Cellcast vs MessageMedia (now Sinch Engage) (2026): which should you pick?

Pick Cellcast if

• Fits if you're an Australian business that wants texts with an inbox and review requests
• Works for a shop that sends rarely and wants credits that never expire

Look elsewhere if

• Pricey if you want the AI agents, which start at A$587 a month
• Watch out: prices are in Australian dollars and leave out GST
• Not for you if you need a dedicated number included, since that is a paid add-on
• Tight if you want a free trial, as only the empty pay-as-you-go account is free

Pick MessageMedia (now Sinch Engage) if

• Fits if a business sends SMS campaigns to its customers
• Works for shops on Shopify or a CRM such as HubSpot

Look elsewhere if

• Pricey if you send volume: $249 a month at 10,000 texts and $799 at 40,000
• Skip it if you want a free plan, as only a 14-day trial is offered
• Tight if you need a shared inbox or roles, which start at $249
• Watch out: only monthly prices are shown, with annual savings of 16% not priced
• Watch out: it is being rebranded to Sinch Engage, and the old address redirects

Cellcast

• All prices are in Australian dollars and exclude GST.
• Credits above the monthly allowance on Infinity plans are billed by usage.
• A dedicated number is a paid add-on, and call recording and IVR are limited to higher plans.
• MMS bundles are listed at A$0.28 to A$0.34 a message, with a lower sale price shown beside each.

MessageMedia (now Sinch Engage)

• Every plan is a monthly SMS allowance with a fixed price, so the cost climbs steeply with volume: $249 a month at 10,000 messages and $799 at 40,000.
• The pricing page shows only monthly prices; it offers a 16% saving for annual payment but does not display the yearly figures.
• The inbox, role-based access and mobile app start at the $249 Conversations plan, and the Basics plan has a single user.
• MessageMedia is being rebranded to Sinch Engage, and the old messagemedia.com address now redirects to sinch.com/engage.

Cellcast

Bulk SMS and MMS

Send single or bulk messages from shared numbers, a business name or a dedicated number.

Two-way inbox

Replies are free and land in one inbox; Infinity plans add live chat and AI-drafted replies.

Review requests

Review templates, flows and automatic triggers are listed on every Infinity plan, with Google Business Profile on Pro.

API, email to SMS and 2FA

Send from your own software, by email, or as one-time codes.

AI agents on Advanced

Lead, sales, booking, support and reputation agents sit on the top Infinity plan.

MessageMedia (now Sinch Engage)

SMS, MMS and RCS campaigns

Send promotions and notices to a contact list, with images, GIFs and video on MMS and RCS. RCS needs the Pro plan or above.

Two-way inbox

Replies land in a shared inbox where conversations can be assigned to teammates and answered from templates. The inbox starts at the Conversations plan.

Automations and reminders

Schedule reminders and drip messages such as welcome and abandoned-cart texts. Basics includes 3 automation workflows.

WhatsApp channel

The product page lists WhatsApp campaigns alongside SMS, and HubSpot users can message over WhatsApp from there.

CRM and store integrations

Native connections to HubSpot, Salesforce, NetSuite, Shopify and Zoho, plus 19 listed integrations in all.

Subaccounts and access control

Pro and above add subaccounts so departments can work in separate spaces, with role-based permissions.

Cellcast

• Pay as you goA$0

  per month, credits bought as needed

  SMS from A$0.028 on a 100K bundle, A$0.047 for 10 credits. Credits never expire; replies are free.

• Infinity EssentialA$87

  per month, with 500 SMS credits

  Adds live chat, AI replies and contact summaries, multi-location and up to 10 digital business cards.

• Infinity ProA$159

  per month, with 2,000 SMS credits

  Adds email marketing and a Google Business Profile connection; up to 20 business cards.

• Infinity AdvancedA$587

  per month, with 4,000 SMS credits

  Adds AI lead, sales, booking, support and reputation agents, smart campaigns and lead routing.

MessageMedia (now Sinch Engage)

• Basics$99

  per month for 3,000 SMS and 1 user, billed monthly

  Campaigns, scheduled sends and two-way messaging with 3 automation workflows. The price rises with the monthly SMS allowance.

• Conversations$249

  per month for 10,000 SMS and 2 users, billed monthly

  Adds shared contacts and inbox, role-based access and a mobile app.

• Pro$799

  per month for 40,000 SMS and 3 users, billed monthly

  Adds RCS messaging, single sign-on and 1 subaccount.

• Pro Plus$1,799

  per month for 100,000 SMS, billed monthly

  Adds customer success onboarding and 2 subaccounts.

• Advanced$2,399

  per month for 150,000 SMS, billed monthly

  3 subaccounts and the lowest per-message rates of the five plans. Above 150,000 messages a month, pricing is custom.

Cellcast

No public discounts listed.

MessageMedia (now Sinch Engage)

• Annual discount

  Save 16% with annual payment

  The pricing page offers an annual payment option labeled as saving 16% against monthly billing.