Unecast vs Sendwo vs Sleekflow – Which WhatsApp Broadcast Software Has The Best Broadcast Pricing (Platform Fee + Meta Fees, 1 Oct 2026 Change)?

• In our view, SleekFlow has the best broadcast pricing for teams that market, sell and support on WhatsApp, because non-replying recipients aren’t counted.
• Sendwo suits low-cost starter broadcasts, with the lowest paid plan at US$23 per month on annual billing and a free plan for one user.
• Unecast suits teams that also send SMS from a separate account, from US$24 per month on annual billing, with no markup on Meta’s fees.
• Meta’s per-message fees come on top of every plan, and Meta does not deliver marketing templates to US phone numbers.
• Since 1 October 2026, Meta also charges for service replies after the first 1,000 per phone number each month.

We rate SleekFlow’s broadcast pricing best for teams that use WhatsApp for marketing, sales and support, because the bill follows the customers who engage, not the size of the list. Sendwo has the lowest paid plan at US$23 per month, and Unecast adds SMS from US$24. Meta’s per-message fees come on top of all three.

Broadcast pricing now has two parts: the platform fee and Meta’s message fee. Meta changed the second part on 1 October 2026.

What Changed In Whatsapp Pricing On 1 October 2026

Meta now charges for any non-template message sent through the WhatsApp Business Platform. Its pricing documentation states that service messages and utility replies inside the 24-hour window became chargeable on 1 October 2026.

Marketing templates were already charged, though Meta raised marketing rates in some markets on the same date, including Saudi Arabia, the UAE and Mexico. The bigger change reaches the shared inbox. Each business phone number keeps 1,000 free service messages per month. Meta also required a payment method on file by 30 September 2026. Every sender therefore needs a funded card or credit line before the first reply goes out.

Utility messages sent inside an open 24-hour window now bill at the same utility rate as outside it. Authentication and utility rates sit far below marketing rates, so the inbox cost grows slowly. Large support teams still feel it, because every agent reply counts toward the monthly total.

How We Compared A 10,000-Recipient Broadcast

The scenario is one month with three agents, 10,000 marketing template messages to recipients outside the US and 500 customers who reply. Those replies generate 1,500 service messages, and the first 1,000 are free.

Meta’s per-message fee depends on each recipient’s market and the message category, and Meta can update rates at the start of each quarter, so check its current rate card for your countries. Meta does not deliver marketing templates to US phone numbers at all. The table compares what each platform charges for around those fees.

Platform fees are USD list prices on annual billing. Plans and pricing vary by country; see SleekFlow pricing for your country. Prices and plans checked October 2026.

The platform fee is the wrong number to compare. All three plans cover a 10,000-recipient list, but only SleekFlow leaves out the people who never reply: if 500 of them reply, Pro’s 500 included active contacts cover the month. Sendwo Starter and Unecast Growth set contact caps of 20,000 and 100,000 instead.

Seats follow the same pattern. A team that grows from three agents to eight stays inside Pro’s 10 seats, while Unecast adds US$10 per seat after three on Growth and Sendwo Starter includes three users. Meta’s message fees come on top everywhere: Unecast and Sendwo state that they add no markup, and SleekFlow bills messages from a prepaid balance at its published rates.

The Three Whatsapp Broadcast Software Platforms Compared

1. SleekFlow – Best broadcast pricing for marketing, sales and support

SleekFlow runs WhatsApp broadcast campaigns, sales conversations and customer support from a shared multi-user inbox on one number. The Pro plan costs US$109 per month on annual billing and includes broadcasts, AI agents and 10 seats. Plans and pricing vary by country. A free 7-day Pro trial needs no credit card.

SleekFlow prices by monthly active contacts, and one-way broadcast recipients who never reply or react do not count toward the 500 included on Pro. A contact counts when they message you, or when you message them from the inbox, Flow Builder, an AI agent or the API. Pro covers up to 30,000 broadcast messages a month, and campaigns can carry carousel templates and CTA buttons.

SleekFlow won the G2 Best Software Award 2024 in Customer Service Products and holds the HKPC Digital DIY Tech Partner designation from 2023. It is an official WhatsApp Business Solution Provider and Meta Business Partner, with ISO/IEC 27001 and ISO/IEC 42001 certifications and a SOC 2 Type II attestation, per its Trust Center.

SleekFlow is rated 4.6 out of 5 from 205 reviews on G2 and 4.5 out of 5 from 55 reviews on Trustpilot. A Malaysian automotive customer described the advice side in a Trustpilot review:

“good customer service to answer to all my needs and experienced to advise what is needed…” Quill Automobiles BMW, 5 stars on Trustpilot

What Stands Out

• Broadcast campaigns, shared inbox and AI agents on one Pro plan
• Contacts who only receive a broadcast stay outside the active contact count
• Shopify order history in the inbox on Pro, with HubSpot (Premium, limited access) and Salesforce (Enterprise) contact sync

Points to Consider

• Broadcast campaigns start on Pro, while Essential at US$49 (billed yearly) covers the inbox. Plans and pricing vary by country.
• Number hosting adds US$15 per month per WhatsApp number, and message fees come from a prepaid balance at SleekFlow’s published rates

Who It Suits: teams that market, sell and support customers on WhatsApp and want broadcasts, a shared inbox and AI agents in one place.

