SMS Partner vs Klaviyo: the comparison

When looking for a professional SMS sending platform, you quickly realize one thing: on paper, everyone does “SMS sending.” In reality, the differences come down to features, flexibility, and day-to-day usability. Sometimes it’s also a matter of feel! In any case, in this comparison, we put two platforms head to head: SMS Partner and Klaviyo. We give you a clear picture of the differences between the two tools, without empty promises or unnecessary jargon.

Overview of the SMS tools

SMS Partner

SMS Partner is a French platform 100% dedicated to professional SMS sending, whether for promotional or transactional messages, as well as notifications or alerts. Its simple and intuitive interface makes it easy to import contact lists, personalize messages, and schedule bulk or delayed sends. The platform also offers tracking tools to measure the effectiveness of campaigns. It strictly complies with GDPR, including automatic management of SMS STOP for commercial messages.

On the technical side, SMS Partner has an SMS and RCS API, as well as an SMPP connection, making it easy to integrate with business tools, CRMs like HubSpot, or CMSs like Shopify or WordPress. Its premium offer guarantees SMS delivery, including internationally (coverage in over 220 countries). Businesses also appreciate the ability to send transactional SMS 24/7, perfect for confirmations, reminders, or OTP codes.

The platform offers 20 free SMS to new users, allowing them to test its features before purchasing larger SMS packs. Customer support is responsive, and the emphasis is on ease of use, even for beginners.

Klaviyo

Klaviyo has established itself as one of the leading marketing automation platforms dedicated to e-commerce, combining artificial intelligence, customer data, and personalization to create omnichannel experiences. Specifically designed for B2C brands, Klaviyo enables the orchestration of email, SMS, and push notification campaigns, all from a unified interface. Its key strength lies in its ability to synchronize data in real time from over 350 integrations (Shopify, Gorgias, Meta, etc.), providing a 360° view of the customer journey and automation opportunities, such as abandoned cart follow-ups or post-purchase messages.

The solution allows brands to send targeted SMS messages, leveraging fine-grained segmentation and customer profiles enriched in real time through software integrations. SMS sending in France has only been available since 2024. Klaviyo also offers automated testing to identify the best-performing message variants, as well as intelligent send-time scheduling to maximize click and conversion rates. Note: MMS is not available in France.

Comparison table: SMS Partner or Klaviyo?

Features	SMS Partner	Klaviyo
SMS campaign sending
Web platform
Scheduled sending
Message personalization
Database rental
Number verification – HLR
SMS API (HTTP / REST)
SMPP connection
SMS receiving
Message templates
AI-assisted SMS writing
Campaign statistics
International sending	+220 countries	+20 countries
Virtual numbers
OTP SMS
SMS survey
Mail to SMS
RCS chat
Price per SMS	€0.049 excl. VAT	Subscription*
Customer support	Chat, email, phone	Tickets

*More details in the Pricing section.

Platform interfaces

SMS Partner interface

SMS Partner has a simple and intuitive interface, with a well-organized dashboard that provides easy access to the main features. The left-hand menu logically presents all the useful SMS sending options (credit purchases, contacts, campaigns, statistics, etc.), while the home page displays send status, credit balance, and the latest campaign statistics using charts. Action buttons (such as “Create a campaign” or “Import contacts”) are prominently displayed, making it easy for beginners to get started.

Beyond the clean design, the SMS platform offers advanced features accessible through the various menus, such as virtual number management, the SMS API, Mail to SMS, and RCS messaging registration.

Klaviyo interface

Klaviyo features a pleasant, modern, and minimalist interface. Since the platform is all-in-one, there is no dedicated tab for SMS sending: the different channels are mixed together. Under “Campaigns,” you’ll find email, SMS, and WhatsApp campaigns all in the same place. It’s only when clicking “Create a campaign” that you choose which channel to send on. You can also switch to a “Calendar” view instead of “List” to see at a glance the sending dates of the various campaigns.

The left-hand menu appears comprehensive, with contact databases, statistics, automations, forms, reviews, and more. This may present challenges for novice users, as a thorough exploration seems necessary to get to grips with all of Klaviyo’s features.

Pricing

SMS Partner pricing

SMS Partner offers SMS packs with no subscription or commitment. In France, the price is €0.049 per SMS, which is just under €10 for 200 SMS. Rates may vary depending on the destination: for example, €0.08 in Belgium or €0.03 in Portugal. The platform offers international coverage in over 220 countries. 20 free SMS are included upon sign-up so you can test the tool before purchasing SMS credits. Note: purchased credits have no expiration date.

Klaviyo pricing

Klaviyo does not offer SMS packs — only a monthly subscription, the price of which varies based on the number of contacts and the number of mobile messages (SMS and WhatsApp) to be sent per month. The subscription starts at $35 per month (approximately €30), for 5,000 emails and 150 SMS per month, for up to 500 contacts. You cannot choose SMS only — emails are always included in the subscription, even if you don’t plan to use them. Some options are paid add-ons, such as the AI agent, which costs $70 per month for 100 conversations. Note: if your number of contacts grows, Klaviyo automatically upgrades your subscription plan, so you risk going over budget if you don’t regularly clean up your contact database.

Key takeaways for SMS Partner

• A made-in-France platform for SMS and RCS sending, GDPR-friendly.
• SMS pack purchases with no subscription, 20 free SMS included at sign-up, with no expiration date.
• A fully featured interface with real-time statistics and ease of use.
• Advanced features such as virtual numbers, automatic SMS STOP management, AI-assisted writing, SMS surveys, and RCS chat.
• SMS and RCS APIs for easy integration with your tools, with modules compatible with many CRMs and CMSs.

Key takeaways for Klaviyo

• An American multichannel solution that lets you manage emails, SMS, and automations from a single interface.
• A bundled subscription that mandatorily includes both email and SMS, with no option to choose SMS only.
• Pricing increases with the number of contacts and messages sent, with automatic subscription upgrades.
• Advanced features are available but paid, to be added on top of the base subscription.
• The platform requires a thorough learning curve, especially for novice users.

If you have strong automation needs, Klaviyo can be a relevant choice with its 350 software integrations. However, you must also be sending emails alongside your SMS campaigns, otherwise it may not be cost-effective for you. Its focus on marketing automation makes it a relatively expensive solution, better suited to large international organizations.

For a platform dedicated to SMS sending, SMS Partner is the better choice, with its advanced yet easy-to-use features. We also offer integrations with leading market tools (HubSpot, Salesforce, WordPress, Shopify, Magento, PrestaShop, Make, Zapier, etc.) and APIs for your business software.

Check out our other SMS platform comparisons:
SMS Mode
Spot Hit
SMSFactor
AllmySMS
OVH SMS
Twilio
Brevo
Sarbacane
Octopush
HexaSMS
Vonage