Builders Program

Build with us for a whole month. Unlimited usage and add-ons, weekly calls and your own Slack channel.

Learn more
Polymorfa
Open Console

Polymorfa vs Sent

Sent needs a number that no other WhatsApp Business account holds, and that includes the WhatsApp Business app.

Sent connects only numbers that are not held by another WhatsApp Business Account, and it counts the WhatsApp Business app among them.1 Polymorfa connects those numbers as linked devices, adds groups, channels and calls, and charges per online number-day, not per person reached.2,3

Start freeMigrate with us
One linked-device number on Polymorfa
Per message
$0
Per online day
$0.25
Linked devices and the official Cloud API, behind one API.4
2 routes
Per message. A number costs credits only for the days it is online.3
$0
To place and answer calls: in the browser, in server code with the raw audio, and on your PBX over SIP.5,6
3 ways
In the hosted MCP server, for agents that run WhatsApp.7
195 tools

Three reasons teams move from Sent

  1. 01

    Linked-device numbers, groups and channels

    Polymorfa connects linked-device numbers by QR or pairing code, and Cloud API numbers through Embedded Signup in beta.2 Linked-device numbers also create and manage groups and post to channels.8,9

    Sent: Sent connects WhatsApp through Meta's signup in its dashboard and needs a number that no other WhatsApp Business Account holds.1

  2. 02

    WhatsApp calls

    Polymorfa places and answers calls in a browser, in server code that reads and writes the audio, or on your own PBX through a SIP trunk. Linked-device numbers also take video and group calls.5,6

    Sent: Sent's documentation does not cover WhatsApp calls.10

  3. 03

    A number-day meter that ignores contact count

    Polymorfa charges a linked-device number 25 credits, or $0.25, for each UTC day it is online: $7.50 for a full 30-day month. Message and contact volume do not change that charge, and a disconnected day costs nothing.3,11

    Sent: Sent bills $0.015 for each person you message in a month, so the bill follows your audience.12

One credit pool. Only the days a number is online.

One credit balance pays for every number your team runs, and a number costs credits only for the UTC days it is online.3 The monthly bonus is part of the price: buy 100,000 credits in a month and you get 250,000.13

Bonus credits on the whole month's purchase, every month

+10%
from 10,000 credits
+25%
from 20,000 credits
+75%
from 50,000 credits
+150%
from 100,000 credits

What Polymorfa gives you that Sent does not

Polymorfa and Sent
FeaturePolymorfaSent
Linked-device numbersYes2Not documented
Group managementLinked device8Not documented
ChannelsLinked device9Not documented
Place and answer calls from codeBrowser, server, SIP5Not documented
SIP trunk to your PBXBoth directions6Not documented
Pricing modelPer online number-day11Per contact messaged each month12
Paid entry price$0.25 per online day11$0.015 per contact12

Move from Sent in an afternoon

  1. 01

    Create a project and a token

    Sign up, create a project and generate an API key or project token in the Console.

  2. 02

    Connect your numbers

    Send each customer a QuickLink. Linked-device numbers pair by QR or pairing code; Cloud API numbers use Embedded Signup, which is in beta.2

  3. 03

    Keep your idempotency keys

    Polymorfa sends accept an Idempotency-Key with a 24-hour window, the same window Sent uses.14,15

Questions

Can I keep SMS on Sent and move WhatsApp to Polymorfa?

Yes. Polymorfa carries WhatsApp traffic only, and its sends take the same 24-hour Idempotency-Key window your code already uses.14,15

Can I test without a real number?

Sent's sandbox mode validates requests and returns simulated responses.16 Polymorfa's test numbers are simulated WhatsApp numbers at 0 credits, in beta.17

Leave the WhatsApp infrastructure to us.

Start free

Also compare: Z-API, Green API, 1MSG

Updated . Other companies' pages checked on 24 September 2026.

  1. Sent, Connect WhatsApp
  2. Polymorfa, QuickLink
  3. Polymorfa, Usage and credits
  4. Polymorfa, Graph API
  5. Polymorfa, Calls
  6. Polymorfa, SIP trunks
  7. Polymorfa, MCP server
  8. Polymorfa, Groups and chats
  9. Polymorfa, Channels
  10. Sent, Documentation index
  11. Polymorfa, Pricing
  12. Sent, Pricing
  13. Polymorfa, Billing
  14. Polymorfa, Messaging overview
  15. Sent, Idempotency
  16. Sent, Test mode
  17. Polymorfa, Test numbers