Are GREEN-API and UltraMsg official WhatsApp APIs?

No. Both link a normal WhatsApp number by QR code as a linked device, like WhatsApp Web. GREEN-API also sells a separate product on Meta's official WhatsApp Business Platform, but its main $12 instance is unofficial. Unlimited Messaging works the same way for WhatsApp.

UltraMsg vs GREEN-API: which one is cheaper?

GREEN-API. Its Business plan is $12 a month per instance, against $39 a month at UltraMsg ($390 a year). Both bill each linked number separately and charge nothing per message. GREEN-API also has a free Developer plan; UltraMsg only offers a 3-day free account.

What does the free GREEN-API Developer plan allow?

One Developer instance per account, and that instance can only talk to 3 chats (contacts or groups) and receive notifications from those 3 chats. Some methods have monthly caps, for example 100 number checks a month. It is a sandbox, not a production plan.

What is the best GREEN-API or UltraMsg alternative?

It depends on what is missing. For a cheaper WhatsApp-only instance, GREEN-API already is the low end. For a team inbox and campaigns, look at Wassenger. To host everything yourself, WAHA. If you also need email from your own mailbox, SMS from your own phone or one MCP server for all three, Unlimited Messaging covers that in the same API, with a free plan to try it.

What does an honest UltraMsg review come down to?

On paper: a clear single price ($39 a month), no per-message cost, webhooks, media sending and code samples in many languages. The limits: no free plan beyond 3 days, no documented MCP server, no hosting location stated and WhatsApp as its only channel. Uptime and support quality are not something we can verify from public pages.

Can my number be banned with any of these services?

Yes, with all of them, Unlimited Messaging included. WhatsApp does not endorse unofficial clients. The risk drops sharply when recipients expect your messages, volumes ramp up gradually and you never send cold bulk campaigns.

Where are GREEN-API or UltraMsg better than Unlimited Messaging?

GREEN-API's paid tier is cheaper ($12 against €19 a month), it has SDKs in more languages and an official WABA offer if you need Meta's platform later. UltraMsg has connectors for Pabbly, Pipedream and Integrately that we do not offer. Unlimited Messaging's free plan also adds a footer to every message.

How hard is it to migrate from GREEN-API or UltraMsg?

All three are REST APIs with a token. Moving means linking your number again by QR code, changing the endpoint and key, and pointing your webhook URL at the new service. The Python and TypeScript SDKs cover the send and receive calls.

Comparison

GREEN-API vs UltraMsg vs
Unlimited Messaging.

GREEN-API and UltraMsg are two of the most searched unofficial WhatsApp APIs. Both link a normal number by QR code and bill per instance. Here is what each one costs, what its free option really allows, and where Unlimited Messaging differs, including where it does not win.

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The context

What do GREEN-API and UltraMsg actually sell?

GREEN-API and UltraMsg are unofficial WhatsApp APIs: they connect your existing WhatsApp number as a linked device and expose it over HTTP, without Meta's Business Platform, templates or per-message fees.

GREEN-API is run by Green-API LLC, based in Astana, Kazakhstan. Its pricing page lists a free Developer plan, a Business plan at $12 a month and an Ultra plan at $36 a month, each billed per instance. UltraMsg sells one plan: $39 a month or $390 a year, with a 3-day free account to test.

Unlimited Messaging uses the same linked-device approach for WhatsApp, so the comparison is fair on the basics. The differences are elsewhere: email from your own mailbox and SMS from your own Android phone in the same API request, an MCP server for AI assistants, a permanent free plan and a flat monthly plan instead of a fee per instance.

One thing none of these services can change: WhatsApp does not endorse unofficial clients, Unlimited Messaging included. A number that sends spam or cold bulk messages can be banned whatever the provider. This comparison uses public figures from the official sites, checked in November 2026. Offers move fast, so follow the sources.

On the technical side, Unlimited Messaging ships Python and TypeScript SDKs, an MCP server and an n8n node.

Illustration: a rising bar chart, with the headline “GREEN-API, UltraMsg or Unlimited Messaging?”.

The comparison

GREEN-API vs UltraMsg vs Unlimited Messaging

All three link a normal WhatsApp number by QR code. Line by line, here is where they meet and where they split.

GREEN-API vs UltraMsg vs Unlimited Messaging
	GREEN-APIunofficial	UltraMsgunofficial	Unlimited Messagingunofficial
Paid price	$12/mo per instance (Business), $36 (Ultra)	$39/mo or $390/yr	€19 or €29/mo flat, VAT included
Free option	Developer plan: 1 instance, 3 chats	3-day free account	Permanent free plan (footer on messages)
Per-message fees	None	None	None, unlimited on every plan
Email in the same API	No	No	Yes, from your own mailbox
SMS in the same API	No	No	Yes, from your own Android phone
Other products	Separate Telegram API, official WABA offer	WhatsApp only	WhatsApp, email and SMS in one request
SDKs and code samples	Python, Node.js, PHP, Java, Go, C++, 1C	PHP, Node, Python, Java, .NET, Go, mobile	Official Python & TypeScript
MCP server (AI assistants)	Yes, documented	Not documented	Yes, WhatsApp + email + SMS
No-code	n8n, Make, Zapier	Pabbly, Pipedream, Integrately	n8n node
Hosting location	Not stated	Not stated	EU

Figures from green-api.com and ultramsg.com, checked in November 2026. GREEN-API and UltraMsg show prices in US dollars; Unlimited Messaging prices are in euros, VAT included. On the Unlimited Messaging free plan, messages carry a short footer.

