The best agencies to support a brand on Omnisend are, in order: 1. datashake, 2. Badsender, 3. Emailio, 4. The Modern Letter, 5. Churchill. datashake takes the top spot thanks to its approach that connects paid acquisition, email, SMS, and WhatsApp to drive revenue.
Omnisend allows you to unify email, SMS SMS, and push notifications within the same automated scenarios. But having the right tool isn't enough: strategy, deliverability, and execution are what make the difference.
Delegating the management of your campaigns to experts allows you to set up robust automations, protect your sender reputation, and improve your return on investment. Here is our selection, along with the criteria for choosing and the questions to ask yourself before signing.
Comparison of the best Omnisend agencies
Why choose Omnisend for e-commerce?
Omnisend is a marketing automation platform designed for e-commerce, often compared to Klaviyo. Its main strength lies in its ability to combine email, SMS, and web push notifications within the same automated scenarios (workflows). To help you choose between the two tools, check out our Klaviyo vs Omnisend comparison.
The platform integrates with major e-commerce solutions, such as Shopify, WooCommerce, or BigCommerce, to leverage browsing and purchase data. An expert agency then activates levers such as multichannel abandoned cart recovery, product recommendations, and RFM segmentation.
{{audit-primary="/cta"}}
Criteria for choosing your Omnisend agency
With the growing number of providers, evaluate several technical and strategic elements before committing. Three criteria matter more than the others.
Technical and strategic mastery of the tool
Ask the agency about its concrete experience with Omnisend or equivalent tools, such as Klaviyo or Brevo. E-commerce automation logic is transferable from one tool to another, but the agency must know how to manage your integrations, data flows, and contact migration.
Also, verify their mastery of deliverability: domain authentication, gradual ramp-up of sending volumes, and complaint monitoring. This is a prerequisite for meeting the requirements of email providers like Gmail.
Analysis of case studies and results
A portfolio is a direct reflection of an agency's competence. Look for quantified and verifiable results: improvements in repeat purchase rates, revenue per email, or the share of revenue generated by CRM.
Reviews published on platforms like Trustpilot or Trustfolio are also good indicators of the quality of support. Ask to speak with a current client if possible.
The level of creative personalization
A good agency doesn't just set up mailings. They support you with the copywriting and design of your templates, and leverage Omnisend's interactive forms (spin-to-win wheels, discount codes) while respecting your brand's visual identity.
{{rdv-primary="/cta"}}
The detailed ranking of Omnisend agencies
1. datashake: the benchmark for e-commerce CRM growth
At the top of this ranking, datashake stands out for its comprehensive approach to growth. Launched by two former employees of Google's European headquarters, the group brings together over 100 experts, has supported more than 1,000 advertisers, and manages €500M in media spend.
datashake doesn't just send newsletters: the team builds retention ecosystems linked to paid acquisition. SEA and SMA insights guide CRM segmentation, and every acquired contact enters scenarios designed for repeat purchases.
On Omnisend, the support covers the entire cycle:
- Audit of existing setups and a ramp-up plan for mailings to ensure deliverability.
- Creation of automated scenarios that combine email and SMS: welcome, abandoned cart, post-purchase, and reactivation.
- End-to-end campaign design, with an integrated creative studio.
- Deployment of complementary channels such as WhatsAppto reach customers wherever they are.
- Reliable measurement, with tracking adapted to CNIL regulations regarding tracking pixels.
At Odaje, datashake implemented welcome, abandoned cart, and post-purchase CRM workflows as part of anomnichannel acquisition strategy. The goal: to make acquisition profitable through repeat purchases and customer loyalty.
Who is it for? E-merchants, D2C brands, and scale-ups that want to manage acquisition and retention with a single team.
Key strength: the synergy between advertising, CRM, and data, in the service of revenue.
2. Badsender: email expertise and deliverability
Badsender is a French agency specializing in the email channel. They cover the entire chain: tool selection, deliverability, consulting, targeting, marketing pressure, email design systems, statistical analysis, copywriting, design, and integration.
Their support in choosing a new campaign management tool makes them a relevant partner before or during a migration to Omnisend. The agency also publishes a manifesto and a CSR charter.
