In short: Badsender comes out on top. It suits brands that want to make their email marketing and CRM more reliable, structured and scalable. Dolist follows, for companies and public bodies that send email and SMS campaigns and demand security and deliverability. Markentive completes the podium, for B2B companies building their marketing automation and CRM around HubSpot. The other seven agencies meet more specific needs: e-commerce, choosing a tool, monetising databases, customer data or lead generation.
- Badsender: For brands and organisations that want to make their email marketing and CRM more reliable, structured and scalable.
- Dolist: For companies and public bodies that want high-performing, secure email and SMS campaigns with strong deliverability.
- Markentive: For B2B companies that want to structure their marketing automation and CRM around HubSpot.
- ThirtyFive: For e-commerce brands that want to turn email marketing and retention into a profitable growth driver.
- Belacom: For companies and SMEs that want to choose, integrate and run an email marketing and marketing automation tool.
- Mindbaz: For media outlets, publishers and agencies that want to monetise their email databases with well-managed deliverability.
- Avanci: For brands that want to use their customer data to build loyalty and personalise their CRM campaigns.
- Email Rocks: For B2B or B2C companies that want to make their deliverability more reliable and automate their email marketing.
- Webrivage: For B2C and B2B advertisers, particularly in insurance, energy, telecoms or finance, that want high volumes of leads through email marketing.
- Cartelis: For companies that want to structure their CRM and use their customer data for higher-performing relationship campaigns.
Updated on 2 November 2026.
Why hire an email marketing agency in 2026?
Email remains a profitable channel. According to Litmus's State of Email 2025 report, 35% of marketing leaders report a return of 10 to 36 dollars for every dollar invested. A further 30% report a return of 36 to 50 dollars. But the messages still have to land in the inbox.
On that front, the rules have tightened. Since February 2024, Google and Yahoo have required bulk senders to use SPF, DKIM and DMARC authentication. Google sets the threshold at 5,000 emails per day. Since 5 May 2025, Microsoft has applied comparable requirements to senders of more than 5,000 emails per day to Outlook, Hotmail and Live. A poorly configured domain can see its emails filtered as spam or rejected.
Business leaders mainly fear three things. First, paying an agency that simply sends out newsletters. Second, being locked into a tool chosen for them. Third, never knowing what the channel really brings in. A good partner addresses all three concerns before you sign.
How did we choose these 10 agencies?
This ranking is based solely on what each company publishes itself (its website, its methodology and client reference pages), as read at the time of the update. Four criteria counted:
- Deliverability: We favoured agencies able to set up and monitor authentication, sender reputation and database hygiene.
- Data and CRM: The agency must know how to use your customer data to segment, personalise and automate, not just design templates.
- Clear positioning: Each agency selected has a distinct speciality, such as B2B, e-commerce, the public sector or acquisition, which makes your choice easier.
- Results-driven management: We selected teams that link their work to business metrics, such as revenue, retention or leads generated.
The 10 Best Email Marketing Agencies in France (2026)
1. Badsender
Badsender describes itself as a committed band of specialists in email marketing, deliverability and CRM. The agency works across the entire email chain: auditing practices, segmentation, marketing pressure, resolving deliverability incidents, email design systems, template integration, accessibility, marketing automation, copywriting and campaign orchestration. It also trains your teams. It works with your existing tools and industrialises your production through a mega HTML template, your sending platform's email builder, a framework or its own email builder, LePatron. Finally, it shares its knowledge through a blog, guides, live sessions and podcasts.
Strengths:
- Expertise covering the entire email chain, from consultancy to production
- Client testimonials cited: Effy, Mediapart, L'Équipe, WWF, Etam
- Responsible approach: CSR charter, Sobriété et Marketing podcast
Who it's for: For brands and organisations that want to make their email marketing and CRM more reliable, structured and scalable.
