ConvertKit (Kit) vs Brevo (formerly Sendinblue): Which is Better in 2026?

The short answer

If you’re building a creator business—newsletter, paid recommendations, sell templates on the side—Kit wins. It’s not close for that workflow.

Brevo wins when you’re an Indian SMB counting rupees per send, need transactional mail in the same account, and can live with a busier UI.

Pick one. Splitting the stack “for later” costs you two integrations and a GST headache.

Where ConvertKit (Kit) actually wins

Kit’s automation builder isn’t magic, but it respects how creators actually think: one person flows through tags, not seventeen duplicate lists named “Master_List_FINAL_v3”. That alone saved us from a ops incident we don’t talk about at family dinner.

Native paid newsletters, tip jars, and digital products mean you’re not duct-taping Gumroad + Mailchimp when someone pays in dollars (or rupees that hit Stripe first). The Sponsor Network and Creator Network are real upsides if you monetise recommendations, not just “blast 40% off Diwali sale”.

• You run a weekly letter, pitch sponsors in-flow, and sell a ₹4,999 Notion pack without leaving the tool.
• Sequences actually match a coach’s funnel: lead magnet → nurture → paid cohort, with branching on tags (did they buy, did they click pricing).
• You care more about deliverability lore and “will Gmail Promotions eat me alive?” than about pixel-perfect email art direction.
• Your finance team is already dealing with reverse charge on US SaaS and has a CA who loves complaining about it (Kit stays in that bucket).

Where it loses: big Shopify catalogues with cart abandonment matrices, RFM scoring, and “send if browsed category X in last 72 hours.” That’s not Kit’s religion. Klaviyo people will laugh at you (politely) in the lift.

Where Brevo (formerly Sendinblue) actually wins

Paris-built, priced like it knows India’s SMBs exist. Unlimited contacts on a send-based model is the cheat code when your list is fat but your lungs only send twice a week.

The transaction API is boring-good—exactly what you want when OTPs, invoices, and “payment received” mails must not vanish. SMS and WhatsApp in the same vendor account matter the moment Meta squeezes you or when Diwali push needs both channels (DND rules still apply; I’m not your lawyer).

• D2C brand with 2 lakh sign-ups, 6 lakh emails/month actual sends: you’re playing volume math Kit would invoice you into orbit for.
• Small SaaS with onboarding drips + password resets: one SMTP credential, fewer midnight pager stories.
• You want a crude CRM, deal pipeline, and meetings without buying HubSpot seats (manage your expectations—the polish isn’t Cupertino).
• GST invoices from an India-facing entity: your CA stops sending passive-aggressive voice notes about place of supply.

Counter-example that hurts: creator-with-a-personal-brand. You’ll fight the UI for “arty minimal newsletter” vibes, and the automation UX is fine, not devotional.

Pricing, in INR, no spin

Everything I quote below is [USD] on-card unless Brevo bills you through an India arrangement that moved since I last checked—verify at checkout. Spot rate used: $1 ≈ ₹83 (rough; your card will murder you slightly differently).

Kit [USD]: Free up to 10,000 subscribers but automations are off—that’s like giving you a stove with no gas connection. Paid “Creator” often lands around $25/mo for the first 1,000 subscribers in the pricing ladder I’ve seen; “Creator Pro” about $50 at that same band. It grows with headcount (subscribers), not whether those people ever open a mail.

Brevo [USD]: Free tier: 300 emails/day (roughly 9,000/month if you max daily—reality is patchier). Starter from about $9/mo for a 5,000-email/month type allocation in their ladder; Business tier steps up. The point is: contacts don’t multiply the bill; sends and daily caps do.

Back-of-envelope, Indian scenario: Say you’re a beauty D2C doing about ₹50,00,000 GMV a month with average order value ₹1,200. That’s ~4,166 orders a month—let’s pretend your engaged list is 35,000 and you run two full-list campaigns weekly plus three journey touches for new buyers. Ballpark 35,000 × (8 broad + maybe 3 extra for segments) ≈ 3,85,000 sends/month. Brevo forces you into a paid tier that covers that volume; Kit might still price you chiefly on 35k subs regardless of whether half are ghosts.

Hidden rupee leaks:

• Forex markup + GST: foreign [USD] invoices often mean 18% IGST reverse charge service pain in the books, plus ~3–4% bank spread on the card (sometimes hidden in “dynamic conversion”).
• Add-ons: SMS, WhatsApp, dedicated IP, or extra seats on Brevo Business; Kit’s paid tiers if you need Creator Pro features.
• People cost: if Kit’s US-hours support means your growth person stays up till 1am IST, that’s not free.
• Compliance templates: e-invoicing thresholds and GST line items won’t magically appear—you still wire Razorpay/Shopify data correctly (Brevo via Zapier to Razorpay is a thing; it’s not zero work).

