SleekFlow is a capable multi-channel conversational AI platform. Flowella is a HubSpot-native WhatsApp app. The right choice depends on whether you want your WhatsApp work to live inside HubSpot, or inside a separate inbox.
"HubSpot Forms turned into WhatsApp Flows — submissions return as native form submissions."
"AI Suite for Revenue-Driving Conversations."
| CapabilityFor HubSpot users | HubSpot-native Flowella | Conversational AI inbox SleekFlow |
|---|---|---|
| HubSpot Form to WhatsApp Flow conversionOne-click conversion of an existing HubSpot form into a structured in-chat form. |
✓
One-click conversion of a HubSpot Form into a Meta WhatsApp Flow. |
✕
Not native. Customers build flows manually in SleekFlow's Flow Builder, or use Meta-native WhatsApp Flows (Enterprise plan only).5 |
| WhatsApp submissions as native HubSpot form submissionsFires the HubSpot workflows and reporting that already listen for that form. |
✓
Yes. Returns through HubSpot's standard form-submission pipeline. |
✕
No. Submissions live in SleekFlow as flow variables; HubSpot is updated via SleekFlow's Create HubSpot record / Update HubSpot record Flow Builder action nodes, not as native form submissions.4 |
| HubSpot workflow actionWhat action does your team drop into a HubSpot workflow? |
✓
Send WhatsApp via Flowella is a first-class HubSpot workflow action. |
✕
No HubSpot-native workflow action observed on the Marketplace listing. SleekFlow's Send Message action lives inside its own Flow Builder, triggered by a HubSpot record updated node inside SleekFlow.4 |
| Branching on structured WhatsApp repliese.g. NPS score, dropdown choice, yes/no or qualification answer. |
✓
Yes, via HubSpot workflow branches reading the returned form-submission values. |
✓
Yes, via SleekFlow Flow Builder's Save reply and Button as branch toggles on Messaging action nodes. The branching happens inside SleekFlow, not HubSpot. |
| Single workflow engineWhether HubSpot remains the only automation engine to maintain. |
✓
Yes. HubSpot workflows only; no parallel automation engine. |
✕
No. Teams run SleekFlow Flow Builder for conversation routing and HubSpot Workflows for CRM automation, with two engines to keep in sync. |
| Meta passthrough billing with no markupHow Meta conversation fees reach the customer. |
✓
Meta bills the customer's own Meta Business Account directly at Meta rates. |
~
SleekFlow's published prices reflect Meta rates with no published per-message markup. SleekFlow also charges a $15 per WhatsApp number per month connection fee on top of Meta delivery.6 |
| Team inbox with omnichannel routingMulti-agent assignment, lifecycle stages, mobile app and AI handoff. |
✕
Not by design. Flowella is WhatsApp-only and uses HubSpot's native Conversations Inbox where supported. |
★
Strong. SleekFlow's own inbox at |
| Channels beyond WhatsAppInstagram DM, Messenger, Telegram, LINE, WeChat, SMS, web chat and more. |
✕
WhatsApp only by design. |
★
Strong. SleekFlow supports WhatsApp, WhatsApp Coexistence, Instagram DM, Facebook Messenger, SMS, MMS, WeChat, LINE, Telegram, email and web live chat. |
| AI agent with knowledge base RAGAI answer generation, knowledge sources and multilingual support. |
✕
Out of scope. Flowella defers to HubSpot Breeze and the customer's own AI stack. |
★
Strong. AgentFlow (launched July 2025) routes between GPT-4o, GPT-4o mini and Gemini on Azure OpenAI infrastructure, with knowledge sources and multilingual support.5 |
| Pricing model for growing teamsFlat app fee vs MAC + per-number connection model. |
✓
Flat tiers. Starter $79/mo, Pro $159/mo. No per-user fee and no Monthly Active Contact gate. |
~
Tiered MAC model. Pro AI $149/mo annual (3 users, from 500 MAC); Premium AI $349/mo annual unlocks API and additional seats. $15 per WhatsApp number per month on top.7 |
| HubSpot Marketplace maturitySignals from the public HubSpot app listing. |
★
Listed December 2025 through HubSpot's Early Build programme. |
~
80+ installs and 1 customer review (5/5 from Sep 2024). SleekFlow's own help docs describe the HubSpot integration as currently in limited access.24 |
SleekFlow is a credible APAC-headquartered conversational AI platform with its own multi-channel inbox, visual Flow Builder and the AgentFlow AI product. Flowella takes the opposite architectural approach: it stays inside HubSpot, with no parallel inbox or workflow engine to maintain.
