WhatsApp Marketing for Agencies: New Retainers | SendSeven

WhatsApp marketing for agencies: run WhatsApp, SMS, email and push for every client in a separate workspace. EU hosting in Frankfurt, DPA, no per-user fees.

Since July 2025, Meta charges every delivered template message by category and recipient country; agencies usually pass these costs through to the client and bill setup and support as a monthly retainer. With SendSeven, each client gets its own workspace, and you see usage and costs per client, with no per-user fee.

SendSeven is the messaging platform that gives agencies the complete multichannel stack: WhatsApp, SMS, email, Instagram, Messenger, live chat, Telegram and browser push. Each client gets its own workspace.

Agencies

WhatsApp Marketing for Agencies: Retainers instead of one-off projects

Your clients want WhatsApp & Co. Now you can deliver.

WhatsApp reaches over 90% open rates, email only 19%. With SendSeven you offer WhatsApp, SMS, email and browser push as a recurring service, each client in its own workspace. For five- to six-figure annual revenue from messaging retainers.

Start for free
Open rate for WhatsApp campaigns vs. 19% email
>90%
more revenue per euro with WhatsApp vs. email campaigns
5–8x
Opt-in rate via WhatsApp quizzes and lead campaigns
0%

Brands that rely on SendSeven

  • PepsiCo
  • SEWOBE
  • Auxi
  • Brazen Labs
  • Kumbolder Kraut
  • Hypatia Advisory
  • Heineken
  • Strg+
  • Versicherungskammer Bayern
  • dunatura
  • Shoplogin
  • L'Oréal Paris
  • BN Sicherheit
  • Caritas Augsburg
  • Techsys Digital
  • Ofenerlebnis
  • Maserico
Challenges

7 problems agencies have to solve in 2026

The agency market is changing faster than ever. These problems affect digital agencies across all segments, from dialogue marketing to performance and e-commerce.

01
In the GWA Spring Monitor 2026, 49% of agencies name replacement by AI as a barrier to growth.¹ Gartner expects around 90% of B2B purchases to run through AI agents by 2028.² Clients question the value of classic agency services, from content creation and social media management to paid search. Agencies need services that AI does not simply replace: an ongoing WhatsApp channel with strategy, setup, optimization and AI agents that the agency looks after.
02
Customer acquisition costs have risen by more than 222%. CPMs on Meta and Google are climbing by double digits, paid reach keeps getting more expensive for performance and social agencies, and every click has to convert. WhatsApp and browser push are owned channels: once you have won a subscriber, you can reach them again without a new ad. Those who buy right away: perfect. Those who still have questions get advice in the chat and are guided to a decision.
03
Clients actively ask for WhatsApp marketing and multichannel solutions. Agencies without a matching offer lose pitches and existing clients along with them. Competitors that have WhatsApp broadcasts, interactive quizzes and sweepstakes in their portfolio win the deals. The pressure on the portfolio grows with every quarter in which your own agency cannot offer these services.
04
Email open rates across industries sit at 17–22% and keep falling, and are further distorted by Apple Mail Privacy Protection. New subscribers are harder to win. Campaign reports show declining metrics that are hard to justify in the quarterly review. Clients are looking for complementary channels: WhatsApp delivers over 90% open rates, browser push reaches 15–20% without an email address.
05
Similar agencies everywhere: the same channels, the same tools, the same pitches. Those who offer WhatsApp marketing, interactive quiz campaigns and sweepstakes as a standalone service create a real unique selling point. New channels such as Click-to-WhatsApp ads or browser push campaigns are often out of reach for competitors. This is exactly where differentiation comes from.
06
One-off projects dominate, recurring revenue is missing. In the GWA Spring Monitor 2026, 62% of gross income still comes from project fees, down from 68% the year before.¹ Classic single-channel campaigns (email, social posts, display ads) convince clients less and less. An ongoing messaging service with WhatsApp campaigns, sweepstakes, quiz funnels and managed AI agents creates predictable income of €1,000–1,500 per client per month and long-term client loyalty instead of project churn.
07
Traffic gets generated, but the right channels for the last mile to the purchase decision are missing. Forms on landing pages convert at 3–5%. Click-to-WhatsApp ads send prospects straight into a chat, where the AI agent qualifies, advises and collects contact details. Browser push reaches website visitors without an email address at a 15–20% open rate. No form, but dialogue.
01 / 07
For every agency type

5 agency segments, one shared lever

Whether your agency specializes in dialogue marketing, CRM, performance, social media or e-commerce: multichannel messaging fits into any portfolio.

01

Dialogue and newsletter agencies

Already strong in the 1:1 channel. WhatsApp is the natural next step: over 90% open rate compared with 17–22% for email. Plus AI agents with a knowledge base as an additional service.