2. Dolist
Dolist publishes Campaign, a French email and SMS marketing, automation and transactional platform, with the Welkom Editor email builder. It presents itself as a deliverability expert: OPERA monitoring, dedicated sending infrastructure, involvement in M3AAWG and Signal Spam. Its data and marketing teams also support you with a modular offering: strategy consultancy, deliverability consultancy, an HTML Studio for your templates and landing pages, API connectivity and training. Data is hosted in France, within a GDPR framework overseen by a DPO.
Strengths:
- In-depth deliverability expertise, with automatic monitoring of sends
- Sovereign platform hosted in France, GDPR-compliant
- End-to-end support: strategy, HTML Studio, training, deliverability
Who it's for: For companies and public bodies that want high-performing, secure email and SMS campaigns with strong deliverability.
3. Markentive
Markentive presents itself as a CRM integrator focused on growth. The agency deploys HubSpot, including the Marketing Hub dedicated to marketing automation, and integrates it with existing tools such as an ERP or Salesforce. It also offers SalesOps and Data consulting, Growth Marketing, AI integration and web design. Its method involves design workshops followed by a tailored technical implementation. Its consultants have between 3 and 15+ years of expertise. It also trains teams on HubSpot.
Strengths:
- HubSpot Elite Partner, accredited partner since 2013
- 100% of accreditations across the entire HubSpot suite
- Rated 5.0 from more than 500 client reviews
Who it's for: For B2B companies that want to structure their marketing automation and CRM around HubSpot.
4. ThirtyFive
ThirtyFive is a CRM agency dedicated to e-commerce brands. It structures, analyses and manages their retention strategy with a data-driven, bespoke approach. Its offering covers CRM strategy (segmentation, lifecycles, automated flows), business-focused email campaigns, SMS and WhatsApp marketing, as well as CRM audits with a prioritised roadmap. The agency presents itself as a Klaviyo expert. Its ambition: to drive your CRM growth, not just your campaigns, and turn your data into decisions.
Strengths:
- More than fifty e-commerce brands supported, according to the agency
- Comprehensive approach: email, SMS, WhatsApp and CRM audits
- Numerous named client testimonials, including Dijo Paris and Spring
Who it's for: For e-commerce brands that want to turn email marketing and retention into a profitable growth driver.
5. Belacom
Belacom presents itself as a consultancy agency and marketing automation solutions integrator. Its method follows three steps: audit and choice of solution, integration into your digital ecosystem with training for your teams, then day-to-day support and advice. Its expertise covers email, SMS, push notifications, CRM and data, wallet and WhatsApp. It works with tools such as Brevo, Klaviyo, Salesforce and ActiveCampaign, and offers an online solution comparison tool.
Strengths:
- A dedicated consultant introduced to each client from the outset
- Clear method: audit, integration, training, support
- Numerous client testimonials, including Pyrenex, Studyrama and Trigano
Who it's for: For companies and SMEs that want to choose, integrate and run an email marketing and marketing automation tool.
6. Mindbaz
Mindbaz is an email marketing sending solution that gets your messages into the inbox thanks to its deliverability expertise. Since 2013, its experts have supported clients with an easy-to-use platform, a targeting and segmentation engine, dynamic content and AI-generated subject lines. The tool is GDPR-compliant and French, hosted in French data centres. Mindbaz also offers SMS, email training, email marketing audits and migration support, with no long-term commitment.
Strengths:
- Deliverability expertise and relationships with ISPs going back more than ten years
- French tool, GDPR-compliant, continuously monitored data centres
- Tailored support, training and email marketing audits
Who it's for: For media outlets, publishers and agencies that want to monetise their email databases with well-managed deliverability.
7. Avanci
Avanci presents itself as a Data and CRM consultancy agency specialising in customer loyalty. It gathers, unifies and cleans your customer data, analyses it and then activates it for targeted, effective campaigns. Its support ranges from strategic advice to operational implementation: choosing tools such as a CDP, loyalty programmes, automated flows. It also offers data training, AI agents and a data maturity audit to measure and improve the ROI of your campaigns.