Built in Reading, UK by Discover Digital, a HubSpot Solutions Partner. Flowella converts HubSpot Forms into WhatsApp Flows and writes answers back as native form submissions.
Founded 2019 in Hong Kong by Henson Tsai and headquartered in Singapore. Approximately US$23.5m raised to June 2025.1
SleekFlow centralises WhatsApp, Instagram, Messenger, SMS and live chat inside its own app at app.sleekflow.io. HubSpot is a connected CRM, not the system of record for the conversation. Flowella is the opposite, by design: the conversation, the form, and the workflow all live inside HubSpot.
If your operation is HubSpot-centred, Flowella keeps WhatsApp native to HubSpot. If your team wants a unified multi-channel inbox with AI agents for WhatsApp, Instagram, Messenger, SMS and Live Chat, SleekFlow is a serious option.
You already use HubSpot Forms and Workflows. You want WhatsApp to capture clean, structured answers that trigger the workflows you've already built.
You have a team that lives in a shared WhatsApp inbox, runs broadcast campaigns, builds rule-based chatbots, and handles Instagram and Messenger too.
You want shared inbox replies and outbound templates from your HubSpot record, and don't need WhatsApp Flows, branching automation, or coexistence with the Business App.4
Four questions HubSpot teams ask when comparing a HubSpot-native WhatsApp layer with a separate conversational AI platform.
Yes, natively. A WhatsApp Flow built from a HubSpot Form returns its submission as a native HubSpot form submission event. Every existing HubSpot workflow that listens for that form fires automatically, including lead rotation, lifecycle changes, deal creation and Slack alerts.
The conversation runs inside SleekFlow's Flow Builder; submissions become SleekFlow flow variables, and SleekFlow can call back to HubSpot via Create HubSpot record or Update HubSpot record Flow Builder actions, or via Zapier/Make. The outcome is reachable, but the trigger is not a HubSpot form submission and you maintain two workflow engines.4
Flowella is a workflow and forms tool, not a replacement for HubSpot's Conversations Inbox. Where the HubSpot-native WhatsApp channel is available, conversations stay on HubSpot's contact timeline as native engagements.
No. SleekFlow operates its own inbox at app.sleekflow.io rather than feeding HubSpot's native Conversations Inbox. That said, SleekFlow is a fully featured shared inbox with assignment, internal notes, tags, mobile app and AI summaries; if a unified messaging inbox is what you need, SleekFlow is genuinely strong here.
No. Flowella supports WhatsApp Coexistence via Meta Embedded Signup, letting the WhatsApp Business App and the WhatsApp Business Platform API run on the same number.
No, the same applies. SleekFlow documents Coexistence at help.sleekflow.io/whatsapp/whatsapp-coexistence, with imports of up to 6 months of chat history. Meta's country and Marketing Message Lite restrictions apply. The downstream agent experience differs: with SleekFlow, agents work in app.sleekflow.io; with Flowella, agents continue inside HubSpot.3
Flowella Pro is a flat US$159 per month for the platform, plus Meta's per-conversation fees billed directly to the customer's Meta account at cost. No per-agent licence fee and no Monthly Active Contact gate. All seven agents work entirely inside HubSpot.
SleekFlow Pro AI at US$149/month (annual) includes 3 users. Additional seats plus API access typically require Premium AI at US$349/month annual (US$399/month monthly), plus a US$15 per WhatsApp number per month connection fee, plus Meta fees. The agents work in app.sleekflow.io, with HubSpot kept in sync.7
Both products publish clear pricing. The difference is the model: Flowella is a flat HubSpot app subscription; SleekFlow is a Monthly Active Contact model with included users, per-number connection fees and a HubSpot integration gated to Pro and above.
$149–$349 / month. MAC-based. Per-number fees.
$15 per WhatsApp number per month connection fee on top of Meta delivery.6
Meta per-message fees charged at Meta's published rates; FX/gateway uplift not separately disclosed.6
Monthly Active Contact (MAC) model: contacts only count when they engage in two-way conversation.
Flowella Pro is $159/month flat, with no per-user charge and Meta delivery billed directly through the customer's own Meta Business Account.
