Updated January 31, 2026

TL;DR: Mailtrack works for freelancers who need basic open tracking, but agencies managing dozens of client inboxes hit limits fast. The "Sent with MailSuite" branding looks amateur, per-seat pricing compounds as you scale, and there is no warmup infrastructure. For agencies, Instantly offers unlimited email accounts on a flat fee starting at $47/month, built-in warmup across a 4.2M+ account network, and a Unibox that centralizes replies. RightInbox or Streak work for solo operators. If you manage 10+ inboxes and need to protect sender reputation at scale, Instantly is the upgrade.

Mailtrack is one of the most popular email tracking tools for Gmail, and for good reason. It is dead simple. Install the Chrome extension, send an email, and get a notification when someone opens it. For freelancers or individual salespeople, that is often enough.

The limitations surface when you scale. You cannot manage 30 client inboxes from a Chrome extension overlay. You cannot warm up new domains to protect deliverability. And every email you send on the free plan carries a "Sent with MailSuite" signature that signals to prospects you are using entry-level tools.

If you run an agency or a growing sales team, tracking opens is table stakes. The real question is whether your tracking tool helps or hurts your ability to land in the primary inbox and scale without compounding costs.

This guide compares the top 8 Mailtrack alternatives based on three criteria agency operators care about most: pricing model, unlimited account support, and deliverability infrastructure.

Key terms to know

Why agencies eventually outgrow Mailtrack

Mailtrack's appeal is its simplicity. But simplicity comes with trade-offs that compound as you scale.

The "free tier" trap

Mailtrack's free plan offers unlimited email tracking with real-time notifications and link tracking. That sounds generous until you read the fine print. Every email you send includes a visible "Sent with MailSuite" signature at the bottom.

One reviewer on GetApp put it bluntly:

"It will be visible in the email footnote that the email was sent using MailTracker. It would leave a negative impression on the receiver, and I would delete it totally if I were able to." - Verified user review of Mailtrack

For client-facing outreach, that signature is a dealbreaker. It signals to prospects that you are using free tools, which undercuts any premium positioning your agency tries to maintain.

The per-seat tax

Upgrading to Mailtrack PRO removes the branding, but introduces per-seat pricing at approximately $9.99 per user per month. For a solo founder, that is reasonable. For an agency managing 10 client inboxes, you are looking at roughly $100/month just for tracking. Add more inboxes and that number keeps climbing.

Here is the math that breaks most agencies:

At 10 inboxes, the costs are comparable. At 30+, flat-fee pricing wins decisively.

No unified inbox or deliverability infrastructure

Mailtrack tracks opens. It does not warm up your accounts, rotate IPs, or monitor sender reputation. Managing replies across 30 Gmail tabs creates chaos. You miss responses, lose context switching between accounts, and waste hours on inbox management that should be automated.

For agencies sending thousands of emails across multiple client domains, these gaps matter. One bad domain can tank deliverability for an entire campaign, and Mailtrack offers no tools to prevent or diagnose the problem.

How to choose a tracking tool: Agency vs. individual needs

Not every email tracking tool serves every user. The feature set that works for a freelancer checking if a proposal was opened looks completely different from what an agency needs to run 50+ inboxes across a dozen clients.

What general users need

If you send fewer than 50 emails per day from a single inbox, your priorities are:

• Ease of setup: Install a Chrome extension, authorize Gmail, start tracking
• Free tier: No cost for basic tracking, even with branding
• Read receipts: Simple notifications when emails are opened

Tools like Mailtrack, RightInbox, and Streak cover these needs well.

What agency operators need

If you manage client campaigns across dozens of domains and inboxes, the calculus shifts:

1. Unlimited accounts: Adding inboxes should not increase your software bill
2. Warmup infrastructure: New domains need 30+ days of gradual ramping to earn trust
3. Unified inbox: Managing replies across 30 accounts from separate Gmail tabs is chaos
4. Deliverability monitoring: Blacklist alerts, bounce tracking, and inbox placement tests
5. White-label options: Client portals that look like your brand, not your vendor's

Chrome extensions hit a ceiling here. You need a platform built for scale, not a browser add-on with tracking bolted on.

For a deeper dive on setting up secondary sending domains for scale, see our guide on scaling cold email campaigns with secondary domains.

Top 8 Mailtrack alternatives compared

Before diving into each tool, here is the side-by-side comparison segmented by user type.

