The cheapest AI receptionist under $50 is a question of what gets capped, not what's on the price tag

If your only rule is “under $50 a month and a real paid plan, not a trial,” the dataset now gives you eight doors — two more than in June, and both newcomers sit at the ends of the list. The lowest sticker is $22.95, CallSprout Sage’s Business plan, new to the index this month; it is also the least comparable number on the page, because Sage charges per user seat where every other vendor here charges per business, and that seat includes no answering minutes at all. Behind it: $24.95, shared identically by Upfirst’s and AIRA’s Starter tiers, ReceptionHQ’s MessageExpress at $25, Dialzara’s Business Lite at $29, a tie at $39 between ReceptionHQ’s ReceptionistPlus 15 and ServiceAgent’s Core, Sage’s Call Center seat at $39.95, and two plans at $49 that could not be less alike — Rosie’s Professional with 250 included minutes, and PATLive’s Basic, cut from $75 in September, with none. Each of those numbers buys a completely different unit of work, and the moment you look at what’s included, the ranking scrambles.

Here is what under-$50 actually buys, by the included quota the vendor publishes:

Vendor	Plan	Price/mo	What’s included	Overage	Effective entry rate
CallSprout Sage	Business (per user seat)	$22.95	no Sage minutes	$0.39/min after the first 30s of each call	$0.39/min, nothing bundled
Upfirst	Starter	$24.95	30 calls	$1.50/call	~$0.83/call
AIRA	Starter	$24.95	30 calls	$1.50/call	~$0.83/call
ReceptionHQ	MessageExpress	$25	not published (“from”)	$1.99/call	—
Dialzara	Business Lite	$29	60 minutes	$0.48/min	~$0.48/min
ReceptionHQ	ReceptionistPlus 15	$39	15 calls	not published	~$2.60/call
ServiceAgent	Core	$39	~133 voice min	no flat rate — more credits at $0.02–$0.04	~$0.29/min
CallSprout Sage	Call Center (per user seat)	$39.95	no Sage minutes	$0.39/min after the first 30s of each call	$0.39/min, nothing bundled
PATLive	Basic	$49	no minutes	$2.60/min	$2.60/min, nothing bundled
Rosie	Professional	$49	250 minutes	not published	~$0.20/min

The lowest sticker is a seat, and it buys no answering time

CallSprout Sage is the twenty-fifth vendor in our index and the cheapest paid base price in it: $22.95 per user per month on the Business plan, $39.95 per user per month on Call Center, with the Sage AI voice agent included on both. Two things have to travel with that figure or it misleads.

The first is the unit. Every other vendor on this page prices per business; Sage prices per seat. A five-person office pays $114.75 a month for the Business plan, not $22.95 — which puts it above every other entry in this bracket before a single call is answered. Sage is also one included feature of a cloud phone system rather than a receptionist subscription sold on its own, so you are buying a phone system that comes with the agent, not an agent that comes with a phone number.

The second is that the seat bundles zero Sage minutes. The page says so outright. Every minute the agent talks is metered at $0.39, charged after the first 30 seconds of each call and billed by the second. A second meter runs alongside it — AI transcription at $0.0198/min, on every plan, with voicemail transcription free — and the page does not say whether a Sage-answered call also incurs that charge, so it is left out of the totals below rather than assumed either way.

Put a real month through it. Thirty calls averaging three minutes — exactly the workload Upfirst’s and AIRA’s $24.95 Starter covers — is 90 minutes, of which the 30-second waiver takes 15, leaving 75 billable minutes at $0.39. One seat bills $52.20, about $1.74 a call: more than twice the $24.95 pair’s ~$0.83, and out of this bracket altogether. (Our stored cost model cannot express a per-call free window, so it bills all 90 minutes and reads $58.05 for that month — exactly $0.195 per call high. The figures here apply the waiver by hand; treat any modelled Sage cost as an over-estimate rather than a quote.) Sage publishes no annual term on either plan, so there is nothing to prepay for a discount.

Scale it up and the sticker’s ranking evaporates: at the index’s reference workload of 200 calls a month averaging three minutes, one Sage seat models at about $257 and comes fifteenth of the twenty-one vendors priceable at that volume. Lowest base price in the index, mid-table on the bill. That gap is the whole reason this page lists quotas next to prices.

$24.95 and $24.95 are still the same plan twice

The cheapest per-business entries are not two options — they’re one. Upfirst and AIRA publish byte-identical Starter tiers: $24.95/mo, 30 included calls, $1.50 per call after that, and the same ~20% annual discount. The dataset flags it directly: AIRA’s pricing table appears to share a pricing engine or white-label lineage with Upfirst. Treat them as a single price point with two front doors, and pick on languages, integrations, or whichever brand you trust — not on cost, because there is no cost difference.

At 30 calls a month, that’s about $0.83 a call all-in. Cross the line into call 31 and every extra call is $1.50 — so the “cheap” plan is only cheap if your volume genuinely fits inside 30. A practice taking even two calls a day will blow through the quota by mid-month and pay Premium-tier money on a Starter plan.