Neither heroically solves UPI inside the product UI last I looked; you’re still routing money through gateways.

What we’d actually use each for

If you’re a 12-person D2C team on Shopify with ₹40,00,000 MRR, lifecycle email is ops, not poetry. Brevo for promos + transactional, with careful watch on daily caps. Kit only if your brand is founder-fronted newsletter commerce and your catalog is narrow.

If you’re a solo operator teaching SQL to working professionals, ₹1,999 cohorts, Kit. Tag people who watched the webinar replay, pitch the cohort, sell a template. Reverse charge is annoying but predictable; your stack stays legible.

If you’re a B2B SaaS with ₹2 crore ARR and a messy product-led funnel, neither is perfect—Brevo’s CRM is a stunt double, Kit is the wrong movie—but Brevo’s SMTP + cheap broadcasts keep burn low until you buy a proper MAP.

Indian fit (GST, UPI, IST, support)

Brevo advertises GST handling via an India entity; that matters for ITC chatter with your CA. Kit is the classic “foreign SaaS, pay in dollars, figure reverse charge” story (not unique; Stripe did this to us for years).

INR-native invoicing from the apps themselves? Unromantic no on both in the JSON I’m holding. UPI as a native pay method inside the email builder? Also no—tokenisation drama (RBI rules) lives with your payment gateway, not these inboxes.

Support hours: Kit skews US business hours; weekends thin. Brevo overlaps IST a bit more in practice for chat/email—still not a neighbourhood chai-shop SLA. If your Diwali campaign blows up at Saturday 9pm, you’re on Slack with your own dev, not a hero in Boise.

Migration: what’ll bite you

Kit → Brevo: Tags don’t port as tags; you rebuild segments with list attributes or filters. Automations: redraw every branch; webhook endpoints change; Shopify deep links may need reinstalling. Landing pages and forms hosted on Kit need DNS and embed swaps. Creator income flows (Kit’s native commerce) don’t magically become Brevo—payment links or store integration first.

Brevo → Kit: You lose native SMS/WhatsApp orchestration in one pane (budget for Twilio/MessageBird plumbing). Transactional streams often get split—marketing in Kit, transmail elsewhere—so engineers mutter about dual warm-up and DKIM alignment. CRM pipeline data exports cleanly? Sometimes. Usually it’s CSV archaeology. Paid recommendation revenue shifts to Kit’s rails; expect a week of broken thank-you pages if you rush.

Contract-wise, annual prepay on either side is the usual “we’ll finish the migration next quarter” trap.

What we’d pick

We’d run Kit for creator-led revenue where email is the product surface. We’d run Brevo when rupee discipline and send economics beat brand minimalism.

If you’re still reading at 11pm because your growth lead and your CFO arm-wrestled in the group chat, ask yourself whether you’re optimising for subscribers or for sends. That single question decides more than any feature matrix.

Things people actually ask

“Bro is Brevo actually cheaper if I blast ₹2 cr/yr revenue worth of promos?”
Depends on sends, not GMV. ₹2 cr turnover with a 50,000-person list and daily mail will eat tiers; same list with two mails a week is cheap. Model emails/month, not revenue vanity.

“Do I need to redo my GST invoice template if we switch?”
Your invoices come from billing/Razorpay/ERP, not the ESP. You do need to fix merge tags and maybe transactional triggers so number series stays legal post-e-invoicing threshold changes.

“Kit free 10k subs—can we run our welcome series?”
No automations on free in their positioning; you’re manually babysitting or you pay. That’s the trap.

“Will UPI Lite users get mails slower?”
No correlation; deliverability is inbox provider + domain rep. UPI Lite is user wallet rails, not SMTP physics.

“Brevo deliverability shit vs Kit?”
Both can inbox well if you behave. Brevo isn’t cult-tier lore; Kit isn’t magic if you buy lists like a villain.

“Razorpay webhook to Brevo via Zapier—production ready?”
Fine for light triggers; add retries idempotency on your side. For money-moving events, I still prefer a tiny worker you control.

“Can we bill Kit in INR?”
Generally [USD] on-card; your bank converts and judges your life choices.

“IST-friendly phone support?”
Assume async email/chat; plan campaigns outside vendor siestas.

“If RBI tokenisation broke our saved cards, we switching ESP?”
Wrong layer. Fix card vault at gateway; don’t migrate eighteen flows because Kit vs Brevo theology changed.