AI Visibility Rankings · Marketing

Top 20 email warmup tools by AI search visibility (2026)

Tools used to build sender reputation, automate inbox interactions, improve deliverability, and reduce spam placement for outbound email programs. Ranked by a composite score: 70% visibility (% of AI answers naming the brand) + 30% citation rate (% citing the brand's domain). Full methodology →

Refreshed Jun 06, 2026

21%

Avg visibility across category

Avg citation rate

20/20

Brands successfully audited

At a glance

Category leader Mailreach 75% visibility · named in 6 of 8 AI answers

Most cited brand Mailreach 12% citation rate · the AI's most-trusted source brand in email warmup tools

Top cited domain skrapp.io Referenced by AI across the email warmup tools query set — the highest-leverage PR target in this category

Visibility spread 75pp Gap between top and bottom of the ranking · 8 brands at 0% (invisible to the AI)

What we observed in this categoryauto-generated

Mailreach leads the email warmup tools category with 75% AI visibility and a composite score of 56.2, placing it 12.5 percentage points ahead of second-ranked Instantly (62.5%). That gap is meaningful: the category average visibility sits at just 20.6%, meaning Mailreach appears in AI Overviews at 3.6 times the category norm. Instantly follows at 62.5%, and both brands hold identical citation rates of 12.5%, suggesting the top two positions are relatively stable and mutually reinforcing in how AI surfaces them.

A sharp divergence between visibility and citation exists from rank 3 downward. Lemwarm and Warmy both achieve 50% visibility but carry 0% citation rates, as do Warmup Inbox, Warmbox, Smartlead, Reply, and the majority of ranked brands. The category average citation rate is just 3.8%, indicating that most brands are named in AI Overviews but not hyperlinked or sourced — they are recognised but not trusted as authoritative references. Only Mailreach, Instantly, Folderly, and Mailforge carry non-zero citation rates.

Google AI Overviews is the dominant — and apparently sole — engine driving visibility across all ten tracked brands, with every brand listing it as their top engine. The cited sources anchoring AI responses in this category are notably indirect: skrapp.io, reddit.com, trulyinbox.com, snov.io, and emailbison.com all appear in the top cited source list, none of which are primary warmup tool vendors. This suggests the AI is synthesising comparison and community content rather than pulling directly from brand-owned domains to construct its category answers.

Movers & shakers since last refresh

Biggest visibility risers

Mailreach 0% → 75% · rank #0 → #1
+75pp
Instantly 0% → 62% · rank #0 → #2
+62pp
Lemwarm 0% → 50% · rank #0 → #3
+50pp

The ranking

#	Brand	Visibility	Citation	Top engine
1	Mailreach mailreach.co	75%	12%	Google AI Overviews
Mailreach leads with 75% visibility — 3.6x the 20.6% category average — and holds a 12.5% citation rate shared only with Instantly among the top five.
2	Instantly instantly.ai	62%	12%	Google AI Overviews
Instantly sits 12.5 points behind Mailreach at 62.5% visibility but matches it exactly on citation rate (12.5%), making it the only brand that rivals the leader on trust signals.
3	Lemwarm lemlist.com	50%	0%	Google AI Overviews
Lemwarm achieves 50% visibility — well above the 20.6% average — yet records a 0% citation rate, indicating AI names it frequently but does not source its domain.
4	Warmy warmy.io	50%	0%	Google AI Overviews
Warmy ties Lemwarm at 50% visibility and a composite score of 35.0, but also carries a 0% citation rate, leaving it equally visible but equally uncited by AI responses.
5	Warmup Inbox warmupinbox.com	38%	0%	Google AI Overviews
Warmup Inbox drops to 37.5% visibility and a composite score of 26.2, with a 0% citation rate, placing it 37.5 points below the category leader Mailreach.
6	Warmbox warmbox.ai	38%	0%	Google AI Overviews
7	Smartlead smartlead.ai	25%	0%	Google AI Overviews
8	Reply reply.io	25%	0%	Google AI Overviews
9	Folderly folderly.com	12%	12%	Google AI Overviews
10	Mailforge mailforge.ai	12%	12%	Google AI Overviews
11	Snov.io snov.io	12%	12%	Google AI Overviews
12	Mailivery mailivery.io	12%	0%	Google AI Overviews
13	Saleshandy saleshandy.com	0%	12%	Google AI Overviews
14	Mailshake mailshake.com	0%	0%	Google AI Overviews
15	Woodpecker woodpecker.co	0%	0%	Google AI Overviews
16	QuickMail quickmail.com	0%	0%	Google AI Overviews
17	GMass gmass.co	0%	0%	Google AI Overviews
18	Allegrow allegrow.co	0%	0%	Google AI Overviews
19	Manyreach manyreach.com	0%	0%	Google AI Overviews
20	Klenty klenty.com	0%	0%	Google AI Overviews

Sources AI engines trust in this category

Across the 8 buyer-intent queries we ran on email warmup tools, these are the domains Google AI Overviews cited most often. If you're not on this list — or if your competitors are — that's a concrete PR / linkbuilding target.

skrapp.ioreddit.comtrulyinbox.cominstantly.aisnov.ioemailbison.comsalesforge.aimailforge.ai

How to read this ranking

Four things worth knowing before you act on the numbers above. These are the same definitions across every industry page — for category-specific observations, see the What we observed section above (where available) and the per-brand insights inline in the ranking.

Visibility = being named

A brand's visibility % is the share of AI answers that mention it by name in the response prose. This is who AI engines actively recommend to the buyer.

Citation rate = being trusted

Citation rate is the share of AI answers that include the brand's domain as a clickable source link. This is what the AI treats as authoritative evidence — different from being named.

Top engine differs by brand

The "top engine" column shows which AI surface each brand performs best on. Big gaps between a brand's score across engines usually points to specific content or schema gaps.

Rankings move month to month

AI engines re-crawl and re-rank on shorter cycles than classical search. We re-audit every brand on this list at least every 30 days and refresh this page automatically.

Get your own email warmup tools brand audited

The brands above were curated from public market-leader lists. Want the same measurement against your own brand — including the queries you appear on, which competitors get named instead, and a prioritised fix list? Run a free preview.

Audit your email warmup tools brand → Browse all rankings Methodology →

Frequently asked about email warmup tools AI visibility

Who leads AI visibility in the email warmup tools category?

Mailreach leads with 75% visibility and a composite score of 56.2, followed by Instantly at 62.5%. Both are the only brands among the top five to carry a non-zero citation rate of 12.5%.

What is the average AI visibility for email warmup tools brands?

The category average visibility is 20.6% and the average citation rate is just 3.8%, meaning most brands appear infrequently in AI Overviews and are rarely cited as sources.

Which email warmup brands are named in AI Overviews but not cited as sources?

Lemwarm, Warmy, Warmup Inbox, Warmbox, Smartlead, and Reply all record 0% citation rates despite visibility scores ranging from 25% to 50%, meaning AI mentions them without linking their domains.

What sources does AI cite most when answering questions about email warmup tools?

The top cited sources include skrapp.io, reddit.com, trulyinbox.com, snov.io, and emailbison.com — predominantly third-party comparison and community sites rather than the warmup tool vendors themselves.

Which AI engine dominates visibility for email warmup tools?

Google AI Overviews is the top engine for every single tracked brand in this category, with no other engine recorded as a primary visibility driver across the 20 brands audited.

How large is the visibility gap between the top brand and the rest of the category?

Mailreach at 75% sits 25 points above Instantly (62.5%) and 25–50 points above ranks 3–5, while the category average is just 20.6%, making the leader's position markedly dominant.