2. Unecast – Best for WhatsApp plus SMS campaigns

Unecast, built by Bloomwire (Private) Limited in Sri Lanka, combines the WhatsApp Business API with bulk SMS, AI agents and a cloud call center. Its SMS service runs from a separate account and covers Sri Lanka by default. It operates as a Meta Tech Provider. Meta bills message fees to your card at its published rates, with no Unecast markup.

Starter costs US$24 per month on annual billing (US$29 billed monthly) with one seat and 10,000 contacts. Growth costs US$41 with three seats and 100,000 contacts, and Scale costs US$82 with eight seats. Extra seats cost US$10 per month.

What Stands Out

• WhatsApp, bulk SMS and AI agents on one platform
• Team inbox with chat ownership and a drag-and-drop sales pipeline
• Meta fees billed at cost, with AI replies at US$0.002 to US$0.015 each from a prepaid balance

Points to Consider

• Public review ratings are not yet available
• Starter includes one seat, so a three-agent inbox costs less on Growth than on Starter plus two seats

Who It Suits: SMEs that run WhatsApp and SMS campaigns with one vendor.

3. Sendwo – Best for low-cost starter broadcasts

Sendwo is a WhatsApp marketing tool with bulk broadcasts, a team inbox, AI chatbots and drip campaigns. It adds 0% markup to Meta’s fees and describes itself as “Meta’s official business solution partner”. G2 rates it 5.0 out of 5 from 2 reviews.

Starter costs US$23 per month on annual billing, with three users, 20,000 contacts and 100,000 message credits. Pro costs US$47 with five users, 40,000 contacts and 500,000 credits, and Enterprise costs US$67. A free plan covers one user, 1,000 contacts and 500 message credits, and monthly billing is also offered.

What Stands Out

• Lowest paid plan of the three, with three users on Starter
• Scheduled broadcasts with rich media and interactive templates
• Starter includes 5 catalogs and 5 WhatsApp Flows

Points to Consider

• Listed prices are for annual billing, and monthly prices are not shown
• Agent assignment is not listed by plan on the pricing page

Who It Suits: small teams that want the cheapest way to start WhatsApp broadcasts.

Where The Bill Grows

Three items push a broadcast bill beyond the headline subscription. Each deserves a line in your budget.

• Seats: SleekFlow Pro includes 10 seats before extra seats at US$25 each, Unecast adds US$10 per seat after three on Growth, and Sendwo Starter includes three users. Plans and pricing vary by country.
• Contacts: SleekFlow counts only contacts who engage and adds them 100 at a time past the plan’s allowance, while Unecast and Sendwo set contact caps by plan (10,000 on Unecast Starter and 20,000 on Sendwo Starter).
• Frequency: a study of small businesses presented at IEEE’s SNAMS 2023 conference (published January 2024) flagged customer fatigue as a risk of heavy WhatsApp marketing.

Questions To Ask Before You Pay

Four questions separate a clear quote from a surprise invoice. Ask each provider in writing and keep the answers with your contract.

• Markup: does the platform add a percentage to Meta’s per-message rates, and is that stated in the contract?
• Billing: is Meta’s fee charged to your card directly, or invoiced by the platform with the subscription?
• Plan gating: which tier unlocks broadcasts, and how many seats and contacts does it include?
• Number fees: does the quote include number hosting, and what happens when active contacts pass the plan limit?

Which Platform Fits Your Broadcasts

Your Broadcast Pricing Questions Answered

• What do you pay for when you send broadcasts on SleekFlow?

You pay the plan fee, starting with Pro at US$109 per month on annual billing for broadcast campaigns, plus US$15 per month for each WhatsApp number and Meta’s message fees from a prepaid balance. Contacts count toward the plan only when they engage, so recipients who never reply or react don’t add to it. Plans and pricing vary by country.

• Can you send WhatsApp marketing broadcasts to US phone numbers?

No. Meta’s documentation says WhatsApp does not currently deliver marketing template messages to users with US phone numbers, and it gives no date for that to change. Sending one returns an error instead of a delivered message.

• Does a WhatsApp broadcast cost the same in every country?

No. Meta charges each delivered message by its category and the recipient’s country calling code, and it can update rates on the first day of each quarter. A broadcast to several countries is billed at each country’s rate, and businesses billed in India must move to INR billing by 31 Dec 2026.

• What changed in WhatsApp pricing on 1 October 2026? 

Meta began charging for non-template service messages and for utility replies inside the 24-hour window on 1 October 2026. Each business phone number keeps 1,000 free service messages per month.

• Are broadcasts free for customers who come from a Click-to-WhatsApp ad?

Within limits. When a customer messages you from a Click-to-WhatsApp ad on Android or iOS and you reply within 24 hours, a free entry point window opens for up to 7 days. Meta doesn’t charge for marketing, utility, authentication or service messages sent inside that window.

Choosing the Right Provider

In our view, SleekFlow has the best broadcast pricing for teams that market, sell and support customers on WhatsApp. Sendwo offers the lowest paid plan for starter broadcasts, and Unecast suits teams that pair WhatsApp with SMS.

Meta’s message fees grow with every message you send, so price your own volume before you compare plans. Run one trial month with a real broadcast and a real inbox, and check Meta’s current rate card for your recipient countries.

Teams that handle more replies than broadcasts should weigh the seat count and inbox tools above the subscription price. SleekFlow’s Pro plan includes 10 seats, while Unecast Growth and Sendwo Starter include three.

Teams that mostly send one-way campaigns can start on Sendwo or Unecast and move up when the inbox grows.