Requires at least one of: Findymail or Icypeas API key. Add either or both in Manycrawl Settings → Integrations before creating this column. Calls go from your browser straight to each provider — Manycrawl never sees your keys or the results. You pay providers directly at their rates, with no Manycrawl markup. See how to add your API keys →
Waterfall is the smartest of the email-finding enrichments. Instead of relying on a single provider, it tries Findymail first and then automatically falls back to Icypeas (or vice versa) when the first provider can't verify an email. Each provider has slightly different coverage — Waterfall combines them so you get a higher overall fill rate than either one alone.
If you only have one of the two API keys set up, Waterfall still works — it just runs the single provider. Adding the second key meaningfully improves coverage at zero additional integration effort.
When you add a Waterfall column, you'll see a settings panel with name mappings, a domain field, and provider settings.
Waterfall is flexible about how you give it names. You can map any combination of these three columns:
Full name from — a column containing the full name (e.g. Jane Smith). Optional if you've mapped First name and Last name separately.
First name from — a column containing just the first name. Optional if you've mapped Full name.
Last name from — a column containing just the last name. Optional if you've mapped Full name.
The two providers prefer different inputs:
Findymail prefers a full name (or first + last combined)
Icypeas requires first name and last name as separate fields
If you map both Full name and First/Last name, Waterfall uses whichever the active provider needs. The most flexible setup is to map all three columns when you have them — Waterfall will route the right data to each provider automatically.
If your source data only has a full name, run Split cell on it first to separate First name and Last name into their own columns — that unlocks Icypeas as a fallback provider.
Pick the column containing the domain where the person works. Required.
Manycrawl accepts any common format:
A bare domain (acme.com)
A full URL (https://acme.com/about)
A scraped Links column — the hostname is extracted automatically
The first row's value is shown as a preview.
Two checkboxes control which providers Waterfall is allowed to use:
Findymail — requires full name and domain. Generally strong on B2B coverage.
Icypeas — requires first name, last name, and domain. Strong bulk-lookup pricing.
Enable at least one. Enable both for the full waterfall behavior.
When both providers are enabled, this dropdown controls which one runs first:
Findymail → Icypeas (default) — try Findymail first; if no verified email, try Icypeas
Icypeas → Findymail — try Icypeas first; if no verified email, try Findymail
The right order depends on your provider preference and your credit balance with each. If Findymail tends to give cleaner results for your audience, keep the default. If Icypeas has better pricing on bulk lookups and you want to save Findymail credits for cases where Icypeas comes up empty, flip the order.
Waterfall stops at the first provider that returns a verified email — it doesn't run both for every row. That keeps your credit spend efficient.
Each row gets a verified email (when one is found) plus metadata showing which provider returned it. Empty results mean neither provider could verify an email for that person at that domain — usually because the company is too small to have public attribution, the person uses a private email pattern, or the name doesn't match an active account.
You have a list of 500 contacts from a CRM export with first names, last names, and company domains — but the email column is half empty. Waterfall fills it in.
Setup:
First name from: your First name column
Last name from: your Last name column
Domain from: your Domain column
Providers: both Findymail and Icypeas enabled
Usage order: Findymail → Icypeas
Hit Create and run. Within a few minutes, every contact has a verified email attached where either provider could find one — typically with significantly higher coverage than running a single provider alone.
You've scraped LinkedIn profiles via Search Engine and split out names. Combined with the company domains from each profile's snippet, Waterfall converts the whole list into a campaign-ready contact file.
Pipeline:
Search Engine — find LinkedIn profiles for your ICP
Split cell — extract first name and last name from the SERP Title
Format personal name — strip emojis and symbols
Analyze and Write (or another Split cell) — extract the company domain from the profile snippet
Waterfall — feed all three (First name, Last name, Domain) into Waterfall for verified emails
End result: a verified-email list built from nothing but a Google search query.
Validate a list you already have. If you have emails in your CRM but suspect some are guesses or stale, running Waterfall on the names + domains gives you a verified version to compare against. Mismatches are worth manual review.
Enrich event attendee lists. Conference attendee exports often include name and company but no email. Add a domain column (from company name → website lookup, or manual entry) and Waterfall completes the contact details.
Combine with Find email by domain for full coverage. Use Find email by domain to catch role-based emails (CEO, Founder) at companies, and Waterfall to catch specific named people at the same companies. Two columns, one ICP, broadest possible reach.
Map all three name fields when you have them. Waterfall is smarter when it can route the right data to each provider. Findymail prefers full names; Icypeas needs first + last separately. Mapping all three means both providers run at full effectiveness.
Run Split cell first if you only have full names. A two-second Split cell pass unlocks Icypeas as a fallback provider, which materially improves overall fill rate.
Enable both providers when possible. Each one has gaps the other fills. The whole point of Waterfall is that you don't need to pick — let it try both, in the order you prefer.
Verify credits at both providers before big runs. A Waterfall column on 500 rows can consume up to 500 Findymail credits plus up to 500 Icypeas credits in a worst case (where every row fails Findymail and falls through). Check both balances.
Expect a fill rate, not 100% coverage. Even with two providers, verified emails are gated on real public data. Typical fill rates with both providers enabled are higher than with either alone, but they're never 100%. That's the price of clean, verifiable data.
Pair with Email provider finder. Once you have emails, check infrastructure — strict DMARC policies, security gateways, and role addresses are deliverability risks worth knowing about before launching a campaign.
You pay providers directly. Manycrawl doesn't mark up calls. Whatever you'd pay Findymail or Icypeas on their own, you pay through Manycrawl.
