read statuses from the Business plan, $33/member/month billed annually.

Close

Sales CRM with built-in email, calling, and email open tracking in the CRM inbox.

Best for: Small inside sales teams

Pricing: Solo $9/user/month billed annually; free trial.

Outreach

Enterprise sales engagement platform that tracks opens, clicks, and replies across sequences.

Best for: Large sales teams running sequences

Pricing: Not published; custom pricing.

Salesloft

Sales engagement platform with view, click, and reply tracking across cadences.

Best for: Enterprise sales teams

Pricing: Not published; contact sales.

Saleshandy

Cold email platform that tracks opens, clicks, and replies, plus one-to-one email tracking.

Best for: Budget cold email with tracking

Pricing: Starter $34/month billed annually; 7-day free trial.

GMass

Mail merge and campaigns from Gmail with open, click, reply, and bounce tracking.

Best for: Campaigns sent straight from Gmail

Pricing: Standard $29.95/month, or $20/month billed annually.

lemlist

Multichannel outreach with toggles for open and click tracking. Its own help center recommends turning both off for cold campaigns.

Best for: Multichannel cold outreach

Pricing: Email plan $69/month, or $55/month billed yearly.

Smartlead

Cold email platform with open, click, and reply tracking across unlimited mailboxes.

Best for: Agencies running many mailboxes

Pricing: Base $39/month; free trial.

Prices are from each vendor's site as of October 2026 and change often, so check before you buy. This is an opinionated list, not a paid ranking.

Email tracking tools compared

ToolBest forStarting price
Instantly (OneGTM uses)Cold email campaigns at volumeOutreach from $47/month, or $37.60/month billed annually
HubSpot Sales Hub (OneGTM uses)Rep email logged to the CRMFree tools include tracking
Mailtrack (Mailsuite)Individuals tracking GmailFree plan
YeswareReps who live in Outlook or GmailFree plan
MixmaxGmail-based sales teamsFree plan with 20 tracked emails
StreakSmall teams that want a CRM inside GmailFree plan with tracking
SuperhumanIndividual executives and foundersMail with read statuses from the Business plan, $33/member/month billed annually
CloseSmall inside sales teamsSolo $9/user/month billed annually
OutreachLarge sales teams running sequencesNot published
SalesloftEnterprise sales teamsNot published
SaleshandyBudget cold email with trackingStarter $34/month billed annually
GMassCampaigns sent straight from GmailStandard $29.95/month, or $20/month billed annually
lemlistMultichannel cold outreachEmail plan $69/month, or $55/month billed yearly
SmartleadAgencies running many mailboxesBase $39/month

Starting prices as published by each vendor in October 2026.

Why open rates mislead now

Open tracking works by loading a tiny invisible image when the email is displayed. Since iOS 15, Apple's Mail Privacy Protection downloads that remote content in the background when a message is received, not when it is read, so Apple Mail users show as opens whether or not they looked. Apple says so on its Mail privacy support page. The same page notes that the protection does not cover links, so clicks still mean someone acted.

Image blocking in other clients undercounts opens in the opposite direction. The result is that open rate is no longer a reliable read on interest or on subject line performance.

Should you track opens in cold email?

Usually not. Tracking pixels and rewritten tracking links add markup that spam filters notice, and both Instantly and lemlist now document options or advice to disable open tracking to improve deliverability. For cold email we turn opens off, leave click tracking off unless a link is central to the campaign, and judge results on replies, positive replies, and meetings booked.

Keep the rest of your setup in line with Google's sender guidelines: authenticated domains, easy unsubscribes, and low spam complaint rates. Our free deliverability checker tests the DNS side.

What to track instead

  • Reply rate and positive reply rate per campaign and per mailbox.
  • Meetings booked and the opportunities they turn into.
  • Bounce rate, kept under about 2 percent. See bounce rate.
  • Inbox placement from seed tests. See email warmup tools.
  • Clicks only when a link is the point of the email, such as a case study or calendar.

When it makes sense to get help

Picking a tracking tool is easy. Knowing what the numbers mean is harder, and many teams optimize subject lines for open rates that Apple inflated, while deliverability quietly slips. OneGTM sets up sending infrastructure, reporting on replies and meetings, and alerts when placement drops, so you see what is really working.

  • Open rates look fine but replies and meetings have dropped.
  • You are not sure whether tracking is hurting your deliverability.
  • Campaign reporting does not connect to pipeline in the CRM.

Book a deliverability review

Email tracking tools FAQ

What is the best email tracking tool?
For one-to-one sales email, HubSpot's free email tracking covers most teams, and Mailtrack, Yesware, Mixmax, and Streak are good inbox add-ons. For cold email campaigns, use the tracking built into your sending platform, such as Instantly, Smartlead, or lemlist, and focus on replies rather than opens.
Are email open rates accurate?
Not very. Apple Mail Privacy Protection preloads tracking pixels when an email is received, so Apple Mail users can register as opens without reading, while clients that block images undercount. Treat open rate as a rough trend and rely on replies and clicks.
Does email tracking hurt deliverability?
It can, especially for cold email. Tracking pixels and rewritten links add patterns spam filters look for. Instantly offers a setting to disable open tracking to improve deliverability, and lemlist recommends turning off open and click tracking in cold campaigns.
Can I track emails for free?
Yes. HubSpot's free tools, Mailtrack's free plan, Yesware's free plan, and Streak's free plan all include basic email tracking, with limits on features or volume.
What should I track instead of opens?
Track replies, positive replies, meetings booked, bounce rate, and inbox placement. Clicks are useful when a link is central to the email.
What email tracking does OneGTM use?
OneGTM runs cold email in Instantly with open tracking turned off and reports on replies and meetings, and logs one-to-one rep email in the client's CRM, often HubSpot.

Want reporting that ties email to pipeline?

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