Who is it for? High-volume brands that want to make their deliverability and practices more reliable.
Key strength: comprehensive email expertise, platform-agnostic.
3. Emailio: e-commerce retention
Emailio is an email marketing agency dedicated to e-commerce, covering everything from CRM strategy to creative production. They have developed Retain App, their own CRM intelligence tool, and publish case studies on the share of revenue generated by email for their clients.
The agency is a Klaviyo Gold Partner and prides itself on focusing on a single platform. As such, they are particularly relevant for a brand currently on Omnisend that is considering a migration to Klaviyo.
Who is it for? E-commerce merchants who want to make email a major revenue channel.
Key strength: an approach focused on revenue per customer.
4. The Modern Letter: a focus on content
The Modern Letter is an e-commerce email marketing agency that designs emails tailored to every stage of the customer journey. Their team brings together CRM managers, copywriters, and designers with HTML integration skills.
The agency also offers training to help teams become autonomous with their email marketing tools. Their client base consists primarily of D2C brands that are highly attentive to their brand image.
Who is it for? D2C brands that want polished emails, from copy to design.
Key strength: the alliance of copywriting and design.
5. Churchill: the website and email together
Churchill is a web agency based in Paris and Lyon, specializing in the creation and redesign of websites, particularly e-commerce sites using WooCommerce. It also offers web marketing, inbound marketing, and email marketing services.
The agency highlights a team of experts divided by specialty. It is suitable for companies that want to handle their WooCommerce store and their email campaigns with a single provider.
Who is it for? SMEs that are redesigning their e-commerce site and launching their email strategy.
Key strength: a global vision of the site and acquisition.
The concrete benefits of external support
Working with a qualified agency on Omnisend changes the way you interact with your audience. First, you save time: configuring Omnisend, while intuitive, requires expertise to correctly connect data flows (tracking, catalog synchronization).
You then move from mass communication to an individualized approach. The agency segments your inactive buyers, VIP clients, and prospects to send them cross-channel scenarios, for example, an email followed by a reminder SMS if there was no click.
Finally, an agency helps you comply with an increasingly strict framework. Gmail's requirements regarding spam complaints and the CNIL's recommendations on tracking pixels make it necessary to review consent collection and performance measurement.
Conclusion: accelerate your e-commerce growth
Leveraging your first-party data through tools like Omnisend is one of the best defenses against rising advertising acquisition costs. A well-configured platform engages, re-engages, and retains your customers continuously.
Technology does not replace strategy: it is the alliance of a good tool and an experienced agency that creates a competitive advantage. If you want to turn your contact database into a source of recurring revenue, datashake positions itself as the ideal partner to bridge acquisition and retention.
FAQ
How do I know if Omnisend is right for my e-commerce store?
Omnisend is particularly suitable if your store runs on Shopify, WooCommerce, or BigCommerce, thanks to its integrations. If you want to combine email, SMS, and push notifications in a single scenario without coding, it is one of the most comprehensive tools on the market.
What budget should I plan for outsourcing the management of my Omnisend account?
The cost of an agency varies depending on the scope of the project. Expect to pay on average between €1,500 and €3,500 for the initial setup (audit, template creation, implementation of main scenarios), then around €1,000 to €1,500 per month for ongoing management and optimization.
How do I migrate to Omnisend without losing my data?
Cleanly export your contact database from your old tool (Mailchimp or Klaviyo, for example) with all consent statuses. An agency will then assist you in authenticating your domain, recreating your automated scenarios, and gradually increasing sending volumes to protect your deliverability.
What results can you expect from an Omnisend agency?
A good agency will improve your click-through rate, reduce cart abandonment, and increase the purchase frequency of your existing customers. Results depend on your industry, the size of your database, and your starting point: ask for case studies comparable to your situation.
Should you choose Omnisend or Klaviyo?
Both tools cover email and SMS for e-commerce, with differences in features, pricing, and ecosystem. The right choice depends on your contact volume, your CMS, and your segmentation needs: an agency can help you decide before you migrate.
.png)