wacrm vs Trengo: an honest open-source alternative comparison

Trengo is a well-built omnichannel customer-service platform — one shared inbox for WhatsApp, email, live chat, voice, SMS, and social. It's genuinely good at what it does. So why do teams look for a Trengo alternative? Usually because they're paying for a 10-channel service desk when they only use WhatsApp, the flat plans start around €299/month, API access is locked to the top tier, or they want to own their data and code instead of renting a hosted seat.

wacrm answers those — it's a free, open-source, self-hosted WhatsApp CRM with a free public API. But Trengo wins some rows outright, and this comparison is written to help you choose, not to crown a universal winner. Here's the honest version.

TL;DR — which should you pick?

• Pick wacrm if WhatsApp is your channel, you want no per-seat or flat-plan bill, a free API for integrations, and you value owning your data and code (MIT, self-hosted). Best for lean teams, WhatsApp-first businesses, and agencies who rebrand per client.
• Pick Trengo if you need a true omnichannel service desk — email, voice, live chat, SMS, and social alongside WhatsApp — as a fully managed product with support, and the flat pricing fits your team size.

wacrm vs Trengo at a glance

	wacrm	Trengo
Pricing model	Free (MIT); pay only hosting + Meta API	Flat bundled plans + extra seats
Indicative cost	$0 software, no per-seat	~€299/mo (Boost) · ~€499/mo (Pro)
Hosting	Self-hosted (your infra)	Vendor cloud
Data ownership	You (your Supabase project)	Trengo cloud
Source code	Open source (MIT)	Proprietary
Channels	WhatsApp (focused)	10+ (email, voice, SMS, social, chat…)
Shared inbox	Yes	Yes
Public API	Yes — included free	Pro plan only (~€499/mo)
Automations	Conditional branches + wait steps	Flowbot (limited conditional logic)
Broadcasts	Yes	Yes
Customisation	Full — fork and edit the code	Config + integrations
Managed support / voice	Community / self-run	Yes (incl. calling)

Pricing and tier limits change often — check Trengo's current plans before you commit. Meta's WhatsApp Business API messaging cost applies to both and is billed by Meta, not the CRM.

Comparing sales-first CRMs too? See our wacrm vs Kommo comparison.

Why teams look for a Trengo alternative

You pay for omnichannel even if you only use WhatsApp. Trengo's value is breadth — 10+ channels in one inbox. If your customers reach you on WhatsApp and that's it, a flat plan starting around €299/month buys a lot of surface area you won't touch.

API access is behind the top tier. On Trengo, connecting the inbox to your own scripts, storefront, or dashboard requires the Pro plan (around €499/month). For a team whose main goal is programmatic integration, that's a steep floor.

Your data lives on their cloud. As with any hosted platform, your contacts and conversation history sit on the vendor's infrastructure under their terms — a dealbreaker for teams that want portability or self-hosting.

Automation depth. Trengo's flowbot builder is capable for routing but is frequently described as light on conditional logic. Teams that want branching, keyword routing, and wait steps sometimes outgrow it.

wacrm vs Trengo, feature by feature

Pricing and commitment

wacrm is MIT-licensed: no license fee, no per-seat charge, no flat-plan floor. You pay for hosting (modest — it runs comfortably on Hostinger Managed Node.js Hosting) and Meta's API messaging, which is identical on Trengo. Trengo's strength here is a fully managed product with zero ops; its cost is a flat plan from ~€299/month plus per-seat and per-AI-conversation extras.

Channels

This is Trengo's clearest win. It unifies email, live chat, voice/calling, WhatsApp, SMS, Facebook Messenger, Instagram, Telegram, and more in one inbox — a real omnichannel service desk. wacrm is WhatsApp-focused: it does WhatsApp thoroughly (shared inbox, templates, reactions, quote-replies) but does not pull in other channels. If multichannel is a hard requirement, Trengo fits better.

API and integrations

wacrm ships a free public API — scoped API keys and REST endpoints for messages, contacts, conversations, and broadcasts, plus outbound webhooks — on the self-hosted app at no extra cost (see the public API docs). Trengo puts API access on its Pro tier (~€499/month). If you plan to integrate the CRM with your own systems, this is the single biggest cost difference between them.

Automations

Both offer no-code automations. wacrm's automations include conditional branches, keyword triggers, and wait steps for human-time delays. Trengo's flowbot handles routing but is lighter on branching logic. For deep, event-driven WhatsApp flows, wacrm gives you more without a tier upgrade.

Data ownership and customisation

wacrm stores everything in your own Supabase project, so there's no lock-in and you can export anytime — and because it's open source, you can fork it, change how anything works, and ship it under your own brand. The trade-off is that you run it: a one-time deploy and occasional updates. Trengo removes that operational burden by hosting it for you, inside a closed product.

Where Trengo is still the better choice

An honest comparison names where the competitor wins:

• You need true omnichannel — email, voice/calling, SMS, live chat, and social in one inbox. wacrm doesn't do this.
• You want a managed service desk — no deploy, no updates, with support and built-in telephony.
• Customer service is your primary use case and you value Trengo's collaboration and routing tooling at scale.
• Flat pricing suits your team — for a larger support team, a bundled plan can be simpler to reason about than running your own infrastructure.

If those describe you, Trengo is a sound choice. wacrm is for the team that wants WhatsApp done well, with a free API, no flat-plan floor, on infrastructure and code they control.

Migrating from Trengo to wacrm

If you decide to switch, the path is short:

1. Export your contacts from Trengo as a CSV.
2. Fork and deploy wacrm — see Getting started and Deploy on Hostinger.
3. Import the CSV into wacrm's contact hub.
4. Connect your WhatsApp Business API number and set up your pipeline stages — a few minutes each.

The honest limit is the same as any cross-system move: historical conversation transcripts don't transfer automatically. You carry your contacts and start fresh on threads — a one-time cost most teams accept to drop the flat plan, get a free API, and own their data.