Six providers meet a genuine white-label bar for US agencies in 2026: a confirmed reseller, partner or wholesale program disclosed on the vendor’s own site, real fulfillment behind the brand, and no invented pricing. Options range from a $50/month rebrandable software tier to $30,000+ agency-plan contracts, spanning voice, SMS, chat, email and LinkedIn.
The short answer: For US marketing and sales agencies, the most credible white-label lead-generation partners in 2026 are LeadsNow AI (pay-per-result AI appointment setting, 50,769+ appointments booked since 2017), Callbox, Smith.ai, Smarter Outbound, Synthflow and Newson.io — each with a confirmed reseller, partner or wholesale arrangement, though the model, channels and price transparency differ sharply between them.
Methodology: how this list was built
Disclosure: this page is published by LeadsNow AI, a pay-per-result AI appointment-setting agency, and LeadsNow AI is listed first. That is a conflict of interest, stated here plainly so you can weigh the rest of the list accordingly.
Selection criteria. Every other entry had to clear three bars: it is a real, currently-operating company, verified independently and by fetching the vendor’s own site; it publicly confirms — on its own site or a credible third-party source — a white-label, reseller, partner or wholesale arrangement, not just a direct-to-client service; and it serves US-based agencies. Companies that only sell direct, or whose “partner” language meant referral links rather than resellable fulfillment, were dropped. No pricing was estimated; where a vendor doesn’t publish pricing, this page says so instead of guessing.
Ranking. Entries are grouped by category (full-service SDR agency, voice/chat receptionist reseller, multichannel outbound reseller, self-serve AI voice platform, all-in-one done-for-you plus SaaS reseller) rather than force-ranked 1-to-6, since “best” depends on which channel and price band an agency needs to resell.
How white-label lead-generation arrangements actually work
“White label” gets used loosely. In practice, US vendors run some mix of four models: referral/affiliate (you send the client, the vendor bills and delivers direct, you take a commission and never own the relationship); reseller (you own the client and the price, the vendor delivers under your brand at a wholesale rate); wholesale/platform integration (the vendor’s technology gets embedded into your own product, the deepest and priciest tier); and SaaS white-label (a rebrandable software product you run yourself or resell managed usage on top of).
The trade-offs below trace back to which model a provider actually runs, not to how good the marketing page sounds. Agencies that keep the client relationship and pricing power tend to do best; see what an agency keeps ownership of — contact data, campaign history, the relationship itself — versus what stays with the vendor in what you own when you leave a lead-gen vendor.
The 6 best white-label lead generation providers for US agencies in 2026
1. LeadsNow AI — pay-per-result AI appointment setting
Best for: agencies whose clients are scale-ups, mid-market or enterprise operators who already have volume and spend and want to add outcome-priced appointment setting without hiring an SDR team.
What they do: LeadsNow AI runs AI voice, SMS and chat agents that qualify prospects and book sales appointments on a pay-per-result basis. Since 2017 the agency has booked 50,769+ AI-set sales appointments and generated 1M+ leads, backed by 25 filmed client case studies and a 4.6 rating from 43 Google reviews. Named, cleared client work includes Sam Tajvidi / 121 Brokers, Colliers, Marcus Wilkinson / Iron Body, Foundr, SheSells.online and Lambda Academy. For agencies weighing this against building an internal SDR desk, see AI appointment setting vs. hiring SDRs.
How the white-label arrangement works: LeadsNow AI works with agencies on a case-by-case commercial basis rather than a published reseller rate card — margins, revenue share and minimums are set per partner, not fixed in advance. There is no public reseller price list to quote here, and this page will not invent one.
Trade-off, stated fairly: because terms are negotiated rather than self-serve, an agency can’t sign up and start reselling in an afternoon the way it can with a SaaS platform like Synthflow. It suits agencies that want a genuine outcome-priced partner and are willing to have a scoping conversation, not agencies that want an instant off-the-shelf price sheet.
2. Callbox — multichannel B2B SDR agency, Channel Partner Program
Best for: agencies that want an established, large-scale outsourced SDR partner and are comfortable with a broader co-branded marketing relationship rather than a narrow pay-per-appointment resale.
What they do: Callbox, founded in 2004, describes itself as one of the largest outsourced B2B marketing and sales-support providers, claiming 15,000+ companies served and 10,000+ campaigns run across 60+ countries. Outreach blends voice calls, email, LinkedIn, chat and event marketing with AI-assisted personalization.
How the white-label arrangement works: the Callbox Channel Partner Program runs three tiers (Silver, Gold, Enterprise) offering co-branding, webinar and event-marketing support, on-page SEO, content syndication and a pre-verified sales framework, with each partner assigned a dedicated production and SDR team. It is a genuine partner program, confirmed on Callbox’s own site, though it leans as much toward co-branded marketing services as toward pure appointment resale.
