SleekFlow vs Trengo
We give SleekFlow and Trengo the same GPA: 2.2 out of 4.0. They get the same grade on all five counts.
Price, platforms and features side by side. The table says where each price was read and when.
SleekFlow
Shared inbox and AI agents for WhatsApp, social chats, SMS and email
Trengo
Shared inbox for WhatsApp, email and chat with AI agents, in euros
How we grade them
| 2.2GPASleekFlowFair | 2.2GPATrengoFair | |
|---|---|---|
| Value for money | DBroadcasts start on Pro at $109 a month billed yearly for 500 active contacts, and each extra 100 is $20, so messaging 1,000 customers a month comes to $209. That's near the dear end even against its WhatsApp rivals, and the $15 WhatsApp number fee and message charges come on top. | DBoost is €299 a month billed yearly (€349 monthly) for up to 10 users, so a team of five pays about €60 a head, well above the dearest tenth of help desks at $39. On your own, it's the full €299. It does include 6,000 conversations a year and the WhatsApp API. |
| Free plan and trial | CNo free plan, but a 7-day free trial of Pro with 500 monthly active contacts and no credit card. Short, but enough to plug in a channel and look around. | CA 7-day free trial with no card needed, which is short for a tool this costly. There's no free plan after it. |
| Features | BThe whole job across more channels than anything else here: WhatsApp, Instagram, Messenger, TikTok, SMS, Telegram, Viber, email and calls, plus AI agents, broadcasts, a flow builder and contact records with lifecycle stages. | BOne inbox for email, WhatsApp, Instagram, Messenger, TikTok, chat and SMS, the HelpMate AI agent, a help center, multi-step automations and links to stores, CRMs and booking sites. Phone calling is an add-on, but the job is covered. |
| Ease of use | CNo App Store rating on record. Each channel needs connecting, then there are flows and AI agents to build, and an active-contact count to watch. | CNo store rating on record. You connect the WhatsApp Business API and each other channel, then set up AI flows, and the AI Journeys part is still marked as a beta. |
| Platforms and integrations | BWeb, iPhone and Android, with Shopify, Zapier, Make and API access from Pro, and Stripe payment links. HubSpot and Zoho start on Premium and Salesforce on Enterprise, and there's no desktop app, which an A needs. | BIt runs in a browser only, with no app for phones or computers, though you can add it to a phone's home screen. The connections help: Shopify, WooCommerce, Magento, HubSpot, Salesforce, Pipedrive, Booking.com and Airbnb, plus an API. |
| Best for | one inbox for WhatsApp, social, SMS and email | WhatsApp-heavy service teams in Europe |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: SleekFlow and Trengo. How we grade
Where they differ
- SleekFlow starts at $49 per month for up to 3 seats, billed annually ($69 billed monthly). Trengo starts at €299 per month for up to 10 users, billed annually (€349 billed monthly).
- Only SleekFlow lists iOS and Android apps.
- SleekFlow also covers marketing automation and whatsApp messaging.
- Trengo also covers live chat and help center.
At a glance
| SleekFlow | Trengo | |
|---|---|---|
| Pricing | Free trial | Free trial |
| Starts at | $49 per month for up to 3 seats, billed annually ($69 billed monthly) | €299 per month for up to 10 users, billed annually (€349 billed monthly) |
| Free plan | None | None |
| Free trial | 7-day free trial of Pro with 500 monthly active contacts, no credit card required | 7-day free trial, no credit card required |
| Web | ||
| iOS | ||
| Android | ||
| Made by | SleekFlow Technologies Limited | Trengo |
| Price read from | sleekflow.io | trengo.com |
| Checked | Oct 18, 2026 | Oct 17, 2026 |
Who each one suits
SleekFlow
- Retail and service businesses in Asia and Latin America that sell over WhatsApp
- Teams answering WhatsApp, Instagram and email from one inbox
- Companies that want AI agents to qualify leads before a person steps in
Trengo
- European businesses that handle much of their service over WhatsApp
- Hospitality, travel and leisure companies using booking platforms
- Teams of up to 10 or 20 people who want one fixed monthly price
Worth knowing
SleekFlow
- WhatsApp numbers cost $15 a month to host and SMS or VoIP numbers $1, and messages and calls are billed per SleekFlow's rate card on top of the plan.
- Past the plan's allowance, 100 more active contacts are added at $20 each time; extra seats cost $15 on Essential, $25 on Pro and Premium and $29 on Enterprise.
