What is the best Trengo alternative in 2026?

For omnichannel service on the Business API, Respond.io is the closest substitute with stronger outbound and automation. If WhatsApp is a sales and relationship channel rather than a support queue, and you want your existing number, groups support, unlimited conversations and unlimited teammates at a flat price, Spun is the strongest alternative because it connects by QR code instead of the API.

What happens when you exceed Trengo's conversation limit?

Trengo's plans include annual conversation allowances (6,000 per year on Boost, 18,000 on Pro). Exceeding them means moving to a higher tier or negotiating additional volume, so a growing inbox turns into a pricing conversation. Alternatives like Spun have no conversation caps at all because there is no per-conversation cost to meter.

Which alternative is cheaper than Trengo for a small team?

Almost all of them. AiSensy starts at $45 per month, Zoko at $49.99, WATI at $59 on annual billing, Interakt at roughly Rs 2,799, and Spun at a flat $49 per month for unlimited team members. Trengo's EUR 299 entry price only makes sense if you genuinely need its 10 included seats and service-desk features.

Can I keep my existing WhatsApp number and chat history when leaving Trengo?

With other API platforms, no: the Business API requires a dedicated number and starts empty. With Spun, yes: it links to the number you already use via QR code and your existing chats and groups are available immediately.

Which Trengo alternative supports WhatsApp groups?

None of the Business API platforms can, because the API itself has no group support. Spun fully supports groups, including group monitoring and analytics, because it connects at the same level as your WhatsApp apps.

When should I stay with Trengo?

Stay if you run a genuine customer service operation that needs SLAs, CSAT scoring, routing rules and voice alongside messaging, your team is large enough to use the 10 or 20 included seats, and your conversation volume fits the allowance. It is the most mature service desk in this comparison; the alternatives here mainly win on price, outbound messaging, groups support or working with your existing number.

Comparison

7 Best Trengo Alternatives in 2026

Trengo is a strong European service inbox, but annual conversation caps, add-on broadcasts and a high entry price make it a poor fit for WhatsApp-first sales teams. Here are 7 alternatives compared honestly, with real pricing.

Pricing and features verified against each vendor's site on August 1, 2026

Trengo is a Netherlands-based omnichannel customer service platform, and it is one of the few tools in this category that behaves like a real support desk: SLA-oriented workflows, CSAT measurement, routing rules, voice calls and a GDPR-focused European footprint. If you run a service team, that maturity is genuinely valuable.

The problems start when you look at the meter. Boost costs EUR 299 per month on annual billing (EUR 349 monthly) and includes 10 users and 6,000 conversations per year. Pro is EUR 499 per month annually with 20 users and 18,000 conversations. Six thousand conversations a year is roughly five hundred a month, which a modestly busy WhatsApp inbox burns through quickly. Broadcasts are a paid add-on rather than a core feature, and WhatsApp still runs through the Business API with Meta's per-message fees on top.

This guide compares 7 alternatives: other API-based platforms with different trade-offs (Respond.io, WATI, SleekFlow, Zoko, AiSensy, Interakt) and Spun, which connects to your existing WhatsApp number by QR code with no API, no conversation caps and one flat price.

Why teams look for a Trengo alternative

These are the most common reasons buyers give, and they shape which alternative fits.

Annual conversation caps

Boost includes 6,000 conversations per year, about 500 a month. A growing WhatsApp inbox outgrows that allowance fast, and then you are negotiating an upgrade rather than just working.

High entry price

EUR 299 per month on annual billing is one of the highest starting points in this category. It buys 10 seats, which is great value for a real support team and poor value for a team of three.

Broadcasts cost extra

WhatsApp campaigns are an add-on rather than an included capability. If outbound messaging is part of how you sell, that is a core feature behind a paywall.

Service-desk shape, not sales shape

Trengo is built around tickets, SLAs and CSAT. If your WhatsApp is a sales and relationship channel rather than a support queue, much of the machinery works against how you actually operate.

No WhatsApp groups

The Business API cannot see or manage WhatsApp groups. If communities or client groups are part of your business, Trengo structurally cannot serve them.

You cannot use your existing number and history

The API requires a dedicated number that starts with a clean slate, plus pre-approved templates outside the 24-hour window. The number your customers already message stays behind.

Trengo alternatives at a glance

Feature	Spun	Trengo	Respond.io	WATI	SleekFlow	Zoko	AiSensy	Interakt
Pricing model	Flat, whole team	Plan + conversation caps	Plan + contacts + users	Plan + per user	Per user (min seats)	Plan + conversation fee	Plan + message credits	Plan + markup
Entry price (paid)	$49/mo flat	EUR 299/mo (annual)	$99/mo	$59/mo (annual)	~$149/mo	$49.99/mo	$45/mo	~Rs 2,799/mo
Unlimited team members						Starter only
Needs Business API approval
Per-message Meta fees
Works with your existing number
WhatsApp groups
Message templates required
AI compose / summary / ask-a-chat		AI agent	AI agents	Add-on credits	AI suite	Add-on bots	Add-on	Add-on
Voice note transcription
Speech-to-speech translation
Per-customer team scoping		Teams	Advanced roles	Roles	Roles	Roles	Basic	Roles
Ticketing / SLA engine			Workflows	Basic	Partial
Named CRM integrations	Webhooks + Zapier
Free tier / trial	Free tier + trial	14-day trial	7-day trial	7-day trial	Free tier	7-day trial	Free tier	Free tier (IG)

Prices are the vendors' published entry-level paid plans as listed on their websites on August 1, 2026 (annual billing where noted). API-based platforms also pass through Meta's per-message fees, which vary by country and message category. Always confirm current pricing on each vendor's site.

