Interakt vs MSG91: Which is Better in 2026?

The short answer

If you’re reading this at midnight before renewing WhatsApp tooling for a Shopify-heavy D2C brand, pick Interakt and sleep. SMS OTP at crore-scale plus WhatsApp plus voice in one Indian CPaaS stack? MSG91. Same WhatsApp logo on both dashboards doesn’t mean same job description.

Where Interakt actually wins

Commerce wasn’t bolted on later here—it sits in the middle of the product like it belongs there, which matters when abandoned-cart pings are literally paying your FB ads bill. Shared inbox plus broadcasts plus drip flows sit close enough that ops doesn’t file six tickets just to ship one festival campaign.

• Shopify catalog sync and checkout-shaped journeys we didn’t have to duct-tape from Zapier rows (deep connector beats “we have an integration page”).
• Abandoned cart recovery sequences are opinionated defaults: plug SKUs, set delays, argue about copy—not rebuild state machines from scratch.
• Click-to-WA ad attribution hooks matter when Performance Max budgets disappear faster than chai at a founder meetup.

Counter-example: pure ticket-resolution shops routing refund gymnastics without catalog logic—Interakt works, but you’re paying Growth-tier vibes for WhatsApp inbox features competitors bundle cheaper.

Where MSG91 actually wins

OTP drops. SMS blast with DLT headers intact. WhatsApp API beside voice IVR beside email—all prepaid out of one wallet so finance stops asking why marketing bought another SaaS card machine.

• SMS at ₹0.15–₹0.30 bracket plus volume ladders beats subscribing your way into messaging when volumes spike Diwali week.
• Multichannel CPaaS means EdTech OTP + WA course nudge + flash SMS reroute share compliance paperwork instead of fragmenting vendors (GST invoices multiply otherwise).
• Developer-first APIs suit teams already running Razorpay webhooks who’ll chew glass before dragging marketers through another no-code maze.

Sometimes loses hard: launching WhatsApp storefront weekend flash sale without engineers—MSG91 won’t hand you catalog-checkout polish Interakt ships Saturday-ready.

Pricing, in INR, no spin

Interakt bills subscription-plus-use: Starter ₹2,499, Growth ₹5,499, Advanced ₹7,499 per month—all before Meta conversation charges hit (utility vs marketing vs service categories; marketing stings during sales). GST adds on invoices. Hidden costs: catalog scale may push tier jumps, WA ad connector work, conversation spike MDR-equivalent pain if you blast indiscriminately.

MSG91 is wallet prepaid: WhatsApp at Meta rates plus roughly ₹0.10 platform fee per message (stack on template + conversation rules you already curse), SMS ₹0.15–₹0.30 per SMS, volume discounts opaque until sales replies. GST on recharge. Hidden costs: wallet top-up friction for non-finance owners, developer time wiring webhooks, advanced modules sometimes sales-gated.

Math, one scenario: ₹50L GMV/month, average ticket ₹1,200 ⇒ ~417 paid orders. Assume 35% checkout drop; you cart-recover to 12% of dropped baskets with 3 WA touches each—ballpark 5,200 template messages/month (campaign + utility mix). Meta’s India conversation table (not quoted in rupees here—verify current Meta sheet) plus Interakt subscription floor ₹2,499 ⇒ plan + ~₹9,999+ in variable Meta spend if marketing-heavy vs lean utility routes. Same volume on MSG91: Meta pass-through + ₹0.10/msg platform line ≈ ₹520 in platform line before Meta’s own invoice—still need Meta wallet anyway—plus ₹2,499 isn’t applicable because MSG91 isn’t charging SaaS seats the same way; budget shifts to engineer months instead.

Rough yearly bleed illustration: ₹62L GMV run-rate shop accidentally classified half WhatsApp traffic as marketing conversations—Meta invoices swing harder than either vendor headline.

What we’d actually use each for

If you’re a 12-person D2C team on Shopify doing ₹40L MRR with two growth associates owning lifecycle and one frustrated engineer—we’d standardise Interakt: fewer bespoke WhatsApp commerce URLs floating in Slack threads.

