Sales Navigator + waterfall enrichment: how to reach 80% reachability

Sales Navigator is an exceptional targeting tool. It lets you build B2B prospect lists with rare precision: industry, company size, job title, tenure, recent activity signals. But once the list is built, one problem comes up every time: LinkedIn profiles don't contain direct contact details. No professional email, no phone number. To reach these prospects, you have to enrich the list — and that's where most teams hit a ceiling they can't get past. B2B waterfall enrichment is the method that breaks past that ceiling and reaches 80% reachability where classic approaches stall around 50 to 60%.

Why Sales Navigator isn't enough for reachability

Building a list in Sales Navigator solves the targeting problem. It's a fundamental, often underestimated step that drives the quality of everything that follows in the prospecting pipeline. But targeting and reachability are two distinct problems.

A LinkedIn profile, even precisely identified in Sales Navigator, almost never contains a professional email or a direct number. LinkedIn protects this data by design: access to contact details necessarily goes through an accepted connection or a third-party tool. To send an email or call a prospect, you therefore have to go through an external enrichment step.

This is where most teams make a simple mistake: they use a single enrichment tool, observe a hit rate of 40 to 60%, and consider that the market norm. It isn't a fatality — it's a limitation inherent to the single-provider approach.

The single-provider ceiling: why 60% isn't a maximum

Every B2B data provider — whether an established player or an emerging solution — has its own contact database, built according to its own methods and sources. That database has strengths on certain segments (for example, good coverage of US tech companies) and gaps on others (European SMBs, marketing roles in industrial sectors).

When you enrich a list through a single provider, you get access to what that provider knows — and nothing more. If the contact isn't in its database, the result is empty. And since no database on the market covers the entirety of B2B profiles, the hit rate structurally caps, often between 50 and 65%.

Most teams interpret this result as a limit inherent to B2B prospecting. In reality, it's a limit inherent to using a single provider. Switching tools doesn't solve the problem: it simply shifts the ceiling without removing it. The real solution is to change method.

Waterfall enrichment: the mechanics

Waterfall enrichment rests on a simple principle: instead of querying a single data provider, you query several providers sequentially, in a defined order, until a valid contact detail is found for each contact.

Here's how the process concretely unfolds.

Step 1 — Export and prepare the list from Sales Navigator

Waterfall enrichment always starts with a clean list. The profiles identified in Sales Navigator are extracted, structured, and passed to the enrichment layer as normalized data (first name, last name, company, domain). The quality of upstream targeting drives the relevance of every detail retrieved.

Step 2 — First pass through the main provider

The first provider queried is the one that statistically shows the best coverage rate on the targeted segment. For each profile, either a detail is found, or the contact is marked as unresolved and passed to the next provider. No contact stays stuck at this step.

Step 3 — The following passes fill the gaps

Contacts without a detail after the first pass are submitted to a second provider, then a third, and so on. Each provider brings its own database, its own collection methods, its own strengths on particular sub-segments. With each pass, a share of the contacts previously unresolved finds a match. It's this accumulation effect that breaks past the single-provider ceiling.

On top of external providers, some approaches integrate a proprietary dataset and email-reconstruction algorithms that find details the third-party databases don't reference. This extra layer is often decisive in reaching the highest enrichment coverage levels.

Step 4 — Triple-layer verification

Finding a detail isn't enough if it's incorrect. An invalid email address generates bounces that degrade the deliverability of your sending domains. An inactive number wastes time. That's why every detail returned by the waterfall goes through a verification structured in three levels: syntax verification, server-level verification, and actual deliverability verification. For phone numbers, verification covers the connectivity and activity of the line.

This triple verification guarantees that the details delivered are usable — not merely present in a database.

Why 80% reachability becomes achievable

Accumulating providers covers segments that none of them, taken in isolation, can reach. Add a proprietary dataset, email-reconstruction algorithms, and rigorous verification at the output, and the effective hit rate structurally exceeds what a single provider can produce.

Where a single-provider approach caps at 50-65%, a well-built waterfall on a qualified Sales Navigator list regularly reaches 75 to 85% reachability depending on the segments.

This figure has to be put in context: reachability also depends on the quality of upstream targeting. A poorly built list in Sales Navigator — with fuzzy personas or filters too broad — will mechanically limit the results, regardless of how powerful the waterfall is. The combination of precise targeting in Sales Navigator and waterfall enrichment is what lets you optimize both variables together.

To go further on building Sales Navigator lists before enrichment, see our article on how to turn a Sales Navigator list into a usable B2B database.

What it concretely changes for a prospecting pipeline

Take a simple example. A sales team builds a list of 1,000 prospects in Sales Navigator. With single-provider enrichment and a 55% hit rate, they have 550 reachable contacts. With waterfall enrichment reaching 80% reachability, that's 800 reachable contacts — 45% more pipeline on the same list, without any additional targeting work.

The impact isn't limited to volume. Better reachability also improves the return on investment of every prospecting sequence, reduces the cost per contacted lead, and lessens the pressure on teams to constantly build new lists.

The cost question: a calculation often framed wrong

The most frequent argument against waterfall enrichment is cost: querying several providers is mechanically more expensive than querying just one. That's arithmetically true — but the analysis stops too early.

What matters isn't the cost per enriched contact, but the cost per verified reachable contact. If simple enrichment costs you €0.05 per contact but produces 55% reachability, your real cost per reachable contact is €0.09. If a waterfall costs you €0.08 per contact and produces 80% reachability, your real cost per reachable contact drops to €0.10 — for 45% more volume.

The difference in cost per reachable contact is marginal. The difference in pipeline volume, on the other hand, is very significant.

This reasoning also applies to the choice of billing model. Pay-as-you-go enrichment — where you only pay for the credits actually used, with no subscription or commitment — lets you align cost directly with the value produced. It's a model that reflects confidence in data quality rather than a logic of retention by contract.

To understand in detail how to automatically enrich a Sales Navigator list, see our dedicated guide: enrich a Sales Navigator list automatically.

Conclusion

Sales Navigator solves the targeting problem. B2B waterfall enrichment solves the reachability problem. The two approaches are complementary, and it's their combination that lets you reach 80% reachability on qualified B2B prospect lists. The mechanics are simple: sequentially query several data providers, complete with a proprietary dataset and email-reconstruction algorithms, then verify every detail in three layers before delivering it. The result is a denser prospecting pipeline, higher-performing sequences, and a cost per reachable contact that stays under control. In a market where most teams stall at 50-60% reachability for lack of adopting this method, waterfall enrichment is a durable structural advantage.