Only the recurring base subscription is shown. Meta delivery is paid on top, and that's where the markup matters.
SleekFlow has strong third-party reviews outside HubSpot. The HubSpot Marketplace listing for SleekFlow showed 80+ installs and a single 5/5 review as of 16 May 2026.
"Ótimo. Completo e prático. … Interface de automações com fluxobot."
“Great. Complete and practical. … Automation interface with flowbot.” (translated from Portuguese)
"The mobile app itself doesn't work at all if you have very bad reception. This has happened many, many times. I've also filed complaints and reports to SleekFlow. They always say they'll look into it, but nothing ever gets fixed."
SleekFlow has a credible third-party reputation on G2, Capterra (4.5 from 4 reviews), TrustRadius and Trustpilot. On the HubSpot Marketplace specifically, the listing showed 80+ installs and 1 customer review as of 16 May 2026.
Exceptional engagement platform that transformed our student conversion with a 160% increase in same-day applications and 90% WhatsApp response rates.
Flowella's parent company Discover Digital is a Reading, UK-based HubSpot Solutions Partner.
Straight answers for HubSpot teams comparing Flowella and SleekFlow.
It is intended to be honest. SleekFlow is a credible, well-funded conversational AI platform. It does many things Flowella does not, including a multi-channel inbox, AI agents and in-chat payments. Flowella does one thing SleekFlow does not, it keeps WhatsApp Flows inside HubSpot as native HubSpot forms and workflow actions. We have cited primary sources for every claim and flagged items that need verification via trial accounts.
No. SleekFlow can build WhatsApp Flows in SleekFlow's own Flow Builder, or send Meta-native WhatsApp Flows on the Enterprise plan, and it can sync contact data with HubSpot. It does not have a one-click import a HubSpot Form, get a WhatsApp Flow button. Flowella does.
In practice, yes — SleekFlow becomes the inbox. Conversations live in app.sleekflow.io, with HubSpot kept in sync via SleekFlow's Flow Builder action nodes. Whether that is good or bad depends on whether you want HubSpot Conversations Inbox to be the single pane of glass for support, or whether you want a richer dedicated messaging inbox with assignment, AI summaries and a mobile app.
No. Both Flowella and SleekFlow support WhatsApp Coexistence via Meta Embedded Signup. Meta's country and Marketing Message Lite restrictions apply.3
Flowella Pro is US$159/month with no per-user fees. SleekFlow Pro AI is US$149/month annual (US$199/month monthly) with three users and a starting allocation of 500 Monthly Active Contacts; HubSpot integration starts at Pro. Beyond three users or for API access, SleekFlow Premium AI at US$349/month annual (US$399/month monthly) is typical. SleekFlow also charges US$15 per WhatsApp number per month. Meta messaging fees are similar across both: SleekFlow does not publish a per-message markup; Flowella passes Meta fees through to the customer's own Meta account directly.7
SleekFlow is SOC 2 Type II certified (announced 5 February 2026) and ISO/IEC 27001:2017 certified (BS EN version, announced July 2023). It operates a UK entity (Companies House 13855447) and a London sales office in Waterloo. We were unable to find a published UK or EU data-residency option — request a DPA from SleekFlow before signing. Flowella's parent Discover Digital is a UK-based HubSpot Solutions Partner; HubSpot data residency options apply.
Three things. First, a serious multi-channel team inbox covering WhatsApp, Instagram, Messenger, SMS, Live Chat, WeChat, LINE and Telegram. Second, AgentFlow, their AI agent product launched July 2025 with multi-LLM routing (GPT-4o, GPT-4o mini, Gemini on Azure OpenAI). Third, structured chat flows with strong branching, save-reply variables, and HubSpot, Salesforce and Shopify data nodes inside their Flow Builder. APAC presence and Click-to-WhatsApp Ads are mature.5
Yes, but you would likely run them on different phone numbers. If SleekFlow already owns your team inbox, Flowella can sit on a separate marketing or lead-gen number that runs HubSpot Form to WhatsApp Flow conversions, with submissions landing in HubSpot natively. Many teams keep customer-care multi-channel inside SleekFlow and lead-gen forms inside HubSpot.
Free 14-day trial. Convert your first HubSpot Form into a WhatsApp Flow and send it from a HubSpot workflow without adding a second inbox or workflow engine.