Table 1: Pricing and scale

Table 2: Agency features

1. Instantly: Best for agencies requiring unlimited accounts

If you run an agency and your growth depends on cold email, we built Instantly for your economics. The core differentiator is simple: unlimited email accounts on a flat monthly fee.

Pricing breakdown

We start our Email Outreach plans at $47/month for the Growth tier. Most agencies choose Hypergrowth at $97/month, which includes 100,000 emails per month and premium support. Our Light Speed plan at $358/month adds SISR (Server & IP Sharding and Rotation) with dedicated IP pools for agencies running high-volume operations.

Key features for agencies

• Unlimited email accounts and warmup: We include unlimited connected accounts and access to our warmup network of 4.2M+ accounts on every plan. Enable warmup with one click.
• Unibox: We centralize replies from every connected account in one dashboard. No more switching between 30 Gmail tabs.
• Inbox rotation: We distribute sends across accounts automatically to protect individual inbox reputation. Learn more in our inbox rotation guide.
• Link click tracking: Monitor which links recipients click with our Link Clicks Tracker.
• Deliverability optimization: We send emails as text-only to improve inbox placement when HTML triggers spam filters.

What users say

Agency operators consistently highlight the flat-fee model and ease of setup:

"I love how easy Instantly is to set up, which significantly reduces the time I spend managing my B2B email marketing for my AI automation agency. The platform allows me to efficiently get in touch with hundreds, if not thousands, of business owners daily." - Thomas D on G2

"Instantly.ai is honestly one of the best outreach tools I've used. Setup is quick, the interface is super clean, and it just works. Emails send smoothly, deliverability stays high, and the analytics make it easy to tweak campaigns." - Olympus Media Labs on Trustpilot

For a complete walkthrough, check out our full tutorial on YouTube.

Pros and cons

Pros:

• Flat-fee pricing regardless of inbox count
• Warmup infrastructure included on all plans
• Unibox eliminates context-switching
• No forced branding on outgoing emails

Cons:

• Steeper learning curve than a simple Chrome extension
• Requires proper domain authentication setup (SPF, DKIM, DMARC)

2. HubSpot Sales Hub: Best for CRM-heavy workflows

HubSpot Sales Hub is the enterprise choice when your tracking data needs to flow directly into a sophisticated CRM. If your team already runs on HubSpot Marketing Hub or Service Hub, adding Sales Hub creates a unified customer record.

Pricing reality

HubSpot's Sales Hub Professional plan costs $100 per seat per month, plus a mandatory $1,500 onboarding fee. For a 10-person team, you are looking at $1,000/month in ongoing costs before onboarding.

The Enterprise tier climbs to $150 per seat with advanced features like predictive lead scoring and custom objects.

Key features

HubSpot excels at workflow automation tied to email engagement. For example, when a prospect opens your pitch email three times but does not reply, HubSpot can automatically create a task for your AE to call them within 24 hours.

• Deep CRM integration: Email tracking data flows automatically into contact records and deal pipelines
• Workflow automation: Trigger follow-ups, task assignments, and deal stage updates based on email opens or clicks
• Team reporting: Visibility into rep activity and email performance across the organization

Pros and cons

Pros:

• Best-in-class CRM data integration
• Powerful automation for enterprise workflows
• Extensive training and support resources

Cons:

• Per-seat pricing punishes growing teams
• Onboarding fees add thousands in upfront costs
• No warmup or deliverability infrastructure

3. Mixmax: Best for heavy Gmail productivity users

Mixmax positions itself as an email productivity suite rather than a cold email platform. If your team spends most of their day in Gmail coordinating meetings and sending follow-ups, Mixmax adds features that make that workflow faster.

Pricing

Mixmax's SMB plan costs $29 per user per month on annual billing ($34 monthly). The Growth plan at $49/user adds more advanced sequences and integrations.

For 10 users on SMB: approximately $290/month.

Key features

Mixmax focuses on calendar integration and email productivity rather than cold outreach:

• One-click meeting scheduling: Embed your availability directly in emails so prospects can book without back-and-forth
• Shared templates: Team-wide access to proven email copy with performance tracking
• Sequences: Basic automated follow-up sequences

Pros and cons

Pros:

• Excellent calendar integration
• Clean Gmail overlay
• Good for AE productivity workflows

Cons:

• No warmup or deliverability tools
• Per-seat pricing scales poorly
• Not built for high-volume cold email

4. Yesware: Best for enterprise sales teams

Yesware is a legacy player in sales email tracking, focused on enterprise accounts with complex Salesforce integrations.