Per-call versus per-minute is the real fork

The cheapest sticker ($22.95 a seat) and the cheapest unit are not the same vendor. Dialzara’s $29 buys 60 included minutes with $0.48/min overage — a per-minute model, not per-call. If your calls average three minutes, that 60 minutes is roughly 20 calls, and overage runs ~$1.44 per additional three-minute call. So Dialzara costs $4 more than Upfirst/AIRA up front and includes fewer effective calls, but its overage is gentler per minute on long calls.

ServiceAgent’s Core plan looks like the volume outlier at first glance. Its $39 unlocks 2,000 credits, and at 15 credits per voice minute that’s ~133 voice minutes — more than double Dialzara’s included time for $10 more — which works out to roughly $0.29 an included minute ($39 ÷ 2,000 is about two cents a credit). Two asterisks come with it. Those 2,000 credits are shared with SMS and ad features, so 133 minutes is an upper bound, not a guarantee. And there is no flat overage rate at all: past the bundle you buy more credits at the page’s stated $0.02–$0.04 each, which is $0.30–$0.60 a voice minute — dearer than the rate you paid inside the bundle, and a range rather than a number. ServiceAgent’s 20% annual discount drops the effective monthly rate to around $31 if you prepay, undercutting Dialzara on both price and included volume.

But ServiceAgent is not the most minutes you can buy under $50. Rosie’s Professional plan sits at the top of the bracket at $49 and includes 250 minutes — about 88% more voice time than ServiceAgent’s 133 for just $10 more, and more than four times Dialzara’s 60. On a pure per-minute basis that works out to roughly $0.20 a minute included — the lowest effective entry rate of any voice plan in this group, against ServiceAgent’s $0.29. Rosie is a flat-billing plan with English and Spanish on every call. The catch is the unknown: Rosie does not publish an overage rate, so once you exhaust 250 minutes the marginal cost is a blank you’d have to confirm with the vendor. ServiceAgent’s is barely firmer — a $0.02–$0.04 credit, so $0.30–$0.60 a minute, depending on how many you buy. In this whole bracket only three vendors publish a marginal minute you can hold them to — Sage’s $0.39, Dialzara’s $0.48 and PATLive’s $2.60 — and Sage’s, the newcomer’s, is the lowest of them. Rosie also lists a ~17% annual discount, which would pull the effective monthly rate to around $41 if you prepay.

At the far end of that fork sit the two vendors that bundle nothing at all, and their prices bracket the whole page. Sage’s $22.95 seat meters at $0.39 a minute; PATLive’s Basic, at $49, is a live-answering incumbent’s pay-as-you-go base with every minute billed at $2.60. PATLive cut Basic from $75 to $49 in September, which is what pulled it into this bracket at all — but the same 90-minute month costs $283 on it, so that $49 is an access fee, not a price for answering. A base rate with no quota behind it is not a cheap plan; it is a plan whose price you have not been told yet.

ReceptionHQ is the one to read carefully

ReceptionHQ lists two sub-$50 plans, and both hide their quota. MessageExpress starts “from $25/mo” with a $1.99 per-call rate but no published included call count — a message-taking plan, not a full AI receptionist. ReceptionistPlus 15 is more honest at $39 for 15 included calls, which works out to roughly $2.60 a call before any overage — the dearest included call among the per-call plans in this bracket. ReceptionHQ is a live-answering incumbent, so you’re partly paying for human handling, but on raw included volume it’s the worst value among the plans here that bundle anything at all.

How to read this

Under $50, the cheapest sticker and the cheapest work now sit further apart than they ever have. Sage’s $22.95 is the lowest paid base price in a 25-vendor index and it buys no answering time whatsoever — and it buys one seat, not one business, so the same plan starts at $114.75 for a five-person office and models fifteenth of twenty-one at 200 calls a month. For any volume-sensitive buyer, Rosie’s $49 for 250 minutes is the most included voice time in the bracket: ~88% more minutes than ServiceAgent’s 133 for $10 more, which prices out to roughly $0.20 a minute included versus ServiceAgent’s $0.29. ServiceAgent claws some of that back with a deeper 20% annual discount, which drops it to about $31/mo prepaid against Rosie’s ~$41 — but not on the margin, because neither vendor publishes a flat rate past the bundle and ServiceAgent’s route out is more credits at $0.02–$0.04 apiece, or $0.30–$0.60 a minute. If you expect to run past your included minutes, the only rates in this bracket you can hold a vendor to are Sage’s $0.39/min, Dialzara’s $0.48/min and PATLive’s $2.60/min. If you take a handful of calls a month, the $24.95/30-call plan is the one to buy — it bundles the calls instead of metering them, and a single Sage seat only slips under it while your volume is trivially small, roughly ten one-minute calls a month, at which point the choice hardly matters. ReceptionHQ’s $25 “from” price is the old trap: the lowest number on the page that tells you the least about what you’ll actually pay. Sage’s $22.95 and PATLive’s $49 are the new ones, and subtler — true prices, quoted per seat or with nothing bundled, attached to meters that start on your first call. None of these is “the cheapest” until you’ve named your own call volume, which is exactly why we list the quota next to every price.