Open Rate Accuracy Checker
Takes your reported open rate and the composition of your recipient list, and estimates what the real human-read rate is after filtering MPP pre-fetches, Gmail proxy duplicates, and corporate-scanner traffic.
You ran the numbers. Now see your real ones.
A calculator works from the figures you type in. Outsolvi measures them on the email you actually send, and grades every open so Apple Mail pre-fetches and security scanners don't inflate the count. Outlook and Gmail, from $7/user/mo billed yearly, 14-day free trial.
See it on your own inboxEstimates what share of your recorded opens were machines rather than people, then shows the human-read rate underneath. Apple Mail Privacy Protection pre-fetches and corporate security scanners are the two large sources, so the estimate scales with how much of your list sits behind each. Output is a range, because the exact split depends on list composition.
When your reported open rate doesn't match your reply rate (e.g., 70% opens with 8% replies suggests inflation). The real-rate estimate aligns the metrics.
How to use it
- 1Enter your reported open ratePull from your current tracker's dashboard.
- 2Pick your list mixChoose the closest match: typical B2B, tech or SaaS heavy, enterprise heavy, or mostly Gmail.
- 3Read the real-rate rangeThe tool shows a low and high band. It's an estimate from an assumed mix, so treat it as a rough guide, not a measurement.
Common use cases
- •Sanity-checking a campaign that 'over-performed' on opens
- •Justifying a tool switch by quantifying current measurement error
- •Calibrating sequence-stop thresholds based on real engagement, not inflated metric
FAQ
Why is reply rate the cleaner side-by-side signal?+
Reply rate depends on the human actually engaging, so it survives the open-tracking distortion. Open rate is contaminated by MPP, Gmail proxy, and scanners; reply rate is not.
What inflation factor should I use for a corporate-heavy list?+
Higher. Corporate email scanners (Microsoft Defender, Mimecast, Proofpoint) often open every link and image as part of security scanning, and at large corporate domains Omnivery found 80 to 95 percent of clicks came from scanners. Pick Enterprise heavy for a list that's mostly large companies.
Will my real rate ever look 'good' again?+
Yes, once you measure correctly. A graded open rate is smaller than a raw one, and that's fine: it's the number your replies will actually track. Set targets against the graded number, not against what your old tool reported.
Keep going
Articles, glossary entries, and other tools on the same topic.
Nate built Outsolvi after watching every email-tracking tool he had ever used lie to him about opens. Outsolvi grades every open as a person or a machine, in Outlook and Gmail, so the number on the dashboard is one a rep can actually act on.
We update these pages when the underlying mechanics change. new mailbox-provider rules, new tracker behavior, new measurement gaps. The dates above are real revisions, not auto-touches.