Pricing

Yesware's Premium plan costs $35 per user per month on annual billing. The Enterprise plan at $65/user adds Salesforce sync and advanced reporting.

For 10 users on Premium: approximately $350/month.

Key features

The Enterprise plan is designed for large, dynamic sales teams deeply integrated with Salesforce CRM.

• Salesforce integration: Bidirectional sync of email activity
• Team templates: Shared library with performance tracking
• Meeting scheduler: Embedded booking links

Pros and cons

Pros:

• Robust Salesforce integration
• Established enterprise support
• Detailed team analytics

Cons:

• Per-seat pricing
• No warmup infrastructure
• Better for warm pipeline than cold outreach

5. Streak: Best for managing deals inside Gmail

Streak takes a different approach by building a full CRM inside your Gmail interface. You never leave your inbox to manage pipelines, track deals, or view contact history.

Pricing

Streak's Pro plan costs $49 per user per month on annual billing ($59 monthly). Pro+ costs $69/user annually or $89/user on monthly billing.

For 10 users on Pro: approximately $490/month.

Key features

Streak CRM is a lightweight CRM system that operates directly within your inbox, designed for individuals, small businesses, and teams working in sales, customer support, and project management.

• Pipeline management in Gmail: Visual deal tracking without switching apps
• Mail merge: Basic personalization for small batches
• Thread sharing: Collaborate on email conversations with teammates

What users say

Streak users appreciate the Gmail-native workflow:

"Streak is incredibly intuitive and helps me manage my sales pipeline without leaving Gmail. The visual pipeline view makes it easy to see where every deal stands." - Verified user review of Streak

Pros and cons

Pros:

• Zero context-switching if you live in Gmail
• Visual pipeline management
• Good for small sales teams

Cons:

• Per-seat pricing
• No warmup or deliverability features
• Chrome extension limits scale

6. GMass: Best for simple mail merges

GMass bridges the gap between Mailtrack's simplicity and a full cold email platform. It connects directly to Google Sheets, making it easy to run personalized campaigns without learning complex software.

Pricing

GMass individual plans start at $29.95/month (or $20.75/month on annual). Team plans start at $145/month for five users.

For 10 users: approximately $290/month on team pricing.

Key features

GMass offers deep integration with Google Sheets, allowing users to easily manage mailing lists and personalize emails with merge fields.

• Google Sheets integration: Pull contact data and personalization fields directly from spreadsheets
• Mail merge: Send personalized emails at scale
• Custom tracking domains: Improve deliverability by using your own domain for tracking pixels

Scale limitations

GMass campaigns are tied to Gmail's daily sending limits. According to Google's support documentation, standard Gmail accounts are limited to 500 emails per day. Google Workspace accounts get higher limits but still cap out below what agencies need for multi-client operations.

Pros and cons

Pros:

• Familiar Google Sheets workflow
• Custom tracking domains available
• Good bridge to more advanced platforms

Cons:

• Gmail sending limits constrain scale
• No warmup infrastructure
• Per-seat pricing on team plans

7. RightInbox: Best for budget-conscious freelancers

RightInbox competes directly with Mailtrack on features and price point. If you just need tracking, scheduling, and reminders without the Mailtrack branding, RightInbox is a solid alternative.

Pricing

RightInbox's Personal plan costs $7.95/month on annual billing. The Professional plan at $14.95/month adds mail merge and sequences.

For 10 users on Professional: approximately $150/month.

Key features

RightInbox is cheaper than many other email productivity tools, making it a cost-effective choice for freelancers and small businesses with seamless Gmail integration.

• Email tracking: Open and click notifications
• Send later: Schedule emails for optimal timing
• Reminders: Get notified if recipients do not respond

What users say

Budget-conscious users appreciate the value:

"RightInbox gives me everything I need for email tracking at a fraction of the cost. The scheduling feature alone saves me hours each week." - Right Inbox on G2

Pros and cons

Pros:

• Lower cost than Mailtrack PRO
• No branding on outgoing emails
• Simple Gmail integration

Cons:

• Per-seat pricing
• No warmup or deliverability tools
• Not built for agency scale

8. Saleshandy: Best for cold email automation with warmup

Saleshandy offers cold email automation with warmup features, positioning between simple trackers like Mailtrack and infrastructure platforms like Instantly.