Trade-off, stated fairly: no pricing is published anywhere in the program; every tier routes to a consultation, so an agency can’t compare wholesale cost before talking to sales.
3. Smith.ai — white-label AI voice and live-chat receptionist
Best for: agencies whose clients need inbound call handling, live chat and web-lead qualification with appointment booking, rather than cold outbound prospecting.
What they do: Smith.ai runs 24/7 live agents (and AI agents) that answer calls and chats, pre-screen leads, schedule appointments, and make outbound calls back to web-form leads.
How the white-label arrangement works: Smith.ai publishes an Agency Reseller Program and a separate Wholesale Program on its own site. The Reseller Program discloses a revenue-share commission — 10% of referred-client billings, paid quarterly, rising to 15% once a partner has referred 250+ clients — rather than a flat per-client bonus. The Wholesale Program is for partners integrating Smith.ai’s agents directly into their own platform or brand; Smith.ai’s own partner pages do not use the term “white label.”
Trade-off, stated fairly: Smith.ai is a receptionist and intake service, not a cold-outbound lead-generation engine. It is strong for converting inbound and web-form leads into booked appointments, weaker as a stand-in for prospecting new-name pipeline.
4. Smarter Outbound — white-label multichannel outbound for agencies
Best for: smaller and mid-size agencies that want to resell a full outbound engine — email, calling, SMS, LinkedIn and WhatsApp — without building sending infrastructure or hiring reply-handling staff.
What they do: Smarter Outbound runs multichannel outbound campaigns (cold email, cold calling, SMS follow-up, LinkedIn outreach and WhatsApp follow-up) and reports 90+ active clients, 1,000+ monthly leads generated and a 4.7-star rating across 50 verified reviews, delivered by a US-based team that handles replies.
How the white-label arrangement works: the agency owns the client relationship and sets its own retail price; Smarter Outbound delivers infrastructure, lead sourcing, campaign execution and appointment setting behind the scenes, on a wholesale rate the agency marks up. Client-facing visibility of Smarter Outbound’s involvement is contractually optional. A free two-week trial campaign is offered with no contract.
Trade-off, stated fairly: it is a smaller operation than Callbox or Newson.io, with no long public track record or founding date disclosed on its site — likely more agile, but with less brand history to lean on when a prospective agency partner asks for references.
5. Synthflow — self-serve white-label AI voice-agent platform
Best for: agencies with the technical capacity to build and manage their own AI voice agents, who want to resell voice-only appointment scheduling, lead qualification and customer support as a branded product.
What they do: Synthflow is an AI voice-agent builder for inbound and outbound phone calls, claiming 65M+ monthly voice-call minutes processed across 30+ countries, with SOC 2, GDPR, HIPAA and ISO 27001 certifications listed.
How the white-label arrangement works: the Agency Plan is a self-serve white-label toolkit — custom branding on the client-facing dashboard, sub-accounts per client, per-client call-minute allocation, and automated rebilling at whatever price the agency sets. Per Synthflow’s own blog, contracts typically start at $30,000.
Trade-off, stated fairly: this is software, not a managed service. There is no included human SDR team or campaign strategist — the reselling agency (or someone it hires) has to build, prompt and maintain the voice agents itself. The white-label toolkit also covers voice only; SMS, chat and email are not part of the resold product.
6. Newson.io — all-in-one white-label SaaS plus done-for-you lead generation
Best for: smaller agencies that want the lowest-cost entry point into reselling lead generation, appointment setting and sales-closing under a rebranded software product.
What they do: Newson (UK-headquartered, large US-facing team) runs LinkedIn outreach, cold email and cold calling, positioning itself as a white-label, done-for-you lead-generation, appointment-setting and sales-closing service used by 3,000+ companies and agencies, per its own site.
How the white-label arrangement works: the platform is rebranded with the agency’s logo and colors within 24 hours of signup, offered across three depths — Done-by-You (software only), Done-with-You, and Done-for-You (Newson’s team runs delivery). Agency membership tiers are published from $50/month (Starter, software-only) up to $4,995/month (Premium, full done-for-you delivery), across Software, Lead, Appointment and Closer sub-plans; per-lead, per-appointment and per-call fulfillment pricing is quoted separately.
Trade-off, stated fairly: Newson is UK-headquartered, so a US agency evaluating it should confirm US-hours support and time-zone coverage directly before committing. The published membership tiers are for the software and partner infrastructure; the actual done-for-you fulfillment cost sits behind a separate quote.
