Acoustic vs Klaviyo (2026): which should you pick?

Pick Acoustic if

• Fits if you are a large sender mixing email, SMS and push
• Makes sense if you want a managed service alongside the software

Look elsewhere if

• Not for you if you want a price before you talk to anyone
• Skip it if you want to try it free, as there's no plan or trial
• Too light for personalization on Essentials, as web personalization and behavioral analytics aren't in it
• Watch out: volumes are counted annually, with Essentials at 5 million contact records and 30 recurring campaigns a year
• Watch out: extra volume, SMS short codes and deliverability audits are add-ons

Pick Klaviyo if

• Fits if you run a Shopify shop and want emails driven by what people buy
• Works for brands that want email and texts in the same flows, with revenue shown per campaign

Look elsewhere if

• Pricey if your list grows fast, at $150 a month for 10,000 profiles, and the plan moves up by itself
• Skip it if you just want a newsletter, as that's a lot of store tool to pay for
• Tight if you stay free, since 500 sends a month is two emails to a 250-person list, and sending halts past it
• Watch out: texts cost extra per send, Composer AI past the allowance is $10 per 1,000 credits, and support packages start at $500
• Not for you if you want funnel and cohort reports without paying for the Personalization add-on

Acoustic

• No prices are published; both plans go through a conversation with the vendor.
• Volumes are measured annually; Essentials includes 5 million contact records a year and 30 recurring campaigns a year.
• Web personalization and behavioral analytics are not in Essentials.
• Extra volume, SMS short codes, deliverability audits and managed services are sold as add-ons.

Klaviyo

• The Free plan stops at 250 active profiles and 500 sends a month; sending halts until the next cycle or an upgrade.
• Price follows active profiles, and accounts move automatically to a higher plan as the list grows.
• Text and other mobile messages cost extra per send, priced by destination with carrier fees included.
• Composer usage beyond the plan allowance is billed at $10 per 1,000 credits; paid support packages start at $500 a month.

Acoustic

Multichannel messaging

Email, SMS, mobile push and WhatsApp, with scheduled, triggered and manual campaigns on both plans.

Behavioral tracking

Website and app tracking with standard and custom signals; the Advanced plan adds inferred signals and a no-code Signal Studio.

Acoustic AI

An assistant included in every plan that analyzes campaigns and audiences and drafts messages, campaigns or segments for review.

Analytics and personalization

Advanced adds session-level insights, executive dashboards and web personalization.

Session Replay add-on

A paid add-on for Advanced showing recorded customer sessions with rage-click and form-error signals.

Klaviyo

Unified customer profiles

Each shopper's browsing, order and engagement history sits in one profile, synced from more than 350 integrations and used for real-time segments.

Flows and campaigns

Email and flow templates, web sign-up forms and personalized product recommendations are on every plan, including Free.

Mobile messaging

SMS, MMS, WhatsApp, RCS and mobile push sit alongside email in the same flows, billed per message on top of the email plan.

Composer AI agent

Composer reviews flows, segments and forms and drafts campaigns from a prompt. Free accounts get $5 of usage a month; a $20 monthly add-on gives four times as much.

Reports and benchmarks

Dashboards, campaign revenue attribution and peer benchmarks on every plan. Funnels, cohort reports and custom attribution need the Personalization add-on.

Customer service tools

Customer Agent answers shopper questions with AI (first 50 resolutions free) and Helpdesk handles tickets, with a 30-day free trial.

Acoustic

Pricing could not be confirmed. See acoustic.com.

Klaviyo

• Free$0

  250 active profiles, 500 email sends a month, $5 of mobile messages a month. Emails carry the Klaviyo logo.

• Email$20

  per month for up to 500 active profiles, billed monthly

  5,000 sends a month, logo removed, generative AI and predictive analytics. Price rises with the list: $150 a month at 10,000 profiles.

• EnterpriseCustom

  Standard and Advanced packages priced by active profiles through sales, with sends bought separately by usage.

Acoustic

No public discounts listed.

Klaviyo

• Other savings

  $19 off the first month of the Email plan

  A one-time $19 credit on the first month of the $20 Email plan for accounts with no paid Klaviyo plan in the past 12 months. Valid through November 30, 2026.