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Replai vs Trengo: which is right for your WhatsApp customer service?

By Clement, founder of ReplaiPublished Updated 4 min read

Quick answer

Pick Trengo if a ten-person support team needs email, voice, chat and WhatsApp in one shared inbox: WhatsApp runs on Meta's official API with per-message fees, and setup takes days to weeks. Pick Replai if you run one to five WhatsApp numbers with no support team: it pairs by QR in 30 seconds, from $19 a month with AI included and no message fees, on an unofficial connection.

  • Trengo Boost covers ten users and 500 conversations a month; extra conversations and AI cost more.
  • Trengo's WhatsApp runs on Meta's official API: days to weeks of setup and per-message fees on top.
  • Replai pairs by QR in 30 seconds and costs $19, $49 or $99 a month with AI included.
  • Replai lets any workspace member take over a chat, but has no routing, SLAs or per-agent reporting.

Trengo is the Netherlands-grown multichannel customer-service inbox — WhatsApp, email, voice, chat, all in one team-shaped pane. Replai is a WhatsApp-specific AI built for the way small businesses in SEA actually use WhatsApp Business. Different audiences, different shapes of problem.

This is a comparison from the Replai team. We're being fair to Trengo (it's a solid mid-market product), but we have a perspective.

At a glance

Trengo's WhatsApp channel runs on the WhatsApp Business Platform, which since 1 July 2025 charges per delivered template message (marketing, utility or authentication) and since 1 October 2026 charges for non-template replies inside the 24-hour customer service window too, past the first 1,000 a month per business number (Meta for Developers, 2026). Those fees are billed on top of Trengo's plan and its per-conversation AI charge. Replai pairs to your number as a linked device, so nothing is charged per message.

TrengoReplai
ChannelsWhatsApp, email, voice, chat, socialWhatsApp
WhatsApp setupOfficial API, days to weeksQR pairing, 30 seconds
AIPaid tiers, €0.30 per conversationIncluded on every plan
Per-message feesYesNo
PricingFrom €299/mo, 10 usersFrom $19/mo flat
Built forMid-market support teamsSmall businesses on WhatsApp
Order updates from your own numberNo (official API, dedicated number)Yes, WooCommerce and Shopify
Template approval for order messagesYesNo
Abandoned cart link rebuilds the cartNot statedYes, on any device

What does Trengo do better than Replai?

Multichannel done well. If your customers reach you on email, WhatsApp, live chat, and voice — and you want one shared inbox where the team can hand conversations off — Trengo's UX is genuinely strong. Built for support teams who think in tickets and assignees.

Email + voice + chat are first-class. Most "WhatsApp-first" tools treat email and voice as afterthoughts. Trengo treats all channels as primary. That matters if your B2B inbound is half email.

Official WhatsApp Business API. Meta-approved BSP. Template messages, broadcast to opted-in lists, official green-tick — full WABA compliance.

European support culture & GDPR posture. EU-resident data, GDPR-aligned by default, strong support for European business norms.

What does Replai do better than Trengo?

No Meta application, no waiting. Replai pairs to your WhatsApp Business number as a linked device — the same mechanism as WhatsApp Web. 30 seconds via QR. No Meta business verification form, no BSP onboarding call, no weeks-long approval.

No per-conversation fees. Meta's WABA charges per conversation window, and those fees pass through whatever BSP you're on. Replai's flat pricing avoids that cost surface entirely.

Knowledge-grounded AI by default. Drop in a Google Doc with your catalog or FAQ — Replai answers from it. Trengo's AI HelpMate and AI Journeys work but are designed assuming you've also built out a flow tree and that you're routing AI replies to agents for human-in-the-loop review.

Voice notes and product photos natively. Customer sends a voice note in Bahasa or a product photo asking "this in red?" — Replai handles it in context. On Trengo that's a higher AI tier or external integration.

Single flat price. No per-seat agent licenses, no AI credit packs, no broadcast fee tier. Built for a one-to-five-person business, not a 30-agent support team.

When to pick Trengo

  • You're a mid-market support team needing email + voice + chat + WhatsApp in one inbox
  • You're in Europe and want EU-resident data + GDPR-aligned defaults
  • You need agent routing, SLAs, ticketing workflows
  • You're running broadcast WhatsApp campaigns at scale alongside support
  • You have 5+ agents who need a shared inbox UX

When to pick Replai

  • You're a small business and 80%+ of your customer messages come via WhatsApp
  • You don't want to apply for Meta business verification or sign with a BSP
  • You're in Southeast Asia, the Gulf, or LatAm where multilingual + voice-note handling matters
  • Most of your inbound is repetitive — pricing, availability, hours, stock
  • You'd rather pay one flat fee than per-seat + per-conversation + per-AI-credit
  • You'd rather drop a Google Doc in than build a flow tree

The honest summary

Trengo is a serious multichannel inbox for European mid-market support teams. Replai is a focused WhatsApp AI for SEA, MENA, and LatAm SMBs whose problem isn't "we need one inbox for our 12 agents" — it's "I'm answering the same five questions on my phone at midnight."

If you're a Dutch SaaS with 20 support agents, pick Trengo. If you're a tuition centre or a DTC brand in Kuala Lumpur, pick Replai.

Try Replai free for 7 days — pair your WhatsApp number, drop in your knowledge, see whether it actually saves you time.

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Frequently asked questions

How much does Trengo cost in 2026?

Trengo's Boost plan is €299 a month billed annually or €349 monthly for ten users and 500 conversations a month; Pro is €499 or €599 for twenty users and 1,500 conversations. Extra conversations cost €15 to €18 per 100, AI adds €0.25 to €0.30 per conversation, and WhatsApp runs on the official API so Meta's per-message fees apply.

Is Replai a good Trengo alternative for a small business?

For a business on one to five WhatsApp numbers with no support team, yes: Replai pairs to the WhatsApp number you already have as a linked device, so there is no Meta application and no per-message fee. Plans are $19, $49 or $99 a month with the AI included, and a 7-day trial needs no card. For a team of ten that needs email, voice and a shared inbox, Trengo or Respond.io is the better fit.

Does Replai have a shared team inbox like Trengo?

Replai has a conversations view where any workspace member can read threads, take over a chat from the AI and hand it back, and mark flagged replies. It does not have Trengo's multi-channel routing, SLAs or per-agent reporting. It is built to answer, not to manage a support department.

Which is safer, Trengo's official API or Replai's QR pairing?

Trengo uses Meta's official WhatsApp Business API, which is sanctioned and carries very low restriction risk if you follow template and opt-in rules. Replai's linked-device connection is unofficial and can be restricted if a number behaves like spam, which Replai mitigates with rate limits and warm-up but cannot guarantee.

Sources

  1. WhatsApp Business Platform pricing, Meta for Developers, 2025-07-01
  2. WhatsApp Business crosses 200M MAUs, introduces personalized messages feature, TechCrunch, 2023-06-27

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