Key features

Saleshandy provides email sequences, tracking, and warmup capabilities. Unlike some competitors, Saleshandy does offer unlimited email accounts on their cold email plans, though they use tiered pricing based on monthly email volume and prospect limits rather than a flat fee.

• Email sequences: Multi-step follow-up automation
• Warmup: Basic deliverability preparation included
• Tracking: Open and click monitoring
• Unlimited accounts: Connect unlimited email accounts on all cold email plans

Pros and cons

Pros:

• Warmup included
• Sequence automation
• Unlimited email accounts

Cons:

• Monthly email volume limits per tier
• Prospect limits vary by plan
• Less robust deliverability infrastructure than Instantly's 4.2M+ warmup network

How to switch from Mailtrack without losing data

Migrating from Mailtrack to a platform like Instantly is straightforward because Mailtrack does not hold much proprietary data. Your emails live in Gmail. Mailtrack just adds tracking pixels and notifications.

Here is the step-by-step migration path:

1. Disable Mailtrack: Remove the Chrome extension from your browser. Your existing emails remain in Gmail.
2. Connect email accounts to Instantly: Add as many sending mailboxes as you need. We recommend keeping sends at or below 30 emails per inbox per day for optimal deliverability.
3. Enable warmup: Activate warmup on all connected accounts. This runs automatically in the background. Review our warmup filters guide to ensure warmup emails are properly filtered.
4. Set up authentication: Configure SPF, DKIM, and DMARC for your sending domains.
5. Import your contact list: Upload your leads to Instantly. Use personalized lines to customize outreach at scale.
6. Set up reply management: Configure Unibox to centralize responses across all connected accounts.
7. Launch a test campaign: Start with a small batch (50-100 contacts) to verify tracking, deliverability, and reply handling. Review our campaign options guide for setup details.

For a visual walkthrough, watch our step by step tutorial.

Which tracker wins for your growth stage?

The right tool depends on where you are and where you are headed.

Freelancers and solo operators

If you send fewer than 50 emails per day from one inbox, RightInbox or Streak cover your needs at reasonable cost. You get tracking, scheduling, and basic CRM without the complexity of a full platform.

Growing sales teams

If you have 5-15 reps and need tracking plus CRM integration, Mixmax or Yesware offer solid middle-ground options. Be aware that per-seat costs add up as you grow.

Agencies and high-volume senders

If you manage multiple clients, dozens of inboxes, and send thousands of emails weekly, Instantly is the infrastructure upgrade. Unlimited accounts mean your software costs stay flat as you scale. Built-in warmup protects domain health. Unibox eliminates the chaos of managing replies across accounts.

"In just the past 180 days, I've been able to book over 100 meetings, close deals worth more than €15,000, and even walk away from my regular 9 to 5 job, all with the help of Instantly." - Dustin Geissinger Gromicho on G2

Ready to stop paying per seat? Start your Instantly trial and connect unlimited email accounts today

Frequently asked questions about email tracking

Is Mailtrack actually free?

Mailtrack offers a free tier with unlimited tracking, but every email includes a "Sent with MailSuite" signature. Removing that branding requires the PRO plan at approximately $9.99/user/month.

How do I activate email tracking in Gmail?

Install a tracking extension from the Chrome Web Store and authorize it to access your Gmail account. Tracking typically enables automatically when you compose and send emails.

Can I track a Gmail email without the recipient knowing?

Tracking uses an invisible 1x1 pixel that registers when the recipient loads images, but many email clients block images by default. Free tools like Mailtrack display visible signatures, so assume some recipients notice tracking.

Does email tracking hurt deliverability?

It can if implemented poorly. Advanced platforms like Instantly include automated warmup and IP rotation to protect deliverability.

What is the best free email tracker for Gmail?

For purely free tracking without branding concerns, Mailtrack's free tier works. For professional use, most tools require paid plans to remove branding.

How many emails can I send with GMass?

GMass is limited by Gmail's daily sending caps of 500 emails per day for standard accounts. Google Workspace accounts have higher limits but still constrain agency-scale campaigns.

Key terms glossary

Inbox rotation: Distributing sends across multiple connected accounts to protect individual inbox reputation and increase total daily volume.

Warmup network: A pool of real email accounts that exchange messages to build sender reputation for new domains before launching campaigns.

SISR: Server & IP Sharding and Rotation, a feature that assigns dedicated IPs and rotates them automatically to maintain deliverability at scale.

Unibox: A unified inbox feature that centralizes replies from all connected accounts in one dashboard.