Guide · AI Receptionists
The AI receptionist that names the most integrations is Upfirst with eight — but Upfirst is the one that doesn't list Zapier
Named connectors run from eight down to none across this market, and the vendor with the widest CRM list and the vendor with the broadest Zapier reach are not the same company.
If “connects to the most tools” is your buying criterion, the answer is short: Upfirst names eight connectors on its pricing page — Salesforce, HubSpot, Pipedrive, GoHighLevel, Clio, Acuity, Google Calendar, and Outlook. That is the longest list of specific, named tools in our dataset. Tied for second at seven each are AIRA (Google Calendar, Salesforce, HubSpot, QuickBooks, Slack, GoHighLevel, Zapier) and Trillet (Google Calendar, Cal.com, GoHighLevel, HubSpot, Meta lead forms, Stripe, Webhooks). At the bottom, Goodcall names just two — Zapier and Google Voice — and three vendors publish no integration at all, named or claimed: PATLive, ReceptionHQ, and CallSprout Sage, the 25th vendor, added to the index on 2026-09-09. That is an 8-to-0 spread across vendors that otherwise look interchangeable in a feature grid.
But the buyer question has three parts — CRM, calendar, and Zapier — and the vendor that wins on raw count loses on one of them.
The Zapier asterisk
Here is the trap. Upfirst has the widest named-CRM list and does not name Zapier. Its byte-identical pricing twin, AIRA — the two share a pricing engine, same prices, same call quotas — does name Zapier, but drops Pipedrive, Acuity, Outlook, and Clio to make room for QuickBooks and Slack. So if your “stack” runs through Zapier as the glue, the eight-connector champion isn’t actually the safest pick.
Zapier itself is the most common connector in the dataset: ten vendors name it explicitly — Goodcall, Rosie, Dialzara, Synthflow, My AI Front Desk, AIRA, Simple Phones, Ruby, AnswerConnect, and Abby Connect. If Zapier is your integration layer, breadth of native connectors matters less, and even Goodcall’s two-item list clears the bar.
CRM, calendar, Zapier — who covers all three natively
The cleanest way to read this market is to score each vendor on whether it names a real CRM, a real calendar, and Zapier — not generic placeholders like “CRM” or “100+ integrations.”
| Vendor | Named CRM | Named calendar | Zapier | Total named |
|---|---|---|---|---|
| AIRA | Salesforce, HubSpot, GoHighLevel | Google Calendar | Yes | 7 |
| Synthflow | Salesforce, HubSpot, GoHighLevel | Cal.com | Yes | 5 |
| Upfirst | Salesforce, HubSpot, Pipedrive, GoHighLevel, Clio | Google Calendar, Outlook, Acuity | No | 8 |
| Trillet | HubSpot, GoHighLevel | Google Calendar, Cal.com | No | 7 |
| Rosie | — | Google Calendar | Yes | 2 |
| Goodcall | — | — | Yes | 2 |
| Smith.ai | Clio | Calendly | No | 2 |
| CallSprout Sage | — | — | No | 0 |
Only two vendors hit all three columns with named tools: AIRA (seven connectors) and Synthflow (five). Synthflow is the per-minute developer platform here — $0 platform fee, $0.09/min voice engine — so it pairs Salesforce/HubSpot/GoHighLevel with Cal.com and Zapier while staying pay-as-you-go. AIRA is the per-call option, starting at $24.95/mo for 30 calls. Those are the two genuine “CRM + calendar + Zapier out of the box” picks. The near miss is Smith.ai, which names a CRM (Clio) and a calendar (Calendly) but no Zapier — and which names two fewer tools than it did in June, because the page it publishes them on was rebuilt on 2026-09-09.
What the placeholders are hiding
Several vendors publish integration claims rather than integration lists. Dialzara names “Zapier, CRM, Calendar” — two of those are categories, not products. Simple Phones lists “Zapier, CRM.” ServiceAgent names one real product, Jobber, and fills the second slot with “Calendar Sync.” NextPhone advertises “100+ integrations” and Thoughtly “200+ integrations” plus “Two-way CRM sync,” but neither names which CRMs, so you cannot verify your specific stack from the page. Treat an unnamed “CRM” the same way you’d treat an unpublished overage rate: it isn’t a commitment you can check before you buy.
The newest entry publishes neither a list nor a claim. CallSprout Sage — added on 2026-09-09 as the index’s 25th vendor, and its cheapest sticker at $22.95 per user seat per month (Call Center is $39.95 per seat) — names no integration partner on its pricing page or on its Sage voice-agent page, while the plan that carries Sage advertises “CRM-smart routing” without naming a CRM to route into. Two things ride with that price. It buys a seat, not a business, which is how every other vendor here is quoted: a five-person office starts at $114.75/mo, before Sage’s $0.39/min meter — which runs after a free first 30 seconds on every call — has billed a minute. And Sage is one included feature of a cloud phone system rather than a receptionist you buy on its own. On this page’s scoring it is a zero, which is not the same as scoring badly: there is nothing published to check.
The vertical specialists tell their own story. Slang.ai connects to OpenTable, SevenRooms, Yelp, and Tripleseat — four tools, all restaurant. Loman names six — Toast, SpotOn, Clover, Square, Olo, OpenTable — all point-of-sale and reservations. Ruby leans legal, naming Clio and Rocket Matter beside Zapier. Smith.ai used to stand next to it with a longer legal list, but the pricing-page rebuild of 2026-09-09 took MyCase and Filevine off the page, leaving Clio and Calendly; we dropped the pair rather than keep claiming a source that no longer states them. Smith.ai may well still support both — its integrations page, not its pricing page, is where that would be settled. High raw counts in those rows mean nothing to a buyer outside the vertical; a six-connector restaurant list is narrower, for a law firm, than Goodcall’s two.
How to read this
If your question is literally “who connects to the most tools,” it’s Upfirst at eight. If your question is the real one — “will it sync with my CRM, my calendar, and my Zapier stack” — the count is a decoy, and the answer is AIRA or Synthflow, the only two that name a CRM, a calendar, and Zapier together. Upfirst’s missing Zapier and the wall of unnamed “100+ integrations” claims are exactly why we count named connectors and publish the source page behind each one — and why, when Smith.ai’s rebuilt page stopped naming MyCase and Filevine on 2026-09-09, its count fell with the page rather than riding on a source that no longer states it.