The short version. Consider messages.dev when your team can build the workflow around the line. The published price does not establish the complete operating cost.
What the line buys
The Line plan lists a dedicated number for $99 per month. The platform describes iMessage, RCS and SMS access through an API and TypeScript SDK. A free sandbox lists 50 messages per day and webhooks, which gives an engineer something concrete to evaluate before committing to a production number.
What the business must still supply
An API line is one part of a service. Budget for the application that stores conversations, assigns replies and lets someone resolve a failed send. Do not assume a developer SDK includes the staffed inbox your operators need. Ask for a demonstration of the actual interface your team will use.
The published unlimited wording also needs a denominator. Obtain the allowance for new recipients, simultaneous conversations and bursts, plus any channel-specific fees. A sandbox daily message allowance cannot answer those production questions.
Our buying position
This is a plausible option for a business with an engineering owner and a defined workflow. A team seeking an immediately usable shared inbox should verify that requirement separately. Ask for a sample bill covering your expected number of lines and all three channels, then include your implementation hours in the first-year comparison.
Before signing, record who controls the number, how conversation data can be exported and which support commitment comes with the quoted tier. Custom Enterprise SLAs are listed separately; they should not be assumed on the $99 plan.
Sources & further reading
These provider pages were checked for this edition. Provider statements are not independent verification of performance.