You told us on the brand call that the competitors that keep you up at night aren't the patient-comms incumbents — they're the AI-native voice agents: Assort Health, Transform9, and Sierra. So we re-ran the measurement in their category — "AI voice agents / patient-call automation for healthcare" — across ChatGPT and Perplexity. The result: when buyers ask AI about this category, the assistants name Hyro in half of all answers, then a long tail of AI-native startups. Artera shows up in just 9% — and only when the question is phrased as "patient communication," never as "AI voice agent." Of your three named rivals, only one is real today: Assort Health is named more often than Artera and has more clean branded search. Sierra and Transform9 are essentially invisible in healthcare AI answers — for now.
v1 of this report scored Artera against the patient-communication incumbents — Luma, Phreesia, Solutionreach, TigerConnect. On the brand call you flagged that those aren't the threat. The companies you're watching are a newer class: AI-native voice agents that answer the phone, schedule, triage, and handle patient access end-to-end. So we threw out the old competitor set and re-ran the whole measurement in that category.
AI voice agents as the core product. Trained on 150M+ patient interactions, specialty-specific scheduling, referrals, intake, refills. The assistants treat it as the go-to "AI patient access" name.
assorthealth.com
Healthcare-specific AI voice agents for specialty physician groups (ortho, neuro, ophthalmology). Rule-engine + multiple agent types. Earliest-stage of the three.
transform9.com
Bret Taylor & Clay Bavor's enterprise AI-agent platform. Healthcare is one vertical among many. The assistants describe it as powerful but not healthcare-native — custom builds, long implementations.
sierra.ai/industries/healthcare
We asked ChatGPT and Perplexity 16 buyer questions each about AI voice agents / patient-call automation for healthcare — 32 answers — and counted how often each company was named. This is the brand-recognition read for the new category. Hyro is the runaway leader, named in half of all answers. Below it sits a fragmented field of AI-native startups. Of your three flagged competitors, only Assort Health registers — and it lands above Artera. Sierra and Transform9 never came up unless we named them.
"Share of answers" = the share of the 32 category answers that named the company at least once. The field has a long tail (40+ vendors named in total, most once or twice); only the leaders are shown. Perplexity especially scatters across many obscure names, which is itself a signal that this category has no settled set of "known" players yet.
Here's the pattern hiding inside the 9%. When a buyer's question is phrased around patient communication, engagement, or outreach, the assistants name Artera every time. The moment the question is phrased around an AI voice agent, the phone, the call center, or patient access automation, Artera disappears — and the AI-native names take over. The category language is doing the gatekeeping. Assort, by contrast, shows up on the voice-agent side, where the growth is.
Each number is how many of those questions named the company (e.g. "3/3" = all three). The strategic read: Artera owns the AI's "communications" shelf, but the buyer demand — and the venture money — is moving to the "AI voice agent" shelf, where Artera isn't yet stocked and Assort is.
Assort Health is the only one of the three flagged competitors worth a direct comparison today. Artera holds its own on ChatGPT (which answers from training data and reputation). But on Perplexity — which pulls live "best software" list articles — Artera was named zero times in this category, while Assort appeared twice. Same gap we saw in v1, now against a faster-moving rival.
On ChatGPT, both were named in 3 of the 16 category answers — a tie. Artera's reputation carries it here.
On Perplexity, Artera was named in 0 of 16; Assort in 2. Perplexity quotes third-party "best AI voice agent" lists — and Artera isn't on them for this category.
In an emerging category, branded search is a weak signal — these companies are too new for buyers to search by name. That's exactly why AI recognition (Section 2) is the leading indicator here. Still, the clean, in-category brand searches say something: Assort Health already pulls ~4,400 US searches a month — more than Artera's clean patient-comms searches, and far more than the others. Transform9 is a rounding error. Sierra looks huge until you separate the company from the category.
Artera = clean patient-comms searches (artera health + artera login), after stripping the utility/cancer namesakes. Sierra = healthcare-specific only.
Sierra looks like a giant if you count the bare term — but almost none of it is healthcare. Here's the split for the "sierra ai" searches:
sierra ai (all uses)14,800sierra ai healthcare20Sierra's brand is booming — but as a horizontal AI company, not a healthcare patient-comms one. ~0.1% of its search is healthcare-specific.
Artera's own Google Search Console is the contamination-free read of its demand — it only counts searches that led to artera.io. It backs up the AI picture from a separate source: Artera is found by buyers who already know the name, not by category discovery. That's a strong position to defend — but it's the opposite of how the AI voice-agent category is being discovered (cold, by capability).
