Apollo vs TrackMailBox

Apollo is a data intelligence and sales engagement platform for go-to-market teams. It describes a prospecting database with more than 240 million contacts and 30 million accounts, alongside email sequencing, automated outreach, dialing, call recording and pipeline tools. Apollo’s agents can research accounts, prioritize leads, write outreach, follow up and book meetings. The platform lists more than 200 integrations, including Salesforce, HubSpot, Outreach, SalesLoft, Marketo, Sendgrid, LinkedIn and major email providers. Its free Chrome extension provides contact and account insights, email finding and dialing, and can add prospects to lists or sequences. The Free plan is free and includes 900 credits per seat per year, granted monthly, two sequences, API access and one intent topic. Basic costs $49 a month billed annually, with 30,000 credits per seat per year granted upfront, email sequencing and core integrations. Trial credits and features are subject to limits; unused credits expire at the end of each billing cycle.

TrackMailBox is a free Chrome extension for Gmail and Google Workspace that tracks email opens and link clicks. It records whether recipients open messages, how many times, and which tracked links they select, with real-time desktop notifications for both events. Gmail’s Sent folder displays Opened, Clicked, Unopened, and Untracked badges. Scheduled Gmail messages receive tracking automatically. A Best Time calendar analyzes engagement patterns across regions and time zones to suggest sending hours. Users can create, search, manage, and insert templates containing subject lines and body text from Gmail’s compose window. The Free Forever plan costs nothing, billed forever, and lists unlimited email tracking, open history, link tracking, notifications, a detailed analytics dashboard, Chrome extension access, and 24/7 email support. Opens use an invisible 1x1 pixel; tracked links redirect through TrackMailBox servers. The privacy policy says email bodies are not stored, while data transmission and database connections are encrypted and access-controlled. Corporate firewalls may block pixels, and tracking can be delayed.