Polymorfa

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WhatsApp API providers

Polymorfa vs Z-API

Z-API sells linked-device WhatsApp instances in Brazil at a fixed monthly price per instance, with a deep API, calls with SIP, and a partner program. Polymorfa adds the official Cloud API route, signed webhooks and idempotent sends, and bills for the days a number is online.

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Choose Z-API if

  • You want a fixed BRL price per instance with unlimited messages.
  • You only need linked-device numbers.
  • You value local Portuguese-language support and its partner volume tiers.

Choose Polymorfa if

  • You need official Cloud API numbers next to linked-device numbers, in one API.
  • You verify webhooks with an HMAC signature and retry sends with idempotency keys.
  • Some of your numbers are offline for days at a time and you do not want to pay for those days.
  • You want a typed SDK, an OpenAPI spec and a CI test environment.
Routes

One contract for both WhatsApp routes.

Z-API and ClickAPI document linked-device numbers. 1MSG, Sent and NotificaMe document the official API. Green API sells both, as separate products with separate docs.

Polymorfa sends and reacts through the same API on both routes, so moving a customer between them does not mean a second integration.

Linked deviceQR or pairing code
Cloud APIOfficial Meta route
One Polymorfa APISame messages, webhooks, SDKs
Your applicationOne integration
Both WhatsApp routes arrive through one contract. Moving a number between routes does not mean rewriting your integration.
Reliability

Retries that cannot send twice.

Send with an Idempotency-Key and Polymorfa replays the original result for 24 hours instead of sending again. Webhooks carry an HMAC-SHA256 signature and retry up to 8 times over about 41 hours.

Among the APIs here, Sent documents both. Green API authenticates webhooks with a static token header rather than a payload signature.

POST …/messages/sendIdempotency-Key: order-1042Sent
Same request, retriedIdempotency-Key: order-1042Replayed
Webhook to your serverX-Webhook-Signature: 3f9a…
A retried send returns the first result instead of sending twice. Every webhook carries a signature your server can verify.
Onboarding

Send your customer one link.

QuickLink is a hosted pairing page. Your customer scans a QR code or types a pairing code, and you watch the link move from opened to connected. The Branded QuickLink add-on removes our watermark.

ACConnect Acme's WhatsAppScan with WhatsApp, or use a pairing code
Opened · Linked · Connectedlink.polymorfa…
Send your customer one hosted link. You watch it move from opened to connected without building a pairing screen.
Number health

See trouble before a number goes down.

BanSafe Health scores each production linked-device number from 0 to 100 with versioned rules, and shows the deductions behind the score. A project rule can slow sending, stop the number, log it out, email you or send a webhook when Health drops.

Health is an estimate, not a guarantee. It never reads message content, and no provider can prevent every WhatsApp restriction.

Number healthIllustrative values, not live data.
86good
  • Connection−6
  • Delivery−8
A project rule can slow sending or stop the number
A versioned, rules-based estimate with its deductions shown, and project rules that act on it. It never reads message content.
Pricing

Billed for online days.

Per-instance plans charge for a whole month. Polymorfa charges for the days a number is online, so numbers that go offline stop costing money.

Green API and Z-API publish lower monthly prices for a number that is online every day. Compare with your own uptime and volume.

One number, one monthIllustrative values
Online days billed
22
Messages metered
0
Polymorfa bills a number for the days it is online. Message volume on that number does not change the platform charge. Meta's own fees still apply to Cloud API numbers.
Side by side

Polymorfa and Z-API, feature by feature.

Hover a feature name for a definition.

Feature
PolymorfaWhatsApp infrastructure API
Z-APILinked-device API, Brazil
Connection routes
YesQR code or pairing code
Yes
BetaMeta Embedded Signup; needs beta access
Not listed
BetaKeep using the WhatsApp Business app
Not listed
Both routes behind one API
Sends and reactionsEdits, deletes, groups and channels are linked-device only
Not listed
Pairing code (no camera)
In QuickLink
Yes
Hosted onboarding link for your customers
QuickLink
Connect modal
Import existing sessions without rescanning
PreviewBaileys sessions; others assisted
From WhatsApp WebVia a browser extension
Messaging
Media, polls, reactions, edits, deletes
YesEdits and deletes on linked device
Yes
Group management
Linked device
Groups and communities
Channels
Linked device
Yes
Status posts
Not listed
Yes
Message templates
YesSubmitted to Meta for review
Not applicable
Scheduled campaigns
Pro numbers
Send queue
24-hour keys
Not listed
Hosted message history
Beta
Media kept 30 days
Media storage
Hosted
Deleted after 30 days
Calls
Incoming call events
11 call events
Yes
Place and answer calls from code
Browser, server, SIP
Paid add-on
Video calls
Linked deviceCloud API calls are one-to-one audio
Via call SDK
SIP trunk to your PBX
Both directions
Yes
Browser calling components
React and web componentPrerelease SDK
Call SDK
Call history
With quality stats
Not listed
Automation and AI
Visual flow builder
WhatsApp Flows formsNot a chatbot builder
Not listed
Hosted serverless functions
Private beta
Not listed
MCP server for AI agents
Hosted, 190 tools
9 tools
n8n, Zapier or Make
n8n, Zapier, Make
n8n, Make, Zapier
Built-in AI replies
Bring your ownConnect any agent over MCP or the API
Not listed
Developer experience
REST API with OpenAPI spec
OpenAPI 3.1
REST and Postman
Official SDKs
TS · Python · Go · PHP · Rust
Call and connector SDKs
Official CLI
Prerelease
Not listed
Signed webhooks with retries
HMAC-SHA256Up to 8 attempts over about 41 hours
Not listed
Streaming event feed
SSE, beta
Not listed
Free test environment
Beta test numbers0 credits
2-day trial
BetaSimulated test numbers
Not listed
Embeddable UI components
Call components
Connect modal
Operations and safety
Number health estimate
0–100, rules-basedProduction linked-device numbers
Not listed
Typing, pacing and presence controls
Standard and ProEvery setting is off until you turn it on
Typing and delays
Per-number proxy
Not offered
Per instance
Customer accounts for SaaS builders
Customers API
Partner API
Branded onboarding
Branded QuickLink$50 a month add-on
Themed connect modal
Team roles and scoped API keys
Roles and scoped keys
Account token, IP allowlist
Audit log
With export
Not listed
Team inbox app
Shared agent inbox
Not offered
Not listed
Built-in CRM or pipeline
Not offered
Tags and notes
Deployment and pricing
Managed cloud
Yes
Yes
Self-hosting
Not offered
Not listed
Source license
Proprietary
Not listed
Pricing model
Per online number-day
Per instance per month
Paid entry price
$0.25 per online dayStandard number; +55 numbers cost 15% less
R$ 99.99 a monthPartner tiers from R$ 89.99
Free tier or trial
1 project, 1 real numberFree team
2-day trial
Region choice
Not selectable
Not listed

Checked against each vendor's public website and documentation on 24 September 2026. “Not listed” means we did not find the capability on those pages. It does not mean the product lacks it. Prices are list prices shown publicly on that date and exclude Meta's fees and taxes unless stated.

Spotted something out of date? Tell us and we will correct it.

Sources

Polymorfa

Z-API

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