An email-deliverability problem should be investigated across list quality, sender configuration, targeting and campaign behavior. This guide does not report a two-million-send experiment or establish that Apollo deliverability has declined.
This is a Leadpipe-authored buying guide. Product statements are based on the linked vendor references; evaluation steps are recommendations, not reported test results.
Start with the observed failure
A bounce, a spam placement and a lack of replies are different outcomes. Collect the sending-system evidence and the campaign’s target definition before blaming the data supplier or increasing volume.
| Symptom | Evidence to inspect |
|---|---|
| Hard bounces | Address status, source and validation timing |
| Wrong-person replies | Employer and role freshness |
| Spam complaints | Targeting, permission, message and suppression |
| Low positive replies | Relevance, offer and timing |
| Inconsistent performance | Sender, cohort and time-period differences |
Keep the data and execution questions separate
Apollo combines research and engagement. Record which system supplied the contact and which sent the message. Review a representative sample for current role, employer and required fields before changing tools.
Do not use an open-rate change alone as proof of inbox placement or buyer intent. Compare delivery failures and substantive replies, keeping the population and time window explicit. Label sample limitations.
Change one part of the process at a time
Pause inappropriate targeting and honor suppression immediately. For the remaining approved campaign, make a documented change and compare comparable cohorts. Changing list source, sender, copy and volume together makes the result difficult to interpret.
Our Apollo alternatives guide can help with a supplier shortlist after the failed requirement is clear. Apollo pricing covers the cost of the selected workflow. A new data source does not remove the need for responsible targeting and sender operations.
Where Leadpipe fits
Leadpipe supports both account-level and person-level workflows. Its IP to Company API retrieves stored company information from an IPv4 or IPv6 address; its separate Identification product supplies eligible visitor records and activity. Choose company context for account research and person-level output when the action requires a specific visitor. A company lookup returns no people or visits. Confirm API eligibility and its separate lookup allowance in the official documentation.
Person-level coverage is strongest in the US. EU/UK traffic defaults to company-level identification; person-level requires affirmative consent. Fields can be missing, so judge required output on your actual traffic. If you need research signals from outside your website, evaluate Orbit separately and check its audience allowances.
The current pricing page lists Pro 500 at $147/month for 500 identification credits. The trial is 7 days or 500 profiles, whichever comes first, no card. Confirm the delivery and data-use requirements of your chosen plan.
Use the vendor evaluation kit to record the same acceptance criteria for every candidate. Start a Leadpipe trial when website identification is the requirement you want to measure.
Related decisions
Browse the comparison directory for alternatives and head-to-head guides. Use the software buying guide to define requirements and the person-versus-company guide to interpret identification results.
Related vendor guides
- Apollo Alternatives for Prospecting and Sales Workflows
- Apollo vs RocketReach: Prospecting or Contact Lookup?
- Apollo vs UpLead: Prospecting Workflow and Data Quality
Sources and review basis
Published by Leadpipe. Vendor references support product descriptions; recommendations reflect our assessment of fit. Confirm current plan and contract terms before buying.
