Unlimited seats, or unlimited surfaces. Sendible bets on the first. Postonus bets on the second.

The real trade-off

Sendible's Core plan does something most of this category does not: unlimited users for one price. $35/mo gets you 6 social profiles and as many team logins as you want. Most competitors — Postonus included — do not meter seats separately, but Sendible is one of the few that makes "unlimited users" an explicit, named part of its pricing rather than an implicit non-restriction.

Set against that: no free plan, a 14-day trial, and — as far as we could confirm — no MCP server, no CLI, and no self-serve API documentation. If any of those three matter to your workflow, Sendible is not where to look.

Team seats: the one place Sendible clearly wins

This is worth stating without hedging. If your bottleneck is headcount rather than account count — a large team that all needs access to one social workspace — Core's unlimited users removes a cost dimension that a lot of tools quietly charge for. Postonus does not charge per seat either, but it also does not build a marketing point around it the way Sendible does. If unlimited logins under one plan is the actual requirement, name it and check Sendible's current terms directly.

Pricing at a glance

Sendible sells one entry tier with no free option; Postonus offers a free workspace plus a lower-priced paid entry point.

	Postonus Hobby	Sendible Core
Price	$12/mo ($115/yr)	$35/mo
Accounts	10	6 profiles
Users	1 workspace, no seat limit	Unlimited
Free tier	Free workspace, no expiry	None — 14-day trial only

Sendible's per-account price is higher, but if the constraint is people rather than profiles, unlimited users changes the math fast — a 15-person team on Sendible's Core still pays $35/mo total, while a tool that charges per seat would multiply that by headcount.

Developer access: an asymmetric comparison

Postonus ships MCP, an npm CLI, and a REST API together, starting on Hobby. For Sendible, none of the three turned up in research: no MCP server, no CLI, and only enterprise SSO and white-label mentions where an API might be — not enough to call it documented. Rather than state "Sendible has no API," which we cannot fully verify, the honest phrasing is: no self-serve API documentation was found.

When Sendible is the better choice

Two concrete cases. A team where the constraint is number of people needing access, not number of connected accounts — Sendible's unlimited users on Core solves that directly and Postonus has no equivalent headline feature. And a workflow that never touches scripting, MCP, or a CLI, where developer access simply is not a factor.

What Postonus does not do

• No unlimited-seats pricing model. Team access is not a named pricing lever the way it is on Sendible's Core plan.
• No confirmed reason to doubt Sendible's API — or to trust it. We are not claiming an advantage here that the research does not support.
• No live publishing on the free workspace. Drafts and content planning are free indefinitely; scheduling or publishing needs a paid plan.

Weigh the two pricing models against your actual shape of team before deciding. A small team of two or three people gets little value from unlimited seats, and would likely find more use in Postonus's wider platform list and its recycle rules. A large team sharing one workspace is exactly the case Sendible's Core plan was built for, and no amount of platform count makes up for per-seat pricing if headcount is what you are optimizing against.