SStammer.ai

Stammer.ai suits small and mid-size marketing agencies that want to add AI chat and phone agents to their service menu under their own brand. White labeling starts at $99 a month on the Pro plan, which includes five chat and five voice agents, client sub-accounts and the ability to resell usage at prices the agency sets.

The platform has grown from 2,600 deployed agents in January 2024 to more than 35,000 live agents and 1,300 agencies, according to Stammer.ai. Its Trustpilot score of 3.2 from 11 reviews shows room to improve support and billing reliability. Stammer.ai scores 8.4/10 on our scale.

Stammer.ai by the Numbers

Stammer.ai’s own pages and its Trustpilot profile supply these figures.

The jump from 2,600 deployed agents in early 2024 to 35,000 live agents shows agencies kept adding clients through 2024 and 2025. Divided across 1,300 agencies, that is an average of about 27 live agents per agency.

The Trustpilot sample is small. Eleven reviews cannot represent 1,300 agencies, but the themes, quick fixes on one side and billing or reliability problems on the other, are useful things to test during a trial.

The founder’s background explains the product’s shape. Ross Fledderjohn ran SiteRight, a web development and digital marketing agency working across Shopify, Webflow, WordPress and HighLevel, for about ten years. He conceived Stammer.ai in April 2023 as white-label AI software for agencies like his own, showed a first version to agency owners in May and released version 1.0 in July. Free weekly office-hours calls for users followed that autumn.

How Agencies Run Client Agents on Stammer.ai

The agency owns the account, builds the agents and controls what each client sees and pays.

Branding the Platform

On Pro White Label, the agency removes all Stammer.ai branding and uses its own domain, logo and colors. Clients log in to what looks like the agency’s own software and never see Stammer.ai.

Building Chat Agents

The agency loads a client’s information into a knowledge base for the chat agent; an extra one-million-character knowledge base costs $5 a month. The agent can run on the client’s website, WhatsApp, Instagram DMs, Facebook Messenger or a custom channel through the API. It answers questions, qualifies leads, captures names and emails, books appointments into a connected calendar and hands off to a person when needed.

Building Voice Agents

Voice agents answer inbound calls, run outbound campaigns, follow up with leads and send appointment reminders. They can transfer a caller to a human and stand in for voicemail. Extra concurrent calls cost $15 a month each.

Handing Off to Staff

Agents do not have to finish every conversation. Chat agents can pass a conversation to a person, and voice agents can transfer a live call. Agencies usually set handoff rules per client, for example sending billing questions or complaints to the front desk.

Client Wallets and Reporting

Each client has a sub-account with a branded dashboard showing calls, chats, leads and bookings in real time. Clients pre-fund a wallet, and usage is charged at the prices the agency sets. Stammer.ai says it takes no revenue share, so the margin between the agency’s price and Stammer.ai’s usage rate stays with the agency.

Picking Models and Setting Prices

Usage costs depend on the model behind each agent. Chat messages run from about $0.0009 to $0.01 or more each, and voice minutes from $0.11 to $0.17. Agencies choose the model per agent, so an FAQ bot can use a low-cost model while a sales agent on the phone uses a more capable one.

The agency then sets the client price for replies, voice minutes and agents. Because clients pre-fund wallets, the agency is paid before usage happens, which reduces the risk of unpaid bills.

Integrations and the White-Label API

Stammer.ai lists more than 15 integrations, naming GoHighLevel and Zapier, and offers webhooks plus a white-label API for custom workflows. A booked appointment or captured lead can be sent to a client’s CRM through Zapier or a webhook, and agencies with developers can build their own client portals on the API.

A Dental Clinic Launch, Step by Step

An agency signing a dental clinic might create a sub-account, load the clinic’s services and hours into the knowledge base, and deploy a website chat agent that books cleanings into the clinic’s calendar. It then adds a voice agent to answer after-hours calls and send reminders the day before each appointment. The clinic tops up its wallet each month, and the agency checks the dashboard to report on bookings.

Stammer.ai Plans, Add-Ons and Usage Rates

Stammer.ai publishes its plan prices and usage rates. Yearly billing saves 20%.

Add-ons include extra chat or voice agents at $10 a month, extra concurrent calls at $15 a month and a one-million-character knowledge base at $5 a month. Usage on each model costs about $0.0009 to $0.01 or more per chat message and $0.11 to $0.17 per voice minute. Trials last 7 days on Standard and 14 days on Pro White Label, and both need a card.

Three Agency Budgets on Stammer.ai

• Single business on Standard: 1,000 replies and 300 voice minutes a month cost $49 plus $5 for 500 extra replies and $18 for 180 extra minutes, or $72.
• Agency with ten clients on Pro: ten chat and ten voice agents means ten agents beyond the five-and-five included, at $10 each, so the platform costs $199 a month before usage.
• Voice usage for those ten clients: at 300 minutes each, Stammer.ai’s usage cost runs $330 to $510 a month depending on the voice model, which the agency recovers from client wallets at its own prices.

Paying yearly cuts Pro to about $79.20 a month, or $950.40 a year, based on the stated 20% discount.

Spreading the Platform Fee Across Clients

In the ten-client example, the $199 platform cost works out to $19.90 per client each month before usage. Each new client with one chat and one voice agent adds $20 in agent fees once the included agents are used, so the agency’s monthly price per client needs to cover that plus its own time for setup and reporting.

