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Head-to-head · SMS Marketing Software

Sinch Engage vs Klaviyo

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Sinch Engage #1 in SMS Marketing Software 9.4/10 14-day trial Free trial✓ 5 of 5 features Visit Sinch Engage
Klaviyo #2 in SMS Marketing Software 9.2/10 Free plan Free plan✓ 0 of 5 features Visit Klaviyo

Sinch Engage leads on 0 checks, Klaviyo on 1, and 5 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreSinch Engage · 9.4/10
  • Free planonly Klaviyo
  • Free trialonly Sinch Engage
  • Most featuresSinch Engage · 5 of 5

Sinch Engage scores higher on our rubric for sms marketing software: 9.4 against 9.2 out of 10; our editors rank them #1 and #2.

Klaviyo offers free plan; Sinch Engage doesn't.

Sinch Engage is the better fit for larger teams needing multichannel messaging and AI. Klaviyo is the better fit for ecommerce teams combining SMS with advanced email data.

  • Sinch Engage fits best

    Larger teams needing multichannel messaging and AI

  • Klaviyo fits best

    Ecommerce teams combining SMS with advanced email data

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Sinch Engage 9.4/10 Visit ↗ Klaviyo 9.2/10 Visit ↗
At a glance
Editor score 9.4 9.2
Ranking #1 in SMS Marketing Software #2 in SMS Marketing Software
Best for Larger teams needing multichannel messaging and AI Ecommerce teams combining SMS with advanced email data
Pricing model Paid Free plan + paid
Starting price — —
Free plan — ✓ (best)
Free trial 14 days —
Deployment Cloud, Mobile Cloud
Platforms Web, iOS, Android Web
Support Live chat, Email, Phone, Tickets · 24/7 Email, Live chat, Community, Docs · 24/7
Compliance GDPR, ISO 27001, SSO/SAML ISO 27001, PCI DSS
Integrations 15 integrations 350+ integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Sinch Engage 5/5 · Klaviyo 0/5
Workflow automation ✓ (best) Not checked yet
Audience segmentation ✓ (best) Not checked yet
MMS support ✓ (best) Not checked yet
Inbound messaging ✓ (best) Not checked yet
Compliance tools ✓ (best) Not checked yet
Specs
Subscriber limit Not checked yet Not checked yet
Message limit 3000 messages/mo Not checked yet
Our review
Pros
  • Supports SMS, MMS, RCS and WhatsApp campaigns
  • Combines automation, two-way messaging and shared inboxes
  • Offers REST APIs, webhooks, analytics and AI campaign tools
  • Automated email, SMS, and push flows with real-time segmentation
  • 350+ integrations plus flexible APIs for ecommerce and business systems
  • Free plan includes reporting and supports up to 250 active profiles
Cons
  • No free plan; monthly pricing starts at $99
  • Higher plans list a maximum of 3 users
  • Advanced messaging features are reserved for paid tiers
  • The free plan is limited to 500 email sends per month
  • Paid plan pricing scales with profiles, volume, and channel usage
  • Its published strengths center more on email than SMS depth
Our verdict

Sinch Engage is a business messaging platform for organizations managing customer communications across SMS, MMS, RCS and WhatsApp. Teams can create scheduled and recurring messages, automate reminders and follow-ups, manage contacts,…

Read the review →

Klaviyo is an AI-first B2C CRM for consumer brands that combines email marketing, SMS, push messaging, automation, customer data, analytics, and segmentation. It is aimed at ecommerce teams and other businesses that need behavior-based…

Read the review →
  1. Sinch EngageSMS Marketing Software 9.414-day trial
  2. KlaviyoSMS Marketing Software 9.2Free plan

Strengths and trade-offs

  • Sinch Engage — where it wins

    • Supports SMS, MMS, RCS and WhatsApp campaigns
    • Combines automation, two-way messaging and shared inboxes
    • Offers REST APIs, webhooks, analytics and AI campaign tools

    Where it doesn't

    • No free plan; monthly pricing starts at $99
    • Higher plans list a maximum of 3 users
    • Advanced messaging features are reserved for paid tiers

  • Klaviyo — where it wins

    • Automated email, SMS, and push flows with real-time segmentation
    • 350+ integrations plus flexible APIs for ecommerce and business systems
    • Free plan includes reporting and supports up to 250 active profiles

    Where it doesn't

    • The free plan is limited to 500 email sends per month
    • Paid plan pricing scales with profiles, volume, and channel usage
    • Its published strengths center more on email than SMS depth

More comparisons

All SMS marketing software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update