In brief

The unofficial WhatsApp APIs at a glance

GREEN-API
The cheapest paid tier of the group: $12 a month per instance on Business, $36 on Ultra (dedicated servers). SDKs in eight languages, a documented MCP server and a separate official WABA offer. The free Developer plan is a sandbox: one instance, three chats.
GREEN-API
UltraMsg
One simple plan at $39 a month or $390 a year, no per-message cost and no sending limit set by UltraMsg (WhatsApp may still restrict a number). Code samples in many languages and connectors for Pabbly, Pipedream and Integrately. No free plan, a 3-day free account.
UltraMsg
Wassenger
More of a team product than a raw API: shared inbox, campaigns, AI assistant and MCP integration. Plans from €39.90 a month per number with a 7-day trial, and both QR linking and Meta's official Cloud API. Run by a UK company.
Wassenger
WAHA
The self-hosted route: a WhatsApp HTTP API you start with one command on your own server, free and open source, from 1 to 500 sessions. You run, update and monitor it yourself, and its own docs warn that unofficial clients are not totally safe.
WAHA
Unlimited Messaging
WhatsApp from your linked number, email from your own mailbox and SMS from your own Android phone, all through one REST API, official Python and TypeScript SDKs, an n8n node and an MCP server. Free plan to start, flat monthly plans, EU hosting.

Why us

Where Unlimited Messaging differs

Same linked-device base as GREEN-API and UltraMsg. What changes is what sits around WhatsApp. If all you need is the cheapest WhatsApp-only instance, GREEN-API Business costs less.

WhatsApp, email and SMS in one request

One POST /message reaches a contact on WhatsApp, by email from your own mailbox and by SMS from your own phone. GREEN-API and UltraMsg stop at WhatsApp.

One MCP server for three channels

Claude, ChatGPT or Cursor read and send WhatsApp, email and SMS through the same hosted connector, on every plan.

A free plan that does not expire
No 3-day clock. The free plan stays free, with unlimited messages, enough to build and test.
No message counter
Unlimited messages on every plan, and a bill that is the plan price. Sending speed and features change between plans, not volume.
Official SDKs
Typed, maintained Python and TypeScript packages rather than copy-paste samples, plus an n8n node.
EU hosting
Data hosted in the European Union, which neither GREEN-API nor UltraMsg states for its WhatsApp service.

FAQ

Questions about GREEN-API, UltraMsg and Unlimited Messaging

: No. Both link a normal WhatsApp number by QR code as a linked device, like WhatsApp Web. GREEN-API also sells a separate product on Meta's official WhatsApp Business Platform, but its main $12 instance is unofficial. Unlimited Messaging works the same way for WhatsApp.
: GREEN-API. Its Business plan is $12 a month per instance, against $39 a month at UltraMsg ($390 a year). Both bill each linked number separately and charge nothing per message. GREEN-API also has a free Developer plan; UltraMsg only offers a 3-day free account.
: One Developer instance per account, and that instance can only talk to 3 chats (contacts or groups) and receive notifications from those 3 chats. Some methods have monthly caps, for example 100 number checks a month. It is a sandbox, not a production plan.
: It depends on what is missing. For a cheaper WhatsApp-only instance, GREEN-API already is the low end. For a team inbox and campaigns, look at Wassenger. To host everything yourself, WAHA. If you also need email from your own mailbox, SMS from your own phone or one MCP server for all three, Unlimited Messaging covers that in the same API, with a free plan to try it.
: On paper: a clear single price ($39 a month), no per-message cost, webhooks, media sending and code samples in many languages. The limits: no free plan beyond 3 days, no documented MCP server, no hosting location stated and WhatsApp as its only channel. Uptime and support quality are not something we can verify from public pages.
: Yes, with all of them, Unlimited Messaging included. WhatsApp does not endorse unofficial clients. The risk drops sharply when recipients expect your messages, volumes ramp up gradually and you never send cold bulk campaigns.
: GREEN-API's paid tier is cheaper ($12 against €19 a month), it has SDKs in more languages and an official WABA offer if you need Meta's platform later. UltraMsg has connectors for Pabbly, Pipedream and Integrately that we do not offer. Unlimited Messaging's free plan also adds a footer to every message.
: All three are REST APIs with a token. Moving means linking your number again by QR code, changing the endpoint and key, and pointing your webhook URL at the new service. The Python and TypeScript SDKs cover the send and receive calls.

Sources

Sources & references

To check the information in this article for yourself:

Written by

Ilian · Senior Software Engineer

A senior software engineer, he founds and runs several tech companies. He builds products around messaging APIs, automation and AI integration, and shares here what he learns while building.

View LinkedIn profileUpdated November 8, 2026

Try the alternative to GREEN-API and UltraMsg.

Link your WhatsApp number, add your mailbox or Android phone, generate an API key and send your first message, free to start.

Try Unlimited Messaging

GREEN-API vs UltraMsg vsUnlimited Messaging.

What do GREEN-API and UltraMsg actually sell?

GREEN-API vs UltraMsg vs Unlimited Messaging

The unofficial WhatsApp APIs at a glance

GREEN-API

UltraMsg

Wassenger

WAHA

Unlimited Messaging

Where Unlimited Messaging differs

WhatsApp, email and SMS in one request

One MCP server for three channels

A free plan that does not expire

No message counter

Official SDKs

EU hosting

Questions about GREEN-API, UltraMsg and Unlimited Messaging

Sources & references

Try the alternative to GREEN-API and UltraMsg.

GREEN-API vs UltraMsg vs
Unlimited Messaging.