1.Spun

Our pick

Best for teams that want AI on their existing WhatsApp number, without the Business API

Spun takes a fundamentally different approach from Business API platforms. It connects to the WhatsApp number you already use by scanning a QR code, the same way WhatsApp Web links a device. That means no API approval, no dedicated number, no message templates, no 24-hour window and no per-message fees. Your chat history and your WhatsApp groups come with you.

On top of that connection, Spun layers a genuinely AI-first workspace: AI drafts replies in your tone, summarizes long conversations, answers questions about any chat, auto-labels and triages incoming messages, and can run a knowledge-base chatbot. Voice is a standout: voice notes are transcribed automatically, and Spun can even translate speech to speech so you can talk to customers across languages.

It is built mobile-first, which matters if you actually run your business from your phone. Team sharing is granular: you can give a virtual assistant or teammate access to only their customers' conversations rather than the whole inbox. Broadcasts and scheduling are included, with built-in caution: Spun helps you stay within safe sending limits rather than encouraging mass blasting.

Pricing: Flat $49, $100 or $200 per month for the whole workspace with unlimited team members, and every feature on every plan. Free-forever Spun Chat tier and a free trial. No per-message fees, no per-user fees.

Pros

Works on your existing number and history via QR, no API approval
Full WhatsApp groups support
Flat pricing, unlimited team members
AI compose, summaries, ask-a-chat, auto-labeling, daily briefing
Voice transcription and speech-to-speech translation
Per-customer conversation scoping for VAs and teams
Mobile-first apps

Cons

No ticketing / SLA engine (triage is AI-driven instead)
Fewer named CRM integrations (webhooks and Zapier instead)
Not designed for official-API use cases like green-tick verified mass notifications

Best for: Small businesses, virtual assistants and teams that live in WhatsApp, use groups, and want AI leverage at a predictable flat price.

Try Spun free

2.Respond.io

Best omnichannel platform for mid-market teams on the Business API

Respond.io is one of the most polished omnichannel platforms on the API lane. It unifies WhatsApp, Instagram, Facebook, TikTok and more into one AI-powered inbox, with strong workflow automation, AI agents and deep reporting.

The trade-off is cost structure: you pay for the plan, for user seats and for Monthly Active Contacts. Growth at $199/mo includes 1,000 active contacts; beyond that you pay $12 per extra 100. For high-volume teams this adds up quickly, and Meta's per-message fees still apply on top.

Pricing: Starter $99/mo, Growth $199/mo, Advanced $349/mo (about 20% less on annual billing). Billed by user seats plus Monthly Active Contacts, with Meta message fees on top. 7-day trial.

Pros

Excellent omnichannel inbox and automation builder
AI agents for lead qualification and support
Strong analytics and enterprise-grade controls
HubSpot, Salesforce and many native integrations

Cons

Expensive for small teams; contact-based billing is hard to predict
Business API only: templates, 24-hour window, no groups
Overkill if WhatsApp is your only channel

Best for: Mid-market sales and support teams handling high volumes across several messaging channels, with budget to match.

3.WATI

Best-known Business API platform for small businesses

WATI is one of the most popular entry points to the WhatsApp Business API, with a shared team inbox, broadcast campaigns, no-code chatbots and a large integration marketplace including Shopify and Zoho.

The trade-offs are cost structure and seat limits: the Growth plan is hard-capped at 3 users, extra seats on higher tiers cost $24 to $69 per user, AI features are credit-based add-ons, and Meta's per-message fees apply on top of every plan.

Pricing: Growth $59/mo, Pro $119/mo, Business $279/mo on annual billing ($69 / $149 / $349 monthly). Extra users $24/mo (Pro) or $69/mo (Business). Meta message fees on top. 7-day trial.

Pros

Mature product with a large integration marketplace
Strong broadcast and chatbot tooling
Well-documented, big user community

Cons

Growth plan capped at 3 users with no way to add more
Per-user fees stack quickly on growing teams
API limits: templates, 24-hour window, no groups, dedicated number

Best for: Small businesses that need the official API with a proven, template-driven broadcast workflow.

4.SleekFlow

Best for commerce-focused teams in Asia on the Business API

SleekFlow is an omnichannel social commerce platform popular in Hong Kong, Singapore and Southeast Asia. It combines a shared inbox with flow automation, payment links and catalog features, and it ships a capable AI suite.

Pricing is per user with minimum seat counts, and WhatsApp costs extra: a hosted number is $15/mo and every template message is billed at Meta's rates. Like all API platforms, it cannot touch WhatsApp groups or your existing personal-number history.

