What Is Trengo? A Team Inbox Built Around WhatsApp
By Joris van Huët · Trengo's own site
The short answer: if your customers message you on WhatsApp more than they email and up to 10 people answer them, Trengo's Boost plan is the one to price: €349 a month on monthly billing for 10 users and 500 conversations a month, or €299 a month billed annually (checked on 26 October 2026 on the pricing page). Trengo is a European-owned customer service inbox and an official WhatsApp Business Partner; WhatsApp, email, live chat, social and voice share one view, and AI agents take the repetitive questions (homepage).
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What sets the bill:
- Conversations, not seats. A conversation is any reply inside a 7-day window, and a reply after the window counts again (pricing page). For example, 800 conversations a month on Boost is 500 included plus 3 blocks of 100 at €18, so €349 + €54 = €403 on monthly billing.
- What Meta already charges you. Since 1 October 2026, Meta bills each WhatsApp service message past the first 1,000 per phone number a month, whichever provider you use (WhatsApp pricing change). Meta Business Suite shows your volume today.
- The AI rate, and the number that justifies it. On Autopilot each conversation the AI Agent handles adds €0.30 on monthly billing or €0.25 on yearly (pricing page); the AI Agent dashboard shows the share it resolves alone.
What Trengo does
One shared inbox takes WhatsApp Business through Meta's official API, email, Instagram, Facebook, live chat and voice. The AI Agent answers from your help centre, snippets and Notion, reads images and PDFs customers send, applies labels, assigns conversations and hands over to a person (abilities and limits). AI Journeys builds no-code flows across channels (Journeys explained), and Coexistence lets a number stay on the WhatsApp Business App while the team works it in Trengo (Coexistence).
Who it suits
Ecommerce, hospitality and travel teams of 10 or 20 whose customers message rather than call. Less so a three-person email team, which pays for ten seats.
Plans in euros
Checked on 26 October 2026 on the Trengo pricing page, which also quotes US dollars and pounds:
| Plan | Monthly billing | Billed annually, per month | Users | Conversations |
|---|---|---|---|---|
| Boost | €349 | €299 | 10 | 500 a month, or 6,000 a year |
| Pro | €599 | €499 | 20 | 1,500 a month, or 18,000 a year |
| Enterprise | Custom | Custom | Custom | Custom |
Extra users cost €30 a month on Boost and €50 on Pro, or €25 and €40 on yearly billing, per the same pricing page. On a yearly plan, unused conversations carry over to the next month; on a monthly plan they lapse (conversations article).
The free trial lasts 7 days with no card (trial page). The review period Trengo builds into Supervised Mode lasts 30 days (Supervised Mode), so if you switch it on the first day of the trial, the window closes 30 - 7 = 23 days into the paid plan: the decision to let the AI answer alone is made after the subscription has started.
How it compares
Zendesk. Zendesk prices per agent, $55 a month on Suite Team paid yearly, and bills its AI agents per automated resolution (Zendesk pricing). For example, ten agents on Suite Team come to 10 x $55 = $550 a month before AI. Trengo's price moves with conversation volume, Zendesk's with headcount, and that ratio decides it.
LiveAgent. LiveAgent bills per agent from $19 a month and runs its AI on your own OpenAI, Anthropic or Gemini account with no AI fee of its own (LiveAgent pricing). A small email and chat team pays less there; Trengo's case is a WhatsApp-led team.
Getting started
How to use Trengo connects a WhatsApp number, builds the AI Agent's knowledge and runs it in Supervised Mode before Autopilot. If the real question is why three tools answer the same customer, the stack is the problem rather than the inbox, and a one-week review like the Startup Fixer covers it. It is my own service.
FAQ
Can I keep the WhatsApp Business App?
Yes, through Coexistence, if the number is already active on the app and added to Meta Business Manager. Some app features, such as broadcast lists, can stop working once the number is connected (Coexistence).
Does the AI cost extra while it is supervised?
No. Supervised Mode applies no AI surcharge, and every draft waits for a person to approve it (Supervised Mode).
Are Meta's WhatsApp charges in the plan?
No. They come out of a separate balance, which also pays Trengo's AI surcharges and tops itself up automatically when it runs out (plan and pricing article).