AI voice agents: AI search visibility ranking (2026)
How AI search engines rank ai voice agents by visibility and citations. 20 brands measured monthly across Google AI Mode: which brands the AI names in answers, which domains it cites as sources, and how the leaders compare. AI voice agent platforms used to power automated phone conversations, scheduling, support, qualification, and conversational workflows. Composite score: 70% visibility (% of AI answers naming the brand) + 30% citation rate (% citing the brand's domain). Full methodology →
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When buyers ask AI engines about AI voice agents, Retell AI is consistently named as the leader. With a visibility percentage of 50.0, Retell AI leads alongside other top brands like Synthflow and Bland. These brands are frequently mentioned in AI-driven evaluations, indicating their prominence in the industry.
The rankings of AI voice agents are largely influenced by where AI engines pull their information from. Top cited sources such as youtube.com, retellai.com, and lindy.ai contribute significantly to these rankings. Many of these are aggregator or review sites, which means customer feedback and expert comparisons play a vital role in shaping the data.
For a buyer evaluating AI voice agents, it's important to consider what AI engines prioritize: recent reviews, third-party validation, and the topical authority of the sources. Selecting a brand from this list could be informed by examining these aspects, ensuring it aligns with what AI engines determine to be reputable and trustworthy sources.
At a glance
What we observed in this category
Retell AI holds a commanding lead in this category with a composite score of 57.5, compared to the next closest brand Synthflow at 37.5. The category average visibility sits at just 10.0 percent, meaning Retell AI's 50.0 percent visibility is five times the norm. That gap is material because it reflects how often Google AI Mode surfaces one brand above all others when buyers research AI voice agents, compressing opportunity for every other player in the set.
Bland and Vapi each match Synthflow's visibility at 37.5 percent but carry zero citation share, exposing a sharp divergence between being named and being trusted as a source. Retell AI's citation rate of 75.0 percent against a category average of 6.2 percent shows it is not just mentioned but actively linked as a reference. Cresta presents the inverse case, appearing in citations at 12.5 percent despite zero visibility, suggesting it surfaces as a supporting source rather than a primary recommendation.
Google AI Mode is the dominant engine across every brand in the top ten, with no outlier performance on any alternative engine recorded in the data. The top cited sources list includes youtube.com, retellai.com, reddit.com, and several niche comparison or AI-tooling domains such as cloudtalk.io, vellum.ai, and arahi.ai. This pattern indicates Google AI Mode is drawing on a mix of video content, brand-owned pages, and third-party review or aggregator sites to construct its answers in this category.
Movers & shakers since last refresh
Biggest visibility risers
-
Retell AI 25% → 50% · rank #1 → #1+25pp
-
Synthflow 12% → 38% · rank #2 → #2+25pp
-
Bland 12% → 38% · rank #3 → #3+25pp
The ranking
| # | Brand | Visibility | Citation | Top engine |
|---|---|---|---|---|
| 1 |
retellai.com
|
50% | 75% | Google AI Mode |
Retell AI leads with 50.0 percent visibility and a 75.0 percent citation rate, placing its composite score 20 points above the next ranked brand. |
||||
| 2 |
synthflow.ai
|
38% | 38% | Google AI Mode |
Synthflow sits at 37.5 percent visibility and 37.5 percent citation, the only brand outside rank one where visibility and citation rates are in balance. |
||||
| 3 |
bland.ai
|
38% | 0% | Google AI Mode |
Bland matches Synthflow on visibility at 37.5 percent but records zero citations, pulling its composite score down to 26.2 against Synthflow's 37.5. |
||||
| 4 |
vapi.ai
|
38% | 0% | Google AI Mode |
Vapi shares an identical profile to Bland, with 37.5 percent visibility, zero citation share, and a composite score of 26.2, indicating interchangeable AI Mode treatment. |
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| 5 |
elevenlabs.io
|
25% | 0% | Google AI Mode |
ElevenLabs scores 25.0 percent visibility and zero citations, sitting 2.5 times the category average on visibility but below all four brands ranked above it. |
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| 6 |
poly.ai
|
12% | 0% | Google AI Mode |
| 7 |
cresta.com
|
0% | 12% | Google AI Mode |
| 8 |
cognigy.com
|
0% | 0% | Google AI Mode |
| 9 |
sierra.ai
|
0% | 0% | Google AI Mode |
| 10 |
observe.ai
|
0% | 0% | Google AI Mode |
| 11 |
talkdesk.com
|
0% | 0% | Google AI Mode |
| 12 |
five9.com
|
0% | 0% | Google AI Mode |
| 13 |
livekit.io
|
0% | 0% | Google AI Mode |
| 14 |
play.ai
|
0% | 0% | Google AI Mode |
| 15 |
deepgram.com
|
0% | 0% | Google AI Mode |
| 16 |
hume.ai
|
0% | 0% | Google AI Mode |
| 17 |
kore.ai
|
0% | 0% | Google AI Mode |
| 18 |
amelia.ai
|
0% | 0% | Google AI Mode |
| 19 |
soundhound.com
|
0% | 0% | Google AI Mode |
| 20 |
gladia.io
|
0% | 0% | Google AI Mode |
Sources AI engines trust in this category
Across the 8 buyer-intent queries we ran on ai voice agents, these are the domains Google AI Mode cited most often. If you're not on this list — or if your competitors are — that's a concrete PR / linkbuilding target.
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. More on visibility →
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. More on citation rate →
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. How AI engines pick sources →
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. How AI search ranking works →
Get your own ai voice agents 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.
Frequently asked about ai voice agents AI visibility
Who leads AI visibility in the AI voice agents category?
Retell AI leads with a composite score of 57.5 and 50.0 percent visibility, five times the category average of 10.0 percent. No other brand comes close, with the next highest composite score being 37.5 for Synthflow.
Which brands are most cited by Google AI Mode in AI voice agent queries?
Retell AI dominates citations at 75.0 percent, while Synthflow is the only other brand with a non-zero citation rate among the top five, at 37.5 percent. Bland, Vapi, and ElevenLabs all carry zero citation share despite meaningful visibility scores.
What sources does Google AI Mode anchor on when answering AI voice agent questions?
The top cited sources include youtube.com, retellai.com, reddit.com, and third-party aggregator or tooling sites such as cloudtalk.io, vellum.ai, and arahi.ai. This mix suggests the AI pulls from video content, brand-owned pages, and comparison resources.
Is there a meaningful gap between a brand being named and being cited as a source in this category?
Yes. Bland and Vapi each achieve 37.5 percent visibility but zero citations, while Cresta records 12.5 percent citations with zero visibility. These cases show AI Mode can mention brands without linking them and can cite brands without featuring them as primary recommendations.
Which brands showed the largest visibility gains in the most recent period?
Retell AI, Synthflow, and Bland each grew visibility by 25.0 percentage points. Only Retell AI and Synthflow paired that gain with a matching 25.0 point rise in citations, while Bland's citation delta remained at zero.
How concentrated is AI visibility across the 20 brands in this category?
Visibility is highly concentrated, with the category average at 10.0 percent and six of the top ten brands recording zero visibility. The top three brands by visibility account for the vast majority of all AI Mode appearances in this category.