Linq Alternatives with Custom channel providers

6 providers support custom channel providers: plug your own channel or provider into the same API.

Open-source agent framework with managed iMessage

Starting price: $25/month (Pro)
Free plan: Free: shared iMessage lines, up to 10 users (2.0 beta: 25 shared iMessage assignments and $100 credit)

definePlatform plugs any interface into the same Spectrum API

One API for iMessage, WhatsApp and Apple Messages

PartialYour own Twilio account can be added as an SMS channel under the same API.

Global CPaaS for SMS, RCS, WhatsApp and voice

Flex takes custom chat clients and channel types; BYOC plugs your own carrier into Voice

Messages API for SMS, RCS, WhatsApp, Viber and email

Starting price: $0.00860 per US SMS on a long virtual number, plus carrier fees
Free plan: Free credit at signup with no card, and a free Messages API Sandbox capped at 100 messages a month

Conversation API custom events add your own channels (e.g. WeChat) to a conversation

Global CPaaS and Apple Messages for Business provider

Starting price: $0.0075 to $0.0083 per US SMS (indicative)
Free plan: 60-day free trial, no card, up to 100 messages per channel to your verified number

Open Channel plugs any external messaging platform into Conversations and Inbox

CPaaS with 13 messaging channels in one API

PartialChatlayer Webhook channel plugs a custom channel into a bot; Conversation API channels are fixed