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Head-to-head · Sales Email Tracking Software

Vocus.io vs Mailbutler Smart Assistant

  • Updated Oct 2026
  • Both researched from official sources
  • 8 checks side by side
Higher score Vocus.io #5 in Sales Email Tracking Software 8.8/10 30-day trial Free trial✓ 5 of 6 features Visit Vocus.io
Mailbutler Smart Assistant #8 in Sales Email Tracking Software 8.4/10 Free plan · 14-day trial Free planFree trial✓ 0 of 6 features Visit Mailbutler

Vocus.io leads on 1 check, Mailbutler Smart Assistant on 1, and 6 are even. Who comes out ahead on the 8 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreVocus.io · 8.8/10
  • Lowest starting priceVocus.io · $5/user/mo
  • Free planonly Mailbutler Smart Assistant
  • Free trialboth
  • Most featuresVocus.io · 5 of 6

Vocus.io scores higher on our rubric for sales email tracking software: 8.8 against 8.4 out of 10; our editors rank them #5 and #8.

Mailbutler Smart Assistant offers free plan; Vocus.io doesn't. Vocus.io is cheaper to start at $5/user/mo against $7/user/mo.

Vocus.io is the better fit for gmail sales teams that want tracking and CRM logging. Mailbutler Smart Assistant is the better fit for cross-platform users wanting AI email assistance.

  • Vocus.io fits best

    Gmail sales teams that want tracking and CRM logging

  • Mailbutler Smart Assistant fits best

    Cross-platform users wanting AI email assistance

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Vocus.io 8.8/10 Visit ↗ Mailbutler Smart Assistant 8.4/10 Visit ↗
At a glance
Editor score 8.8 8.4
Ranking #5 in Sales Email Tracking Software #8 in Sales Email Tracking Software
Best for Gmail sales teams that want tracking and CRM logging Cross-platform users wanting AI email assistance
Pricing model Paid Free plan + paid
Starting price $5/user/mo (best) $7/user/mo
Free plan — ✓ (best)
Free trial 30 days 14 days
Free trial length 30 days 14 days
Deployment Browser extension Cloud, Desktop, Mobile, Browser extension
Platforms Chrome extension Web, Windows, macOS, Linux, iOS, Android, Chrome extension
Integrations 12 integrations 5 integrations
Features Vocus.io 5/6 · Mailbutler Smart Assistant 0/6
Open tracking ✓ (best) Not checked yet
Click tracking ✓ (best) Not checked yet
Reply tracking ✓ (best) Not checked yet
Attachment tracking — Not checked yet
Real-time alerts ✓ (best) Not checked yet
CRM synchronization ✓ (best) Not checked yet
Specs
Email client support Gmail Not checked yet
Our review
Pros
  • Tracks opens per recipient, link clicks, and replies.
  • Automates follow-ups and provides templates, snippets, and reminders.
  • Logs email activity to CRMs through auto-BCC, webhooks, and Zapier.
  • Works with Apple Mail, Gmail, and Microsoft Outlook
  • Combines email and link tracking with follow-up prioritization
  • Smart plan adds AI drafting, summaries, and task detection
Cons
  • Supports Gmail and G Suite, not Outlook.
  • No free plan; the 30-day offer is a trial.
  • Campaign attachments can be sent, but attachment tracking is not supported.
  • AI Smart Assistant requires Smart or Business after a 14-day trial
  • Starter includes a visible Mailbutler watermark on sent emails
  • CRM tracking data sync is limited to the Business plan
Our verdict

For Gmail and G Suite users, Vocus.io combines email tracking with outreach automation and CRM logging. Sales teams can track opens per recipient, link clicks, and replies, then use scheduled sending, follow-up sequences, reminders, and…

Read the review →

Mailbutler Smart Assistant adds AI writing and organization tools to email, alongside tracking and follow-up features. It is aimed at people working in Apple Mail, Gmail, or Microsoft Outlook who want to draft replies, summarize messages,…

Read the review →
  1. Vocus.ioSales Email Tracking Software 8.830-day trial
  2. Mailbutler Smart AssistantSales Email Tracking Software 8.4Free plan · 14-day trial

Strengths and trade-offs

  • Vocus.io — where it wins

    • Tracks opens per recipient, link clicks, and replies.
    • Automates follow-ups and provides templates, snippets, and reminders.
    • Logs email activity to CRMs through auto-BCC, webhooks, and Zapier.

    Where it doesn't

    • Supports Gmail and G Suite, not Outlook.
    • No free plan; the 30-day offer is a trial.
    • Campaign attachments can be sent, but attachment tracking is not supported.

  • Mailbutler Smart Assistant — where it wins

    • Works with Apple Mail, Gmail, and Microsoft Outlook
    • Combines email and link tracking with follow-up prioritization
    • Smart plan adds AI drafting, summaries, and task detection

    Where it doesn't

    • AI Smart Assistant requires Smart or Business after a 14-day trial
    • Starter includes a visible Mailbutler watermark on sent emails
    • CRM tracking data sync is limited to the Business plan

More comparisons

All sales email tracking software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update