Model choice also moves the bill. In the ten-client voice example, running every client on the $0.11 model, compared with the $0.17 model, saves $180 a month on usage.

Stammer.ai Compared With Vendasta, HighLevel and Synthflow

Each of these lets agencies or resellers put AI agents in front of clients.

Stammer.ai’s $99 white-label plan matches Vendasta’s chat entry price and includes five voice agents, while Vendasta’s voice receptionist starts at $499 a month. Agencies already invested in HighLevel may prefer its built-in AI Employee, and agencies serving large call centers may need Synthflow’s enterprise compliance. More options are on our white-label agent platforms and agency pages.

During trials, compare the same three things on each platform: how a client tops up and is billed, how fast a voice agent answers and transfers a call, and what the client dashboard shows. Those decide whether the agency can sell the service with confidence.

Agencies That Fit Stammer.ai

• Web and marketing agencies adding AI services: the $99 Pro plan covers ten agents and full rebranding.
• Agencies serving local businesses: booking, reminders and missed-call handling suit clinics, salons and home services.
• Agencies using GoHighLevel: Stammer.ai lists a GoHighLevel integration alongside Zapier.
• Resellers who want to set margins: client wallets and agency-set prices make resale part of the product.

Agencies new to AI services also benefit from the office-hours calls Stammer.ai started in 2023, which give a place to ask setup questions before a client launch.

Agencies That May Prefer Another Platform

• Agencies serving healthcare or finance clients with strict rules: Stammer.ai states GDPR compliance; HIPAA or SOC 2 needs should be confirmed first.
• Call centers with thousands of daily calls: an enterprise voice platform with published certifications may fit better.
• Businesses that do not resell: the Standard plan works for direct use, but many features target agencies.
• Agencies that want a free plan to experiment: both trials need a card, and there is no free tier after the trial ends.

Stammer.ai Billing, Support and Data Points to Test

Test the wallet flow during the trial. One Trustpilot reviewer reports duplicate charges when clients recharged wallets, and others mention wrong balances. Run a few top-ups and refunds with a test client before onboarding paying ones.

Plan for support response times. Reviewers describe a responsive team that often fixes issues within a day or two, but some say replies stall on harder problems. Agencies carry the client relationship, so a fallback plan for outages protects them.

Watch for spam sign-ups. One reviewer says spam registrations created unwanted sub-accounts; agencies should ask how to restrict sign-ups on their white-label domain.

Check compliance needs per client. The site states GDPR compliance, and Enterprise adds SSO. Clients in regulated fields may need documents Stammer.ai would have to supply on request.

Model choice drives margins. Voice minutes range from $0.11 to $0.17 by model, so the agency’s resale price should be set per model, not as one flat rate.

Keep client data portable. Agencies should export conversation logs, leads and bookings on a schedule, so a client’s history survives if the agency later changes platforms.

Stammer.ai Gives Small Agencies an Affordable White-Label Start

Stammer.ai earns 8.4/10 on our scale. It offers full white labeling at $99 a month, chat and voice agents in one place, published usage rates and a resale model where agencies keep their margin. It could improve billing reliability, support consistency and published compliance, which reviewers and buyers in regulated fields will look for.

For an agency starting to sell AI agents to local businesses, Stammer.ai is an affordable way to launch under its own brand. Agencies should use the 14-day Pro trial to test wallets, calls and support before signing clients. A good trial plan is one internal test client, one friendly real client and a written checklist covering bookings, call transfers, wallet top-ups and the reports the client will see each month.

Agencies that grow past dozens of clients should talk to Stammer.ai about Enterprise early. Custom integrations and SSO come with that plan, and larger agent counts change the economics of the $10-per-agent add-on.

Agency Questions About Stammer.ai

How Much Does Stammer.ai White Label Cost?

Pro White Label costs $99 a month, or about $79.20 a month billed yearly. It includes five chat and five voice agents, with extra agents at $10 a month each.

Does Stammer.ai Take a Cut of Client Revenue?

Stammer.ai says agencies keep 100% of what they charge. The agency pays Stammer.ai’s usage rates and sets its own prices to clients through prepaid wallets.

Can Stammer.ai Agents Make Phone Calls?

Yes. Voice agents answer inbound calls, run outbound campaigns and lead follow-ups, send appointment reminders and transfer callers to staff. Voice usage costs $0.11 to $0.17 per minute depending on the model.

Is There a Free Trial of Stammer.ai?

Standard has a 7-day trial and Pro White Label a 14-day trial. Both need a credit card, and there is no free plan. Agencies can use the Pro trial to build agents for a test client and check wallets, calls and reporting before the first charge.

How Does Stammer.ai Compare With HighLevel’s AI Employee?

HighLevel’s AI Employee lives inside the HighLevel CRM and costs $50 a month per sub-account on top of a HighLevel plan. Stammer.ai is a separate white-label platform that integrates with GoHighLevel and charges $99 a month for ten agents.

Which Channels Do Stammer.ai Chat Agents Support?

Websites, WhatsApp, Instagram DMs, Facebook Messenger, the API and custom channels. Chat agents can capture contact details, book appointments and hand conversations to a person.

Who Founded Stammer.ai?

Co-founder and chief executive Ross Fledderjohn started Stammer.ai in 2023 after about a decade running SiteRight, a web development and digital marketing agency.