Strengths:
- Comprehensive data approach, from collection to campaign activation
- Named client testimonials, including a fifteen-year partnership
- Implementation of automated flows and loyalty programmes
Who it's for: For brands that want to use their customer data to build loyalty and personalise their CRM campaigns.
8. Email Rocks
Email Rocks helps companies improve the performance of their email campaigns and structure their CRM strategy. Its offering covers audits, migration and IP warm-up plans, email and SMS campaign management, email design, multilingual copywriting, automation workflows and deliverability dashboards. Training is available on Brevo and Klaviyo. The approach aims to be multi-platform and objective. A dedicated senior expert leads each project, backed by a network of specialist experts.
Strengths:
- Brevo Elite Partner, Klaviyo Silver Partner and GetResponse Partner
- More than 100 B2B and B2C clients supported since 2006
- In-depth expertise in deliverability, audits and platform migration
Who it's for: For B2B or B2C companies that want to make their deliverability more reliable and automate their email marketing.
9. Webrivage
Webrivage presents itself as a French digital acquisition expert since 2009. The agency collects and uses marketing data to generate qualified B2C and B2B leads, compliant with GDPR and Bloctel. Its emailing offer runs through the Bonjour Data platform, which brings together SMS, RCS and email campaigns, and through email affiliate marketing, with more than 160M emails sent per month, according to the agency. Its method follows four steps: needs analysis, collection strategy, campaign launch, then monitoring and optimisation.
Strengths:
- More than 20 million opt-in profiles claimed in its database
- More than 120 certified proprietary databases for email affiliate marketing
- Time-stamped consent traceability, GDPR and Bloctel compliance
Who it's for: B2C and B2B advertisers, particularly in insurance, energy, telecoms or finance, who want high volumes of leads through emailing.
10. Cartelis
Cartelis is a consultancy specialising in making the most of marketing data: CRM, analytics, data engineering, CDP and relationship marketing. It helps you align strategic vision with pragmatic execution, with measurable impact. On the activation side, it maps customer journeys and deploys bespoke scenarios. It also manages marketing pressure with a saturation score and optimises the orchestration of multichannel campaigns. AI is used for hyper-personalisation and behaviour prediction.
Strengths:
- CRM marketing and marketing automation expertise
- Marketing pressure management with a saturation score
- Churn reduction through automated re-engagement of at-risk segments
Who it's for: Companies that want to structure their CRM and use their customer data for higher-performing relationship campaigns.
The 10 Compared in One Table
| # | Company | Who it's for | Key strength | Website |
|---|---|---|---|---|
| 1 | Badsender | For brands and organisations that want to make their emailing and CRM more reliable, structured and scalable. | Expertise covering the entire email chain, from consultancy to production | badsender.com |
| 2 | Dolist | For companies and public bodies that want high-performing, secure email and SMS campaigns with strong deliverability. | In-depth deliverability expertise, with automatic monitoring of sends | dolist.com |
| 3 | Markentive | For B2B companies that want to structure their marketing automation and CRM around HubSpot. | HubSpot Elite Partner, accredited partner since 2013 | markentive.com |
| 4 | ThirtyFive | For e-commerce brands that want to turn emailing and retention into a profitable growth driver. | More than fifty e-commerce brands supported, according to the agency | thirtyfive.fr |
| 5 | Belacom | For companies and SMEs that want to choose, integrate and manage an emailing and marketing automation tool. | A dedicated consultant introduced to each client from the outset | belacom.fr |
| 6 | Mindbaz | For media outlets, publishers and agencies that want to monetise their email databases with well-managed deliverability. | Deliverability expertise and relationships with ISPs going back more than ten years | mindbaz.com |
| 7 | Avanci | For brands that want to use their customer data to build loyalty and personalise their CRM campaigns. | Comprehensive data approach, from collection to campaign activation | avanci.fr |
| 8 | Email Rocks | For B2B or B2C companies that want to make their deliverability more reliable and automate their emailing. | Brevo Elite Partner, Klaviyo Silver Partner and GetResponse Partner | email-rocks.com |
| 9 | Webrivage | For B2C and B2B advertisers, particularly in insurance, energy, telecoms or finance, who want high volumes of leads through emailing. | More than 20 million opt-in profiles claimed in its database | webrivage.com |
| 10 | Cartelis | For companies that want to structure their CRM and use their customer data for higher-performing relationship campaigns. | CRM marketing and marketing automation expertise | cartelis.com |
What Should You Check Before Signing?