Pricing: Paid WhatsApp API plans start around $149/mo; the popular Premium tier is about $349/mo billed yearly, with per-user minimums. Free tier available. Meta message fees and $15/mo per hosted number on top.

Pros

Strong commerce features: catalogs, payment links, Shopify integration
Omnichannel: WhatsApp, Instagram, WeChat, LINE and more
Free tier to test core features

Cons

Per-user pricing with minimum seats gets expensive
WhatsApp number hosting and message fees are extra
Business API limits: templates, no groups, dedicated number

Best for: E-commerce teams in Asia that want chat-to-checkout flows across several social channels.

5.Zoko

Best for Shopify D2C brands on the Business API

Zoko is built specifically around Shopify. It syncs your catalog to WhatsApp, broadcasts to Shopify customer segments, ships pre-built cart-recovery flows, and unusually for the API lane the Starter plan comes with unlimited agents and no per-seat fees.

The pricing is layered though. Starter adds a Zoko platform fee of $0.015 per conversation on top of Meta's rates; you need the $79.99 Plus plan to remove that markup, and Plus caps you at 5 agents with extra seats at $15 each. Instagram, custom flows and AI bots are all separately priced add-ons, and there is no free plan.

Pricing: Starter $49.99/mo plus $0.015 per conversation; Plus $79.99/mo (5,000 conversations with no Zoko markup, then $0.00199 each) with 5 agents and $15 per extra agent; higher tiers $139.99 and $499.99/mo. Instagram $9.99/mo, custom flows $5.99 each, AI bots from $24.99/mo per bot. Meta message fees on top. 7-day trial, no free plan.

Pros

Deepest Shopify integration of any platform here
Unlimited agents on the Starter plan
No Zoko markup on Meta rates from the Plus plan up
Pre-built cart recovery and commerce flows

Cons

Starter adds a per-conversation platform fee on top of Meta rates
AI bots, Instagram and custom flows are all paid add-ons
Agent caps and $15 per extra seat above Starter
API limits: templates, no groups, dedicated number

Best for: Shopify D2C brands that want WhatsApp catalogs, cart recovery and campaigns wired directly to store data.

6.AiSensy

Best budget Business API option, especially in India

AiSensy is a WhatsApp-only marketing platform with one of the lowest entry prices on the API lane and a genuinely free forever tier for basic use. It is an official Meta BSP and is very popular in India.

Note the dual pricing: the same Basic plan is Rs 1,500/mo on the Indian pricing page but $45/mo on the USD page. AI capabilities and chatbot flows are paid add-ons, and the platform is squarely aimed at broadcast marketing, which brings template costs and compliance discipline with it.

Pricing: Basic $45/mo, Pro $99/mo on the USD page (Rs 1,500 / Rs 3,200 in India, roughly 10% less on annual billing). Free-forever tier. Prepaid Meta message credits on top; AI and chatbot flows are add-ons.

Pros

Very low entry price and a free tier
Purpose-built for WhatsApp campaign marketing
Official Meta BSP with CTWA ad tooling

Cons

WhatsApp-only, no omnichannel inbox
AI and flow builder are paid add-ons
Marketing-heavy usage means high template message bills

Best for: Budget-conscious marketers, especially in India, who mainly need broadcasts and simple automation.

7.Interakt

Best for Indian D2C and Shopify sellers

Interakt, backed by Jio Haptik, targets Indian direct-to-consumer brands. It bundles WhatsApp catalogs, native payments, Shopify integration and campaign tools, and unusually for the API lane it offers unlimited agent seats on paid plans.

Pricing is India-first (roughly Rs 2,799 to Rs 3,799 per month plus tax) and there is a per-message markup on Meta's marketing rates on non-enterprise plans. AI agents are a separately priced add-on.

Pricing: Free Starter tier (Instagram only); Growth ~Rs 2,799/mo and Advanced ~Rs 3,799/mo plus taxes (about 20% less annually). Meta fees plus a per-message markup on top; AI agents are a paid add-on.

Pros

Unlimited agent seats on paid plans
Strong commerce stack: catalogs, payments, Shopify
Backed by Jio Haptik, well established in India

Cons

India-centric; less suited to US or EU buyers
Per-message markup on top of Meta rates
API limits: templates, no groups, dedicated number

Best for: Indian D2C brands selling through WhatsApp catalogs and Shopify.

FAQ

Trengo alternatives: frequently asked questions

Try Spun on your existing WhatsApp number

Scan a QR code, keep your number and chat history, and get an AI-powered shared inbox for your whole team at one flat price. No Business API approval, no per-message fees, no templates.

Start your free trial

Which Trengo alternative should you pick?

If you need the official Business API, Respond.io is the closest omnichannel replacement with far better outbound tooling, SleekFlow and Zoko are the commerce picks, and WATI, AiSensy or Interakt cost dramatically less if broadcasts matter more than SLAs. All of them inherit the API's limits: templates, the 24-hour window, per-message fees and no WhatsApp groups.

If what you actually want is your team and AI working inside the WhatsApp you already use, with your groups, your history, no conversation caps and one flat price, that is exactly what Spun was built for.

Start your free Spun trial

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