White-label voice agents: the agency options

White-label here means selling AI phone agents under your own brand while someone else runs the software. In July 2026 there are three real routes: rent an agency ops layer like Hermes (from $149 a month), resell a finished product through Frontdesk’s programme, or build your own wrap on Retell or Vapi. Workings below.

Three deals hide under one label

The phrase gets used loosely, so pin it down before comparing prices. Route one, you rent a purpose-built agency layer: Hermes gives every client a branded workspace on your own domain and runs the billing, while the calls themselves happen on an engine underneath. Route two, you resell a finished product: Frontdesk lets you rebrand its receptionist end to end and set your own retail price on wholesale rates. Route three, you build your own wrap on Retell or Vapi and own every layer yourself. Same label, very different businesses.

Route one: rent the agency layer (Hermes)

Hermes is back-office software for voice agencies rather than a voice engine. Each client gets an isolated workspace, white-label URLs run on your own web address (a CNAME record, which just means pointing a subdomain you own at their servers), a CRM with an outbound dialler is built in, and client billing runs under your brand through Stripe Connect. The calls happen on managed engines underneath: the integrations page names Vapi and Retell, and the data-processing agreement names Retell AI as the voice sub-processor. So call quality belongs to the engine. What you pay Hermes for is the wrapper.

The published pricing (captured 11 July 2026) is a monthly fee with included minutes, then a flat overage. Here is the workings on the real rate: use only your included minutes and Starter costs about $0.50 a minute ($149 spread over 300 minutes), Business about $0.40 and Agency about $0.42. Past the allowance, Hermes’ own site disagrees with itself: the pricing page says $0.21 a minute on every tier and the integrations page says $0.24, both live on the day we captured them. We treat $0.21 as canonical and carry the band to $0.24 until the vendor clears it up. The billing line also lists $12 per knowledge base and US A2P text fees passed through at cost.

One more thing before the table, because it changes how you read every number: Hermes is in private beta at capture, with 100 operator spots, the first 60 days free, and a founding-member rate that locks at signup. Promotional pricing, in other words. Plan on it moving.

The worked economics of an agency book

Put real usage through Starter. Three clients doing 500 minutes a month each is 1,500 minutes, so 1,200 of them are overage: 1,200 × $0.21 = $252, plus the $149 fee makes $401 a month. That is about $134 per client, or roughly $0.27 a minute blended. If the integrations page’s $0.24 rate is the one that bills, the same book costs $437, about $146 per client. Whatever you charge above that is your margin, and what agencies charge is a number we will not invent, because we have no independent source for it.

Hermes’ own pricing page is happy to assume one, so quote it as the vendor’s claim: its Starter example models 3 clients at $2,000 a month each, $6,000 in and the $149 fee out, leaving $5,851 a month, which it rounds to a 98% margin, and the page states that most operators charge $1,500 to 3,000 a month per business client. Those client fees and margin percentages are the vendor’s assumptions, not our data. Two things the examples leave out. First, the overage meter: 300 included minutes across 3 clients is 100 minutes each a month, so any client whose agent genuinely answers the phone pushes you onto the per-minute rate (on our 500-minute book, a $2,000 client at $134 of cost is a 93% margin, if you accept the vendor’s assumed fee). Second, the Agency-tier example counts 15 clients while that tier lists 10 workspaces, which we cannot make add up from the published page.

One more piece of arithmetic keeps the whole pitch honest. A client buying Frontdesk directly at 500 minutes a month pays $99 + 300 × $0.25 = $174 retail. Whatever you charge under your own brand competes with what the client could pay by finding the underlying product themselves. That gap is why the service around the agent (the scripts, the tuning, the reporting, the accountability) is what an agency actually sells; the software margin alone does not survive a client who can use Google.

Route two: resell a finished product (Frontdesk)

Frontdesk (formerly My AI Front Desk) runs the clearest reseller programme we have captured. You rebrand the whole platform, your clients never see the Frontdesk name, you set your own retail prices (“charge $49 or $999, totally up to you” in the vendor’s words) and you bill through Stripe on wholesale rates that improve as you scale. The wholesale rates themselves are not published; the nearest public anchor is the pricing page’s Enterprise tier, which prices voice as low as 7 credits a minute ($0.07) against $0.25 on the standard plan.

The trade-off sits in what you are selling. Frontdesk is a receptionist product shaped for local trades and clinics: booking and texting with CRM sync, ready-made. If that matches your client base, this is the lowest-effort route to a branded offer. If a client needs something the product does not do, you cannot build around it the way you can on an engine. One dated caution: the programme terms above were captured on 31 May 2026, so re-confirm them before you sign.

Route three: build your own wrap on Retell or Vapi

This is the route Hermes itself runs on, which tells you it works and tells you the cost of doing it yourself. On Retell the meter reads $0.07 to 0.31 a minute all-in, and a typical build (GPT 4.1 with a US Twilio line) lands about $0.13 a minute; the HIPAA paperwork is self-serve at no extra fee, which matters if your clients include clinics, and there is a branded-call add-on at $0.10 per outbound call. On Vapi the platform fee is $0.05 a minute with every component billed at cost from your chosen providers, 10 concurrent lines included and $10 per extra line per month; HIPAA is a $2,000 a month add-on there.

The engine bill is the cheap part. Everything an agency needs on top (per-client separation, usage metering, reporting, rebilling) is yours to build and maintain, and none of it is billable client work. My read: with one or two clients this route is the obvious pick, cheapest and fully in your control. Past roughly five clients the admin becomes the product, and that is precisely the gap Hermes and Frontdesk’s programme price against. Honest limit: that five-client threshold is our judgement from the pricing arithmetic above, not a measured number.

What Synthflow’s exit tells you

Until mid-2026 the reference point for self-serve white-label was Synthflow, which published a $2,000 a month white-label price. Between 15 June and 11 July 2026 (our dated screenshots bracket the window) every published rate disappeared, replaced by a single enterprise card: contracts from $30,000 a year, behind a talk-to-sales form.

Two lessons for anyone planning an agency on this page. The published-price white-label lane just lost its most visible occupant, which is exactly the space Hermes’ ops layer and Frontdesk’s reseller programme are pitching into, and part of why a four-person beta product is getting attention at all. And the market reprices fast enough that a plan built on any number above should treat it as dated the day we captured it. Build your client pricing with headroom for the platform underneath you changing its mind.

The honest limits

Hold four things loosely. Hermes is a private-beta product from a four-person team, with founding pricing, no independent reviews we could find, and two different overage rates on its own site the day we captured it. Frontdesk’s wholesale rates are quote-only, so the reseller economics cannot be fully checked from outside. We have not placed test calls through any of these platforms in an agency configuration, so nothing here is a call-quality claim. And every margin figure that assumes a client fee is the vendor’s assumption, clearly labelled, because nobody publishes independent data on what agencies charge.

Next step if you are weighing this up: start with the white-label use-case hub for the ranked list, then read the full Hermes and Frontdesk profiles, and check the engine pricing on Retell and Vapi before you promise a client a rate.