Three-engineer SaaS shipping OTP plus transactional SMS plus WA onboarding drips with SOC2-ish procurement—we’d centralise MSG91 and accept uglier dashboards because uptime APIs beat aesthetic dashboards during payout week.

Regional logistics outfit needing voice IVR callbacks plus WA POD confirmations plus promo SMS—MSG91 wins unless parent HQ mandates Shopify-centric tooling.

Indian fit (GST, UPI, IST, support)

Both invoice INR-friendly flows—GST called out on subscription (Interakt) and wallet recharge (MSG91). UPI settles wallets fine on MSG91; Interakt subscriptions behave like domestic SaaS billing (card/UPI depending checkout gateway—not USD sticker shock [USD] absent here). Support windows Mon–Sat 10am–7pm IST on both—realistic for India ops, cruel if you’re debugging US midnight releases (not Silicon Valley PT hand-holding).

E-invoicing crossed thresholds for many mid-market firms—neither tool is your ERP; export accounting reports yourself. RBI card tokenisation noise matters for checkout elsewhere, not inside these inboxes directly—unless your WA checkout rides external gateways already token-compliant.

Migration: what’ll bite you

Interakt → MSG91: lose polished commerce journeys—rebuild catalog sync via APIs, cart webhooks differ, abandoned-cart state lives in Shopify apps you must remap. Broadcast audience segments don’t port 1:1—export CSVs, re-tag templates. Meta Business Manager phone number stays, but template libraries need resubmission if namespace tricks differ. Contract: Interakt annual might have notice windows; wallet balances on MSG91 are separate cashflow.

MSG91 → Interakt: prepay wallet stranded unless consumed—sunk versus seat model switch. SMS routes and DLT headers don’t transport; re-verify headers. Voice/IVR workloads need new vendor or keep MSG91 hybrid (now you run two vendors—sync pain). Zapier glue you wrote for CRM must be validated—field names differ.

What we’d pick

Default to Interakt when revenue story is Shopify cart recovery and WhatsApp store—accept higher seat floor. Default to MSG91 when message volume economics and OTP/SMS dominance beat pretty UI—we’ve seen teams prepone vendor evals post-NPCI UPI Lite experiments that still didn’t kill SMS OTP demand. Where would you rather burn margin: Meta conversation band or engineering calendar—still unresolved for us during last quarter’s budgeting fight.

Things people actually ask

bro is Interakt actually cheaper if I’m doing ₹2 cr/yr GMV or is Meta the real villain

Meta is usually the villain—subscription difference (₹2,499 vs wallets) fades next to mis-classified marketing conversations at scale. Model a month: count marketing vs utility templates, multiply by Meta’s stated per-conversation rupee-equivalent; compare to Interakt tier you need for team seats.

GST input on these invoices—same headache as Zoho?

Same headache, different vendor name. You get GST-compliant invoices from both; reconcile like any SaaS—neither replaces your CA for e-invoice sync to GSTN.

MSG91 ₹0.10/msg—does that include WhatsApp Media template costs?

That’s their platform line; Meta bills media and conversation categories separately—budget both lines, verify current MSG91 pricing page before you quote procurement.

Can I run click-to-WA ads via MSG91 like Interakt claims?

Technically yes with Business API plumbing; campaign UX and creative-to-journey shortcuts are leaner—you’ll script more in Meta versus Interakt’s guided surface.

Shopify refunds through WA—who breaks less?

Interakt paths expect commerce objects; MSG91 needs you to wire order webhooks yourself—fewer guardrails, more control, more midnight bugs.

Do I redo DLT headers if I switch SMS from Gupshup to MSG91?

Yes—header registration is per telemarketer/account; budget a week plus retest OTP deliverability before cutover.

Is Interakt “foreign” because Haptik/Jio backing?

Product and support skew India-first; you’re not stuck on PT Zooms for billing—IST hours still mean same-day gaps on Sunday incidents.

Will RBI’s recurring payment rules kill my WhatsApp subscription upsell?

They complicate card-on-file flows in your checkout, not Interakt’s SaaS invoice to you—separate anxiety.

Solopreneur—neither?

If volume is thin, Interakt seat may feel steep; MSG91 wallet can start tiny but demands patience for API docs. Pick your poison: cash or time.