SimplyBoost vs SleekFlow

SleekFlow brings WhatsApp, Instagram, Facebook Messenger and live chat into one inbox, with broadcasts, a flow builder, a catalogue with payment links and AI agents on the higher plans. It is an official WhatsApp Business Solution Provider and strong for teams that send campaigns. SimplyBoost starts from the other end: the AI agent answers first, from your own content, rates the lead and hands over to your team when a person is needed. If answering customers matters more to you than bulk messaging, and you want a price that does not move with your contact count, SimplyBoost is the simpler choice. Looking for Sleak, the Dutch chatbot at sleak.chat? That comparison is on the [Sleak alternative page](/alternatives/sleak).

Short answer

For most businesses that want WhatsApp and Instagram messages answered well, SimplyBoost is the better SleekFlow alternative: one AI agent answers on WhatsApp, your website and Instagram for a flat €39, €89 or €169 a month, with no limit on contacts and no per-seat fee. SleekFlow is a WhatsApp-first inbox and marketing platform from Hong Kong, priced by monthly active contacts and seats, and its AI agents start on the Pro plan at US$109 a month on yearly billing.

Our verdict

SimplyBoost is the better pick for most teams

Choose SimplyBoost if you want AI to answer WhatsApp, website and Instagram messages at a fixed monthly price. AI replies, lead ratings, calendar booking and handover are in every plan, and you can compare the plans in a minute.

To be fair

When SleekFlow fits

SleekFlow still suits marketing teams that send WhatsApp broadcasts to large opted-in lists and sell through catalogue and payment links in the chat.

Why teams switch from SleekFlow to SimplyBoost

  1. 1The price does not move with your audience. SleekFlow counts monthly active contacts and charges for more; SimplyBoost prices by AI replies, so a growing contact list costs nothing extra.
  2. 2The AI agent is in the first plan. On SleekFlow it starts on Pro at US$109 a month on yearly billing; SimplyBoost includes 3 agents and 500 AI replies at €39.
  3. 3It answers from your own content and lists the questions it could not answer, so you add each missing answer once.
  4. 4Handover goes where your team already works: Slack, email, the dashboard, or a ticket in Zendesk, Freshdesk or Gorgias with the whole conversation attached.

Comparison checklist

AI replies on every plan from €39 a month, where SleekFlow's AI agents start on Pro at US$109 a month on yearly billing
No contact limit, where SleekFlow plans start with 500 monthly active contacts and charge for more
No per-seat fee: the owner and 2 teammates are included, where SleekFlow Essential includes 3 seats and Pro 10
Website chat, WhatsApp and Instagram answered by one agent in the customer's language
Handover to Slack, email, Zendesk, Freshdesk or Gorgias with the conversation attached
Hosted in Europe with a data processing agreement, and plans priced in euros

Shopify Integration and Product Suggestion Analysis

SleekFlow sells through chat with a product catalogue, payment links and a Shopify integration from the Pro plan, which suits brands that run WhatsApp campaigns. SimplyBoost's Shopify store assistant, included from Growth at €89 a month, recommends products from your synced catalogue, builds a cart with a checkout link and answers order questions on your website, WhatsApp and Instagram.

Where SimplyBoost usually leads

  • Product recommendations from your catalogue, ending in a checkout link.
  • Order status, returns and exchanges answered in the chat after an email code check.
  • The same product answers on your website, WhatsApp and Instagram.

Where SleekFlow still has strengths

  • Catalogue and payment links inside WhatsApp conversations.
  • Broadcast campaigns and abandoned-cart flows to opted-in contacts.
  • Shopify, Google Sheets and Zapier integrations from the Pro plan.

Smart checklist before you decide

  • Do you mainly need answers, or mainly campaigns?
  • How many monthly active contacts will you have in six months, and what does that cost?
  • Which plan includes the AI agent, and what does it answer from?
  • Where does a conversation go when the AI cannot help?

Based on public product information checked on 27 October 2026.

Who should choose which

Choose SimplyBoost for

  • Businesses that want WhatsApp and Instagram questions answered automatically
  • Teams that want one price regardless of contact count
  • Shops that want product and order answers on every channel

Choose SleekFlow for

  • Broadcast campaigns, click-to-WhatsApp ads tooling and a flow builder
  • Official WhatsApp Business Solution Provider with a catalogue and payment links
  • Ticketing, role-based access and multiple workspaces on the higher plans

How to switch from SleekFlow

Most teams do this in an afternoon and keep SleekFlow running until the answers look right.

  1. Step 1

    Add your knowledge

    Add your website, FAQ pages and documents such as your returns policy. The knowledge base guide shows every source type.

  2. Step 2

    Put the agent on your website

    Install the widget with one snippet, the WordPress plugin, the Shopify app embed or Google Tag Manager. SleekFlow can keep running next to it while you test.

  3. Step 3

    Choose where handovers go

    Pick email, the dashboard, Slack or your helpdesk, and decide which topics always go to a person. See the handover guide.

  4. Step 4

    Move WhatsApp and Instagram

    Connect your WhatsApp Business number through Meta's embedded signup and your Instagram account through Facebook login. A number is connected to one platform at a time, so plan that moment. The WhatsApp guide explains the steps.

Plans, limits and yearly prices are on the pricing page. When you're ready, start a 7-day free trial with 100 AI replies.

Common Questions

Is SimplyBoost a good SleekFlow alternative?

For businesses that want messages answered rather than campaigns sent, yes. SimplyBoost includes the AI agent, WhatsApp, Instagram, website chat and handover in a flat €39, €89 or €169 a month, with no contact limit. SleekFlow suits teams whose main job is WhatsApp marketing at volume.

What does SleekFlow cost?

On yearly billing SleekFlow Essential costs US$49 a month with 500 monthly active contacts and 3 seats, Pro US$109 with AI agents and 10 seats, and Premium US$279 with 1,000 contacts. Monthly billing is higher, and prices vary by country (sleekflow.io/pricing, checked 27 October 2026).

Does SleekFlow include an AI agent?

Essential includes an AI co-pilot for the inbox. AI agents that answer customers start on Pro. SimplyBoost includes 3 AI agents and 500 AI replies on its first plan at €39 a month.

Can I keep my WhatsApp number when I switch from SleekFlow?

Yes. You connect your WhatsApp Business number to SimplyBoost through Meta's embedded signup. A number is connected to one platform at a time, so plan the moment you move it. The [WhatsApp guide](/docs/whatsapp) explains the steps.

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