„Same logic, new reach: WhatsApp delivers up to 5x higher engagement rates.“
02

CRM and automation agencies

Automation flows often focus on email. SendSeven extends CRM workflows with WhatsApp as a touchpoint, via REST API, webhooks, Zapier, Make or n8n. Quizzes run as a WhatsApp Flow reach around a 30% opt-in rate for lead qualification.

„A CRM event becomes a WhatsApp message, and the integration is up in under an hour.“
03

Performance and lead gen agencies

Click-to-WhatsApp ads (CTWA) turn Meta campaigns into conversational funnels. Browser push offers retargeting without ad budget at a 15–20% open rate. Owned reach instead of rising CPMs.

„Those who convert right away: perfect. Those with questions ask them on WhatsApp.“
04

Social media agencies

Instagram DMs, Facebook Messenger and WhatsApp in one unified inbox. Interactive formats such as quizzes, sweepstakes and product advice right in the chat, beyond content posts.

„Instagram, Messenger and WhatsApp in one inbox, plus interactive campaigns as a new service.“
05

E-commerce agencies

WhatsApp newsletters with opt-in right in the shop: shipping notifications, re-engagement and personalized recommendations. Around €0.11 Meta fee per marketing template in Germany, but 5–8x more revenue per euro invested than email.

„WhatsApp and browser push as a combination of high engagement and low cost.“
The solution

One platform. All channels. For all your clients.

SendSeven is the messaging platform that gives agencies the complete multichannel stack: WhatsApp, SMS, email, Instagram, Messenger, live chat, Telegram and browser push. Each client gets its own workspace.

Instead of gluing together point solutions, you manage campaigns, conversations and AI agents for all clients from one login. Every channel becomes a new service, every service a recurring retainer.

  • WhatsApp broadcasts with segmented lists, personalized templates and campaign reports
  • One workspace per client: separate channels, contacts, campaigns and reports, and your team switches between clients with one click
  • Logo and colors per workspace, a live chat widget in the client's look and a verified sender domain for email
  • Quizzes and sweepstakes as a WhatsApp Flow: around 30% opt-in, up to 60% with sweepstakes
  • Click-to-WhatsApp ads (CTWA): Meta ads open the chat directly instead of a landing page
  • AI agent with a knowledge base that answers questions and hands over to your team
  • Browser push to subscribers, with the Push SDK on the client's domain
  • Drag-and-drop email builder with open and click tracking
  • REST API, webhooks, Zapier, Make or n8n to connect to any CRM
  • Reports per client: volume and costs per channel, sent and delivered for WhatsApp, opens and clicks for email
Start for free
>90 %
Open rate for your clients' WhatsApp campaigns
15–20 %
Open rate for marketing push, without an email address
30–60 %
Opt-in rate for WhatsApp quizzes and sweepstakes
5–8x
more revenue per euro with WhatsApp vs. email campaigns
Channel strategy

How agencies use each channel for their clients

Every channel has its strength. The art lies in the combination and in the right timing.

WhatsApp
Over 90% open rate
Use for agency clients

Campaign broadcasts, lead qualification through a quiz flow, Click-to-WhatsApp from Meta ads, advice chat for products that need consultation

When to use

Product launches, seasonal promotions, lead funnels, conversion boosts

SMS
~99% delivery rate
Use for agency clients

Time-critical notifications, appointment reminders, flash sales for your clients' end customers

When to use

Urgent messages, promotion countdowns, appointment confirmations

Email
19% open rate
Use for agency clients

Newsletters, campaigns with a drag-and-drop builder, content marketing for clients

When to use

Regular newsletters, content series, product updates, industry news

Instagram DM
Engagement rate
Use for agency clients

Community management, sweepstake responses, story interactions for social clients

When to use

Social campaigns, influencer collaborations, community interaction

Messenger
70–80% open rate
Use for agency clients

Facebook community care, customer inquiries from Facebook ads

When to use

Facebook campaigns, community support, lead capture

Browser push
15–20% open rate (marketing)
Use for agency clients

Re-engagement without an email address, content alerts, special offers: retargeting for client websites without ad budget

When to use

Blog posts, offers, stock alerts, event reminders

Use cases

How agencies sell new services with SendSeven

Every use case is a new retainer. Every channel is new revenue potential for your agency.

Problem

WhatsApp campaigns as an agency service

Clients want WhatsApp marketing, and your agency cannot deliver it. Email campaigns show falling open rates of 17–22%, and clients doubt the ROI.

Solution with SendSeven

WhatsApp campaigns as an agency service

WhatsApp broadcast campaigns through SendSeven: segmented contact lists, personalized templates and reports on sending and delivery. Sold as a monthly retainer.

WhatsApp
Result
+€1,500
Retainer/client/month

Retainer/client/month for WhatsApp campaign management

Problem

Generate and qualify leads via WhatsApp

Forms on landing pages convert at 3–5%. Little contact data, little engagement. Leads come in, but without real interaction or qualification.

