Reachability Rate vs Enrichment Rate: Don't Confuse the Two

A vendor advertises an 80% enrichment rate on your list. You launch your sequences, and yet a large share of contacts never reply — or worse, bounce your emails. The problem doesn't necessarily come from your sales approach: it often comes from confusing two metrics that have nothing to do with each other. The enrichment rate measures what was found. The reachability rate measures what actually works. As long as these two figures stay conflated, every decision based on them starts from a flawed footing.

Two rates, two different questions

The enrichment rate answers a simple question: out of 100 contacts submitted, for how many was a data point returned? It's a find rate. A data point counts as soon as it exists in a database, is syntactically plausible, and is tied to the right name and the right company.

The reachability rate answers a different question: out of those same 100 contacts, for how many does the data point actually work? That is, an email that doesn't bounce, or a number whose line is active. This rate can only be measured after verification, not at the moment of the search.

These two rates are linked but independent. You can advertise a high enrichment rate while having mediocre reachability, simply because some of the data points found don't hold up once tested.

Why the confusion is so widespread

Marketing vocabulary keeps the haze going. “Found” and “reachable” are often used as synonyms, when they describe two distinct stages of the same process. A sales page advertising an impressive enrichment rate implies, without saying so explicitly, that the figure equals reachability.

This shortcut isn't always dishonest. The enrichment rate is simply easier to produce and display: it's calculated right after the search, without waiting for the result of a verification or a real campaign. The reachability rate, on the other hand, takes time and testing resources that few vendors detail publicly.

Sales teams often inherit this vocabulary without questioning it. They compare vendors on their enrichment rate alone, convinced they're comparing equivalent results, when they're comparing promises built on different definitions.

A high enrichment rate can hide a low reachability rate

The gap between the two metrics isn't theoretical. An independent test run across several B2B data vendors measured enrichment rates (match rate) ranging from 61% to 94%, while deliverability verified by real sending fell back between 52% and 87% depending on the vendor. On a campaign of 10,000 contacts, the gap between verified coverage of 68% and 96% represents roughly 2,800 more reachable prospects, for the same starting volume.

The worked example

Take a list of 1,000 prospects. A vendor enriches 750 of them: its advertised enrichment rate is 75%. But once those 750 data points are run through real verification (syntax, server, actual deliverability), only 520 pass the test. The real reachability rate is therefore just 52%, almost 23 points below the advertised figure.

The cause is mechanical. A “found” data point can be stale: a contact changed jobs, a professional domain expired, a line was deactivated. Until it's tested against reality, enriched data remains a hypothesis, not a certainty.

How to calculate and demand both rates separately

The safe rule is simple: never accept a single overall figure. Always ask for both rates, calculated separately on the same sample.

The enrichment rate is calculated like this: (contacts for which a data point was found / contacts submitted) x 100. The reachability rate follows the same logic, but after verification: (contacts whose data point is confirmed working / contacts submitted) x 100.

To get a reliable measurement, three reflexes are enough. Ask which verification method was used to produce the reachability rate, demand a test on a sample of your own list rather than on a demo file, and compare the gap between the two rates from one vendor to another: a small gap is often a better sign than a high enrichment rate in isolation. Our article on the three rates to demand before choosing a B2B data vendor details the full audit method.

Why this confusion is costly in prospecting

Choosing a vendor on its enrichment rate alone is like buying blind. Part of the credits spent funds data points that will never serve a single sequence. Reps waste time on dead contacts, and bouncing emails gradually degrade the sending domain's reputation, which also penalizes the campaigns that did target genuinely reachable contacts.

These are precisely the structural limits most classic enrichment solutions run into, as our article on the limits of B2B enrichment solutions details. The enrichment rate alone says nothing about what happens once the sequence is launched.

From enrichment to reachability: what really makes the difference

Closing the gap between the two rates means acting on two levels. The first is broadening the search: querying several vendors in a waterfall rather than just one increases the chances of finding a recent data point rather than data frozen in an old database. That's the principle of the augmented waterfall, which Listar applies by querying about thirty different providers before settling on a data point.

The second level, often neglected, is verifying every data point before delivering it: syntax check, server-level verification, actual deliverability test for an email, connectivity and activity check for a number. It's this triple verification that turns a “found” data point into a genuinely reachable one, and that brings the reachability rate closer to the enrichment rate rather than 20 or 30 points below it. To go further on this approach, our article on Sales Navigator and waterfall enrichment shows how to reach 80% reachability on a qualified prospect list.

Conclusion

The enrichment rate and the reachability rate don't measure the same thing, and confusing them leads to judging a vendor on the wrong metric. The first counts what was found, the second counts what actually works once tested. The gap between the two can exceed 20 points depending on how rigorously verification is applied upstream. Before choosing a B2B data vendor, always demand both figures separately, and favor the one whose reachability rate comes closest to the advertised enrichment rate.