Artera's 15 most-clicked Google queries are all branded (artera, artera careers, artera health, guillaume de zwirek…). Not one is a category search like "AI patient scheduling." Note: appearances and clicks both fell ~16–22% vs the prior 28 days — worth watching, though this GSC connection is new (June 2026) so early numbers may be incomplete.
Interest over the last 12 months (US, each line scored 0–100 vs the group peak). Sierra's search interest roughly 5×'d — the steepest curve by far — which is almost certainly why it's on your radar. But as Section 5 showed, that surge is Sierra-the-AI-company, not healthcare. Assort Health is grinding upward on a tiny base. Transform9 is flat at the floor. Artera's line is the ambiguous bare term (three companies share the name), so read it loosely.
We also asked both assistants directly about Artera and the three challengers. The reputation read is good — but the category framing the AI has assigned is the strategic problem.
Both assistants call Artera "one of the strongest enterprise patient communication platforms," cite Artera Harmony's AI voice agents, 1,000+ orgs, ~2B communications/yr, and deep EHR integration. The problem isn't what AI thinks of Artera — it's that AI doesn't reach for Artera in the voice-agent category.
Asked to compare them, the assistants repeat the same split almost verbatim: "Best patient communication platform: Artera. Best AI patient access platform: Assort." Artera is cast as communications-first adding AI; Assort as AI-native, voice-first. If "AI patient access" is where buyers go next, that framing favors Assort.
When asked for Artera's competitors directly, AI still lists the incumbents (Luma, Klara, Solutionreach) and the category leaders (Hyro, Infinitus, Syllable) — not Assort, Sierra, or Transform9. The market you're worried about and the market the AI has mapped don't overlap yet. That gap is the opportunity.
Artera Harmony already does voice — but AI files Artera under "communications." Publish capability pages, proof, and comparisons using the voice-agent language ("AI patient call automation," "AI medical receptionist," "replace your IVR") so the assistants start naming Artera on those 13 prompts where it's currently absent.
Assort has ~4,400/mo branded search and the AI's "AI patient access" slot. Run conquesting on Assort terms, build an "Artera vs Assort Health" comparison page, and get onto the third-party "best AI voice agent" lists Perplexity quotes. Don't over-invest in Sierra/Transform9 keywords yet — there's no healthcare demand there.
The category terms are wide open — almost no one (Artera included) ranks for "ai voice agent healthcare," "ai medical receptionist," "ai patient call automation," "ai appointment scheduling healthcare." These are net-new ad groups worth testing alongside the current structure, capturing cold category demand before the AI-natives own it.
No vendor owns this category yet (40+ names, Hyro aside). That's rare and it won't last. Re-run this exact prompt set each quarter to watch Assort's trajectory, whether Sierra enters healthcare answers, and whether Artera's voice-agent content moves the 9%.
Re-run on 2026-06-19 in the AI voice-agent / patient-call-automation category, against the competitor set Artera flagged on the brand call (Assort Health, Transform9, Sierra). The patient-comms incumbents from v1 were removed. Two data pulls, fully repeatable.
16 category questions (counted toward each company's share) + 8 direct/comparison questions about Artera and the three challengers, each run live on ChatGPT and Perplexity via BrightData (web_data_chatgpt_ai_insights, web_data_perplexity_ai_insights). Grok was skipped (its tool times out).
A company scores once per answer that names it. "Share of answers" = answers naming it ÷ 32 category answers. The 8 direct/comparison questions are analyzed qualitatively (Section 8), not in the tally. Questions were also bucketed by framing — "patient communication" vs "AI voice agent" — for the grid in Section 3.
Google search volume (US, 12-mo) for each brand plus category terms, and 12-month Google Trends. Ambiguous brands (Artera, Sierra) were disambiguated to their clean, in-category terms. Artera's own demand is also read from its Google Search Console (Section 6).
This is a young category — AI answers are noisier here than in the settled patient-comms space, and Perplexity in particular scatters across many one-off names. Treat the tiers and the pattern as solid (Hyro leads; Artera weak in voice framing; Assort the only live challenger; Sierra/Transform9 absent) and the exact decimals as directional. AI answers vary run-to-run, so re-run the identical set to track the trend, not the single number.
Buyers increasingly discover vendors by asking AI about a capability ("an AI agent that answers our phones"), not a brand. Artera is found by name and strong on the "communications" framing — but the threat you named lives on the "AI voice agent" framing, where Artera is currently absent and Assort is establishing itself. That's measurable today, and movable.