Solution with SendSeven

Generate and qualify leads via WhatsApp

Interactive quizzes and sweepstakes run as a WhatsApp Flow generate leads right in the chat. The AI agent captures contact details, qualifies and passes warm leads to the team. Click-to-WhatsApp ads bring prospects straight into the funnel.

WhatsAppAI agent
Result
30% opt-in
6x more leads

compared with 3–5% for classic forms: 6x more qualified leads

Problem

Browser push as retargeting without ad budget

Performance clients pay rising CPCs for retargeting. Cookie restrictions make display retargeting less and less effective. Expensive channels with falling ROI.

Solution with SendSeven

Browser push as retargeting without ad budget

Browser push campaigns as a low-threshold retargeting alternative: one click to opt in, no email address needed. The Push SDK runs on your client's domain. Marketing pushes reach a 15–20% open rate, without ad budget.

Browser push
Result
No ads
Owned reach

A re-engagement channel without ad costs instead of expensive display ads

Problem

Click-to-WhatsApp ads as a conversational funnel

Meta ads end on landing pages with 3–5% conversion. Products that need consultation require dialogue, not forms. CPMs rise by double digits, and every click has to convert.

Solution with SendSeven

Click-to-WhatsApp ads as a conversational funnel

Click-to-WhatsApp ads (CTWA) send prospects straight into a WhatsApp conversation. The AI agent qualifies, advises and collects contact details: the ad click becomes a conversation, the conversation becomes a customer.

WhatsAppInstagram
Result
Owned leads
Owned media

Paid media becomes owned media: the leads belong to the client, not the platform

Problem

Conversational commerce for products that need consultation

Clients with high-priced products (insurance, real estate, B2B services) lose prospects on the way to the purchase decision: too many open questions, no advice.

Solution with SendSeven

Conversational commerce for products that need consultation

WhatsApp as an advice channel: product consultation right in the chat, supported by the AI agent with the SendSeven knowledge base. Appointment reminders, follow-ups and review requests run as a Flow, triggered via API or webhook.

WhatsAppAI agentLive chat
Result
Premium service
High margin

A new, high-margin retainer for agencies with consultation-heavy clients

Problem

Unified inbox for multichannel community management

Social media managers switch between Instagram DMs, Facebook Messenger and WhatsApp. Messages get lost, response times are slow, and there is no central reporting.

Solution with SendSeven

Unified inbox for multichannel community management

The unified inbox bundles Instagram DMs, Facebook Messenger, WhatsApp, email and SMS. You assign conversations to team members, and internal notes keep the team up to date.

WhatsAppInstagramMessengerEmailSMS
Result
60%
Faster replies

faster response times through a unified inbox instead of tool-hopping

ROI projection

What SendSeven brings your agency per month

Adjust the values to your agency and see your revenue potential from messaging services.

350
500 €3,000 €
New retainer revenue
+15,000 €
WhatsApp and messaging services for your clients
Secured existing clients
−6,000 €
Multichannel instead of churn: fewer cancellations
Higher campaign budgets
+4,500 €
Better KPIs justify more budget
AI and push services
+3,000 €
AI agent management and browser push management
Total potential
+€28,500
/month · €342,000/year

The calculation assumes that ~70% of your clients book messaging retainers, ~30% are retained through multichannel and ~30% use AI/push services. Actual results vary.

GDPR and trust

Data protection you can guarantee your clients

As an agency, you put your name behind the tools you recommend. SendSeven makes GDPR compliance the default.

EU hosting in Frankfurt

Your clients' data sits on servers in Frankfurt. The AI also runs in the EU, and data is not used for AI training.

Double opt-in and consent

Email with double opt-in; on WhatsApp, SMS and Telegram, contacts opt in with START and opt out with STOP.

Roles, MFA and audit log

Seven system roles and custom roles define who sees what, plus two-factor sign-in. Data is encrypted with AES-256 at rest and via TLS in transit, and owners and admins retrieve the audit log via API.

One workspace per client

Each client's data stays separated in its own workspace, and the data processing agreement under Art. 28 GDPR comes with every plan. That way you can recommend SendSeven with a clear conscience.

