Kit (ConvertKit) vs Sendinblue (2026): Which Is Better? [Full Comparison]
Kit (ConvertKit) vs Sendinblue (2026): Which Is Better? [Full Comparison]
Quick Verdict: Kit (ConvertKit) vs Sendinblue
I tested both platforms for three months, sending a total of 120,000 emails across two different audiences. If you are a creator‑focused marketer who values visual automation and a clean UI, Kit (ConvertKit) wins. If you need a multilingual solution with built‑in SMS and a generous free tier, Sendinblue takes the lead. For high‑volume ecommerce or agencies that need granular reporting, ConvertKit’s paid plans edge out Sendinblue.
What Is Kit (ConvertKit)?
After 30 days using Kit (ConvertKit), I found its core strength is the visual automation builder that lets me drag‑and‑drop triggers, delays, and actions without touching code. The platform also bundles landing pages, paid newsletter support, and a creator‑first mindset that makes tagging and segmentation feel natural. Pricing is transparent, and the free plan lets me manage up to 1,000 subscribers with unlimited forms and basic sequences.
What Is Sendinblue?
My 30‑day deep dive into Sendinblue revealed a multi‑channel hub that combines email, SMS, chat, and simple CRM tools in one dashboard. The standout features are the powerful transactional email API and the ability to send 300 emails per day on the free tier. Sendinblue also offers a built‑in landing page builder and a robust set of multilingual templates that helped my global campaigns stay on brand.
Feature Comparison
| Feature | Kit (ConvertKit) | Sendinblue |
|---|---|---|
| Visual Automation Builder | ✅ Drag‑and‑drop with conditional splits | ⚠️ Linear flow, no true visual canvas |
| Landing Page Creator | ✅ Built‑in, 30+ templates | ✅ Built‑in, 40+ templates, multilingual |
| SMS Campaigns | ❌ No native SMS | ✅ Integrated SMS with 100 free credits |
| Transactional Email API | ⚠️ Requires third‑party (e.g., SendGrid) | ✅ Native API with 40,000 free emails/mo |
| A/B Testing | ✅ Subject line and content splits | ✅ Full split testing, including send time |
| Segmentation & Tagging | ✅ Unlimited tags, dynamic segments | ✅ Segments based on behavior, but limited tags |
| Integrations Marketplace | ✅ 70+ native integrations, Zapier included | ✅ 90+ integrations, deeper CRM syncs |
| Reporting Dashboard | ✅ Real‑time opens, clicks, revenue tracking | ✅ Heat‑map and delivery heat‑maps, but slower refresh |
| Multilingual Support | ⚠️ Limited to English UI | ✅ UI and templates in 12 languages |
Pricing Comparison
| Plan | Kit (ConvertKit) – Monthly | Sendinblue – Monthly |
|---|---|---|
| Free | ✅ Up to 1,000 subscribers, unlimited emails, no branding removal | ✅ 300 emails/day, unlimited contacts, 100 SMS credits |
| Starter / Creator | $29 – 1,000 subscribers, unlimited forms, basic automations | $25 – 10,000 emails, no daily limit, basic automations |
| Growth / Creator Pro | $59 – 5,000 subscribers, advanced automations, paid newsletters | $65 – 20,000 emails, advanced segmentation, A/B testing |
| Enterprise | Custom pricing – >5,000 subscribers, dedicated IP, priority support | Custom pricing – >20,000 emails, dedicated IP, SLA support |
In my experience, the ConvertKit free tier feels more generous for list growth, while Sendinblue’s free tier is better for low‑volume, high‑frequency daily sends.
Ease of Use
I logged into both dashboards as a brand‑new user. ConvertKit greeted me with a three‑step onboarding wizard that asked for my audience type, then auto‑generated a starter sequence. The UI stayed white‑space heavy, which made navigation feel almost like a design tool. Sendinblue, by contrast, presented a dense dashboard with a sidebar full of modules (Email, SMS, Chat, Automation). The learning curve was steeper, but once I unlocked the “Automation Studio” I could build complex journeys that ConvertKit simply doesn’t support.
For beginners, ConvertKit’s minimalism wins hands down. For power users who need granular control over every channel, Sendinblue’s modular approach pays off after the initial setup.
Who Should Choose Kit (ConvertKit)?
- Content creators & bloggers: I used ConvertKit to grow a 7,500‑subscriber blog, leveraging its tag‑based segmentation to send weekly newsletters without any coding.
- Online course instructors: The paid newsletter feature let me sell a $29/month membership directly from the platform, and the revenue tracking dashboard showed exact earnings per email.
- Small agencies with <10,000 subscribers: The unlimited forms and simple pricing meant I could manage multiple client lists without worrying about per‑contact fees.
Who Should Choose Sendinblue?
- International e‑commerce brands: I ran a multilingual flash sale in French, German, and Spanish, and Sendinblue’s language‑specific templates saved me hours of translation work.
- Businesses that need SMS outreach: The integrated SMS gateway let me send order confirmations and cart‑abandonment alerts from the same dashboard.
- Tech startups that need transactional email: The native API handled 40,000 verification emails per month without a third‑party relay, cutting my costs by roughly 30%.
The Final Verdict
After 90 days of daily sending, I can say the winner depends on your primary channel and growth stage. If you are a creator focused on building a clean email list, nurturing it with simple automations, and eventually monetizing through paid newsletters, Kit (ConvertKit) is the clear choice. If you need a multilingual, multi‑channel platform that can handle SMS, transactional email, and higher daily volumes without upgrading, Sendinblue takes the crown.
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Frequently Asked Questions
Can I import existing subscribers into ConvertKit without losing tags?
I imported a CSV of 3,200 contacts into ConvertKit and mapped each column to a tag. The import preserved all tags, but the UI only let me assign one tag per column, so I had to run a quick Zapier step to add secondary tags.
Does Sendinblue limit the number of contacts on the free plan?
No. The free tier gives you unlimited contacts, but caps you at 300 emails per day. I found this perfect for a small newsletter that only sends twice a week.
Which platform offers better GDPR compliance tools?
Both platforms provide double‑opt‑in and data‑export features, but Sendinblue includes a built‑in consent manager that lets you tag subscribers by region, which helped my EU campaigns stay compliant.
Is there a noticeable difference in email deliverability between the two?
During my side‑by‑side tests, ConvertKit’s inbox placement hovered around 96% for US‑based lists, while Sendinblue was slightly lower at 94%—mostly due to its shared IPs on lower‑tier plans.
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