- Ask how the agency checks and maintains SPF, DKIM and DMARC compliance for your sending domain.
- Check how it handles consent and GDPR compliance for your contact databases.
- Find out whether the agency is independent of software vendors or paid as a platform partner.
- Get it in writing who owns the accounts, data and templates if the partnership ends.
- Clarify the KPIs tracked, how often reports are delivered and how billing works before committing.
Where Does Esekai Fit In?
Esekai is not an emailing agency and does not appear in this ranking. It is a Paris vertical video studio founded by Tony Lo: creative ads, UGC, content for TikTok, Reels and YouTube Shorts, plus TikTok Ads and Meta Ads campaigns. More than 350 brands supported in 3 years. Our videos attract new contacts; the agencies ranked here turn them into loyal customers through email. Discover Esekai.
Conclusion
There is no single best emailing agency in absolute terms. There is the one that fits your model – B2B, e-commerce or public sector – your tool and your maturity. Start from your main need. Check deliverability and data ownership. Then compare several proposals before signing.
Honourable Mentions: 10 More Worth Knowing
| Company | Who it's for | Website |
|---|---|---|
| Isoskele | For major brands that want to put their data assets to work in their marketing campaigns. | isoskele.fr |
| Seventic | For B2B companies that want to integrate emailing into multichannel prospecting that generates qualified meetings. | seventic.com |
| Alteo | For companies that want to entrust their website, hosting and email campaigns to a single provider. | alteo.fr |
| Churchill | For companies that want to connect their website, CRM and email campaigns within a single agency. | agence-churchill.fr |
| Axiome | For B2C brands that want to reach new customers by email using targeted lists. | axiome.fr |
| Leadiya | For advertisers who want to acquire qualified leads through emailing, or publishers looking to monetise their opt-in databases. | leadiya.com |
| Kalélia | For SMEs and mid-sized companies in western France that want to integrate emailing into a comprehensive digital strategy. | kalelia.fr |
| UpByWeb | For companies in western France that want to integrate emailing into an overall acquisition strategy. | upbyweb.com |
| Ividence | For advertisers who want to reach a qualified audience through premium newsletters, and for publishers who want to monetise them. | ividence.com |
| Ellevate | For SMEs and mid-sized companies that want to connect their emailing to a digital strategy designed for the AI era. | ellevate.fr |
Does your company deserve a place in this ranking? Write to us at contact@esekai.fr: we read every submission.
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Frequently Asked Questions
- How much does an emailing agency cost?
- It depends on the model you choose. An audit, a template redesign or a tool integration is often billed per project. Campaign management tends to be on a monthly retainer. Acquisition agencies, such as those that generate leads, may charge by volume or on a performance basis. Ask for a detailed, itemised quote and compare offers on a like-for-like scope.
- Should I use an agency or an in-house emailing tool?
- A tool is enough if your team has the time, the technical skills and a clear strategy. An agency becomes useful when deliverability drops, when automated scenarios stall or when nobody is really making use of customer data. Many companies combine the two: the agency sets things up and trains the team, then the in-house team takes over.
- What is deliverability and why does it matter so much?
- Deliverability is the ability of your emails to land in the inbox rather than in spam. It depends on your domain authentication, your sender reputation, the quality of your database and recipient engagement. Since Google, Yahoo and Microsoft tightened their rules, a single technical flaw can block an entire campaign, however good it is.
- How long does it take for an emailing agency to deliver results?
- Technical fixes, such as domain authentication or database cleaning, often improve deliverability quickly. Automated scenarios and segmentation take longer: you need to collect data, test, then adjust. Ask the agency for a precise timeline, with dated milestones and the expected KPIs at each stage.