Comparison table
| Provider | Best for | White-label model | Channels | Pricing disclosed publicly? |
|---|---|---|---|---|
| LeadsNow AI | Scale-up / mid-market / enterprise agencies wanting outcome-priced AI appointment setting | Case-by-case reseller/partner terms | Voice, SMS, chat | No — pay-per-result, no published rate |
| Callbox | Agencies wanting an established, large-scale multichannel SDR partner | Channel Partner Program (Silver/Gold/Enterprise, co-branded) | Voice, email, LinkedIn, chat, events | No |
| Smith.ai | Inbound call/chat handling and web-lead qualification & booking | Agency Reseller Program (disclosed commissions) or Wholesale Program | Voice, chat, outbound follow-up calls | Partial — commissions disclosed, wholesale unit price is not |
| Smarter Outbound | Smaller agencies reselling a full outbound engine | Wholesale rate, agency sets retail price, delivery under agency brand | Email, cold calling, SMS, LinkedIn, WhatsApp | No |
| Synthflow | Technical agencies building/reselling their own AI voice-agent product | Self-serve Agency Plan, white-label dashboard, agency-set pricing | Voice only | Partial — Agency Plan contracts typically start at $30,000/yr, per Synthflow’s own blog |
| Newson.io | Lowest-cost entry into reselling a rebranded lead-gen SaaS plus DFY delivery | Done-by-You / Done-with-You / Done-for-You, rebranded software | LinkedIn, cold email, cold calling | Yes — agency membership $50–$4,995/month |
Two things stand out. Published pricing is the exception, not the rule — only Newson.io and, partially, Synthflow put a number in front of an agency before a sales call. And no single provider covers every channel: an agency chasing true omnichannel resale (voice, SMS, chat, email and LinkedIn together) will end up combining partners, or picking the one whose gap matters least. For a broader, non-reseller comparison of US appointment-setting vendors, see the best AI appointment-setting services in the USA.
What to check before signing a white-label lead-gen contract
Agencies serving scale-up and mid-market clients tend to get burned on the same three points: unclear ownership of lead and contact data if the relationship ends, vague language about who the end client deals with when something goes wrong, and a wholesale rate that only becomes visible after a sales call. That is standard due diligence for reselling any fulfillment service, not something specific to lead generation. If your agency already serves scale-up or mid-market accounts, the ICP and deal-size considerations in lead generation for scale-ups apply directly to which of these six partners fits your book of business.
Frequently asked questions
What does “white label” mean in lead generation?
A vendor delivers the actual work — prospecting, qualifying, booking appointments — while your agency’s brand, not the vendor’s, is what the client sees. See the four common structures above for how they differ in practice.
How is a reseller program different from an affiliate program?
In an affiliate program you hand off the client and the vendor bills them directly; you take a commission and never control pricing. In a reseller program, you own the client relationship and the retail price, paying the vendor a wholesale rate. Smith.ai runs both as separate tracks on its own site, a useful example of the distinction.
How much does it cost to build an in-house SDR team instead of reselling white-label lead gen?
A fully-loaded US-based SDR — salary, benefits, payroll tax, tools, management, recruiting/ramp and turnover — runs $110,000 to $160,000 or more per year, per a 2026 cost breakdown from SalesHive, which notes base salary is typically only 20–30% of that total. That is the number a white-label rate needs to beat. See also AI appointment setting vs. hiring SDRs.
Do white-label lead-gen partners talk directly to my clients?
It depends on the contract, not the category. Smarter Outbound and Newson.io both describe client visibility as configurable and contractually defined. Callbox’s program leans toward co-branding rather than full invisibility. Confirm this in writing before signing — “white label” on a homepage doesn’t guarantee your client never sees the vendor’s name.
Can one white-label provider cover voice, SMS, chat and email together?
Not fully, among the six providers here. Callbox and Smarter Outbound come closest with multichannel campaigns; Synthflow is voice-only; Smith.ai is voice and chat; LeadsNow AI runs voice, SMS and chat. An agency needing every channel under one resold contract should expect to combine partners or accept a gap.
Is LeadsNow AI available as a white-label or reseller partner?
Yes, on a case-by-case commercial basis. LeadsNow AI does not publish a fixed reseller margin, revenue-share percentage or minimum commitment, because those terms are set per partner rather than standardized. Agencies interested in reselling LeadsNow AI’s pay-per-result AI appointment setting should book a scoping call rather than expect a self-serve rate card.
What should I ask a white-label lead-gen vendor about pricing?
Ask for the wholesale unit cost (per lead, per appointment or per month), whether that cost is fixed or scales with volume, what minimum term or spend applies, and whether the number quoted to you matches what’s published anywhere on the vendor’s own site. As the comparison table above shows, most vendors in this category do not publish pricing at all — that is normal for the industry, not a red flag on its own, but it means the number has to be gotten in writing before a contract is signed.
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