- HubSpot, Zoho, webhooks and role-based access start at Premium; Salesforce is Enterprise only.
- Human chat support in office hours starts at Premium; other plans get AI chat support and email.
Trengo
- Prices are set in euros; the dollar view on the pricing page converts them at a live exchange rate.
- Conversations past the allowance cost €18 per 100 billed monthly (€15 yearly); AI-handled ones add €0.30 each (€0.25 yearly).
- Extra users cost €30 a month on Boost and €50 on Pro (€25 and €40 yearly); broadcasting and phone calling are add-ons.
- There are no native apps: Trengo runs in a browser and can be added to a phone's home screen.
Key features
SleekFlow
- One inbox for chats, email and calls
- WhatsApp, Instagram, Messenger, TikTok, SMS, Telegram, Viber, Gmail and Outlook email and VoIP calls in one inbox, on the web and in the mobile app.
- AI agents
- From Pro, AI agents answer from your knowledge base and hand over to a person. On Premium they can act in other systems, such as updating orders or bookings.
- Broadcast campaigns
- Bulk messages to segments from Pro, sent from the web or the app. Message fees are charged separately by template, country and volume.
- Flow Builder
- No-code automations from Pro, with a cap on active flows that rises by plan; Premium adds HTTP request and webhook steps.
- Contacts and lifecycle stages
- Each conversation links to a contact record with lifecycle stage, owner and purchase history, shown on a kanban board, with custom objects on every plan.
- Sales tools
- WhatsApp catalog, Stripe payment links and Shopify, with Facebook Lead Ads and TikTok Instant Forms for capturing leads from ads.
Trengo
- One inbox for messaging channels
- Email, WhatsApp, Instagram, Facebook Messenger, TikTok, live chat and SMS arrive in one shared inbox with assignment, labels, mentions and internal comments.
- Official WhatsApp Business API
- WhatsApp is built in on every plan, and WhatsApp service conversations are not charged; broadcast campaigns over messaging apps are an add-on.
- HelpMate AI agent
- An AI agent that suggests and sends replies on its own, with an AI surcharge on each conversation it handles and reports on how it resolves questions.
- AI Journeys
- Automations that run conversations and workflows across several steps and channels. The pricing page marks it as a beta whose packaging may change.
- Help center
- A customer help center hosted at help.trengo.com, which can be moved to your own domain.
- Store, booking and CRM links
- Integrations with Shopify, WooCommerce, Magento, HubSpot and Salesforce, and with holiday and booking platforms such as Booking.com and Airbnb.
Plans
SleekFlow
Essential$49
per month for up to 3 seats, billed annually ($69 billed monthly)
Shared inbox with 5 channels, unlimited active contacts, AI co-pilot and simple automations. Rolling out by country and booked through a demo.
Pro$109
per month for up to 500 contacts, billed annually ($139 monthly)
10 users, AI agents, broadcasts, the flow builder, Shopify, Zapier and Make, and API access. Counts monthly active contacts; each extra 100 costs $20.
Premium$279
per month for up to 1,000 contacts, billed annually ($349 monthly)
10 users. Adds HubSpot and Zoho, webhooks, role-based access, multiple workspaces, deeper analytics and 60-day onboarding. Extra contacts $20 per 100.
EnterpriseCustom
Custom contacts and seats, Salesforce, PII masking, chat export, SLAs and a customer success manager.
Trengo
Boost€299
per month for up to 10 users, billed annually (€349 billed monthly)
Unified inbox, WhatsApp Business API, website widget, auto and quick replies; 6,000 conversations a year billed annually, or 500 a month billed monthly.
Pro€499
per month for up to 20 users, billed annually (€599 billed monthly)
Adds API actions in AI flows, custom integrations through the API, enforced 2FA and phone support; 18,000 conversations a year, or 1,500 a month.
EnterpriseCustom
Custom users and conversations, custom-built integrations and channels, a dedicated success manager and full voice integration. Sold through sales.
Ways to pay less
SleekFlow
- Annual discount
Save up to 20% with yearly billing
SleekFlow's pricing page says yearly billing saves up to 20%: Essential is $588 a year against $828 billed monthly, Pro $1,308 against $1,668.
Trengo
- Annual discount
Up to 20% off with annual billing
Trengo's pricing page says annual billing saves up to 20%: Boost is €299 a month billed annually against €349 monthly, and Pro €499 against €599.