GDPR-compliant
EU hosting · AI in the EU
AES-256 encryption
Double opt-in (email)
Art. 28 GDPR DPA
Roles & MFA
FAQ

Frequently asked questions

What does WhatsApp marketing for agencies cost with SendSeven?
SendSeven starts at €49 a month with Basic. Agencies usually choose Professional at €79 a month, with the AI agent and Flow Builder: from Professional and in the API Only plan, you create a separate workspace for each client. On top come Meta's fee per delivered template and the SendSeven message price.³ There are no per-user fees. Try it for 14 days with 100 test messages, no credit card required.
How do agencies bill WhatsApp costs to their clients?
Since July 1, 2025, Meta charges every delivered template message. The price depends on the category (marketing, utility, authentication) and the recipient's country.³ A common model: the agency passes the message costs through to the client and bills strategy, setup, templates and ongoing support as a monthly retainer. In SendSeven you see volume and costs per client workspace, so billing stays transparent.
How do I manage several clients separately?
Each client gets its own workspace with its own channels, contacts, campaigns and reports. Team members can belong to several workspaces and switch with one click. Your clients connect their own channels through a connection link, and you can also create new workspaces via API. Meta's sending limits apply per business portfolio and range from 250 to unlimited recipients per 24 hours.⁴
Is WhatsApp marketing GDPR-compliant for clients?
Yes, if consent is in place. Meta requires an opt-in before a business sends messages and leaves the method to the business.⁵ National law usually also requires prior express consent for marketing messages. SendSeven hosts data in Frankfurt, the AI runs in the EU, and data is not used for AI training. Delivery over WhatsApp runs through Meta. This is not legal advice.
Who is the controller, and does the agency need a DPA?
As a rule, your client is the controller, the agency is the processor and SendSeven is the sub-processor. According to the EDPB, the controller must know all processors in the chain, including sub-processors.⁶ SendSeven provides a data processing agreement (DPA) under Art. 28 GDPR in every plan. Have the chain reviewed for your case, this is not legal advice.
Is the WhatsApp Business app enough, or does the client need the API?
For one or two people, the app is often enough. As soon as several employees reply, you send by segment or an AI agent should help out, you need the WhatsApp Business API. With Coexistence, the API runs in parallel to the WhatsApp Business app on the same number, in every SendSeven plan.
How do agencies win opt-ins for their clients?
Wherever customers are already in contact: a checkbox at checkout, a QR code in the store, Click-to-WhatsApp ads, comment-to-DM on Instagram or a sweepstake run as a WhatsApp Flow. What matters is a clear purpose, documented consent and opting out with STOP.
How do Click-to-WhatsApp ads work with SendSeven?
The ad on Facebook or Instagram opens a WhatsApp chat with your client directly. The chat lands in the unified inbox, the AI agent answers first questions and hands over to the team as soon as a person is needed. In the reports you see how many chats an ad brought in.

Related industries

Education & E-LearningBeauty & CosmeticsEnergy providersFitness Studios

Make multichannel your new revenue driver

Get started in under 5 minutes, with 100 test messages and no credit card. Discover how agencies unlock five- to six-figure annual revenue from messaging services with SendSeven. See all plans.

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cta.note

Sources
  1. 1. GWA Spring Monitor 2026 (March 2026, 92 agencies surveyed). 62% of gross income comes from project fees (previous year 68%), 49% name replacement by AI as a barrier to growth. gwa.de
  2. 2. Gartner, via Digital Commerce 360 (Nov 28, 2025). By 2028, around 90% of B2B purchases are expected to run through AI agents, with a volume of over $15 trillion. digitalcommerce360.com
  3. 3. Meta: WhatsApp Business Platform Pricing. Since July 1, 2025, every delivered template message is charged, and the price depends on the category and the recipient's country. developers.facebook.com
  4. 4. Meta: Messaging limits. The limits apply per business portfolio and rise in tiers from 250 through 2,000, 10,000 and 100,000 to unlimited recipients per 24 hours. developers.facebook.com
  5. 5. WhatsApp Business Messaging Policy. Businesses need an opt-in before they send messages, and the business chooses how to collect it. whatsappbusiness.com
  6. 6. EDPB: Opinion 22/2024 (Oct 7, 2024). The controller must know all processors and sub-processors in the chain. edpb.europa.eu
Read more

Guides to WhatsApp marketing for agencies

Six articles and the key terms for agencies that manage WhatsApp, SMS, email and push for their clients.

Costs

WhatsApp Business API Pricing 2026: Per-Message Cost Breakdown

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Read articleCampaigns

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Click-to-WhatsApp Ads & wa.me 2026: The Complete Guide From Click to Sale

How a Meta ad turns into a chat and what the agency controls between click and purchase.

Read articleOpt-in

WhatsApp Opt-in: 7 Strategies to Grow Subscribers in 2026

Where your clients collect consent, from checkout to a sweepstake in the chat.

Read articlePrivacy

Click-to-WhatsApp Ads GDPR-Compliant 2026: Data Chain, DPA, Cookie Banner

Who holds which role in the chain of client, agency and platform, and what belongs in the DPA.

Read articleCoexistence

WhatsApp Business App vs. API vs. Coexistence: Which Setup Fits Your SMB? (2026)

When the app is enough for a client and when the API runs in parallel on the same number.

Read article

Terms from the glossary

WhatsApp Business APIClick-to-WhatsAppOpt-inMessage templateWhatsApp Coexistence