Founded 2019 in Hong Kong by Henson Tsai (BSc Mathematics with Statistics for Finance, Imperial College London; ex-HSBC and EY; Forbes Asia 30 Under 30 2023 in Enterprise Technology). Series A US$8M led by Tiger Global with Transcend Capital and AEF Greater Bay Area Fund (TechCrunch, 22 June 2022). Series A+ US$7M led by Atinum Investment, announced 21–22 August 2024 (Media OutReach, PR Newswire), bringing total funding to US$15M. Further round in June 2025 brought total to US$23.5M. Now headquartered in Singapore with operations in Hong Kong, Malaysia, Indonesia, Brazil and the UAE. UK entity SleekFlow Technologies Company Limited, Companies House 13855447, registered in New Malden, Surrey since 18 January 2022.
sleekflow.io/news/sleekflow-announces-agentflow · TechCrunch · PR Newswire
Listing Sleekflow – Conversational AI, 80+ installs, rating 5 from 1 review. Single review by Philippi, G. (Automotive & Transport, 51–200 employees) dated 25 September 2024 in Portuguese. Listing categories: Live Chat, Workflow Automation. Languages: Chinese, English, Indonesian, Portuguese. Requires SleekFlow Pro, Premium or Enterprise subscription. Pricing on the listing last updated by SleekFlow 24 November 2025.
ecosystem.hubspot.com/marketplace/apps/sleekflow-sync-468506
SleekFlow supports WhatsApp Coexistence via Meta Embedded Signup, allowing simultaneous use of the WhatsApp Business App and SleekFlow on the same number. Imports up to 6 months of chat history. Country-restricted by Meta; not compatible with WhatsApp Marketing Message Lite API.
SleekFlow's HubSpot integration exposes HubSpot trigger nodes (HubSpot record updated) and HubSpot action nodes (Create HubSpot record, Update HubSpot record, Search HubSpot records) inside SleekFlow's own Flow Builder. No HubSpot-native workflow actions are listed on SleekFlow's HubSpot Marketplace listing. The listing's Shared Data table lists only Contacts and Owners, with no rendered sync-direction arrow. SleekFlow's own help docs describe the HubSpot integration as currently in limited access. Please contact our team to enable this feature for your workspace.
help.sleekflow.io/en_US/hubspot-integration · configuring-hubspot-trigger-nodes / action-nodes
SleekFlow has its own visual no-code Flow Builder for automation (chatbots, routing, lead capture). It also supports Meta-native WhatsApp Flows for Enterprise plan customers only (WhatsApp Flows is currently available as a customized solution for enterprise plan customers). AgentFlow, SleekFlow's AI agent product launched 14 July 2025, is built on a multi-agent architecture with GPT-4o, GPT-4o mini and Gemini model routing on Azure OpenAI.
sleekflow.io/solutions/whatsapp-flow · sleekflow.io/news/sleekflow-announces-agentflow
SleekFlow's published WhatsApp pricing reflects Meta's rates (The prices listed reflect Meta rates, but charges may vary across BSPs due to exchange rates and gateway fees). SleekFlow charges a US$15 per WhatsApp number per month connection fee on top of Meta delivery. This is corroborated by an independent BSP comparison from Respond.io: some BSPs, like SleekFlow, charge extra for each connected WhatsApp number. Specifically, SleekFlow charges US$15 per month per WhatsApp Business phone number. No explicit per-message markup is published by SleekFlow; customers should verify final rates on their first invoice.
sleekflow.io/whatsapp-pricing-calculator · docs.sleekflow.io application-process
SleekFlow Free (US$0), Pro AI (US$149/month annual or US$199/month monthly, 3 users, starts from 500 MAC), Premium AI (US$349/month annual or US$399/month monthly), Enterprise AI (custom). HubSpot integration requires Pro or higher per the Marketplace listing. WhatsApp number connection fee US$15/month. Listing pricing last updated by SleekFlow on 24 November 2025. Flowella Starter US$79/month, Pro US$159/month, no per-user fees, Meta messaging fees pass through directly via the customer's own Meta account.
This page is intended to comply with the UK Code of Non-broadcast Advertising and Direct & Promotional Marketing (CAP Code) and the Business Protection from Misleading Marketing Regulations 2008 (BPMMRs 2008). Comparisons are sourced, dated, like-for-like, and limited to verifiable public information at the time of publication. Where information is incomplete (for example, SleekFlow's HubSpot integration limited access status), this is flagged rather than overstated.