Best flat-pricing & unlimited-account posting APIs (2026).
Most posting tools bill per profile or per channel — the bill grows with every brand you win. These three don’t, once you’re past the free tier. And flat isn’t automatically the cheapest choice, so the honest caveat is here too.
Three posting tools offer unlimited connected accounts on a flat monthly plan: Publishly (from $29/mo Starter), bundle.social ($100/mo PRO), and Hootsuite (Professional, $199/mo). Flat pricing pays off once the roster grows — at very small scale, per-account pricing can still be cheaper: 3 channels on Buffer’s published monthly $12/channel rate cost $36/mo.
The three flat-rate options.
All three publish an unlimited-accounts tier — the difference is where that tier starts and what the free tier covers first.
Publishly
Publishly’s paid plans are sized by monthly post volume, not account count — connected accounts are unlimited from the $29/mo Starter plan up. There’s no point where adding another brand or client changes the bill.
bundle.social
bundle.social’s paid tiers start at PRO for $100/mo with unlimited accounts; its free tier is capped at 3 accounts and 20 posts/mo. It’s a straightforward flat-rate option once you’re past the free tier’s limits.
Hootsuite
Hootsuite’s Professional plan is $199/mo with unlimited accounts, sitting above its entry tier, which is capped at 10 social accounts. It’s an established enterprise suite with a broader feature set than a posting API alone.
Side by side.
| Feature | Publishly | bundle.social | Hootsuite |
|---|---|---|---|
| Pricing model | Flat plans sized by post volume | Flat monthly tiers, unlimited accounts from PRO up | Flat monthly tiers, unlimited accounts from Professional up |
| Cost at 100 accounts | $99/mo Growth (unlimited accounts, 15k posts) — same price at 5 or 500 accounts | $100/mo PRO (unlimited accounts) — same price regardless of account count | $199/mo Professional (unlimited accounts) — same price regardless of account count |
| Free tier | $0 Free — 5 accounts, 50 posts/mo | $0 Free — 3 accounts, 20 posts/mo | Not published as unlimited — entry paid tier is $99/mo for 10 accounts |
| Unlimited-account tier starts at | Starter, $29/mo | PRO, $100/mo | Professional, $199/mo |
Competitor pricing & features last checked: 2026-08-11
Flat isn’t always cheapest.
An honest roundup has to say this part too: flat pricing is a bet that your roster keeps growing. At tiny scale, a per-account plan can still win.
At Buffer’s published monthly Team rate of $12 per channel, 3 channels cost $36/mo. Annual billing lowers that to $30 — cheaper than some flat plans on this page. The flat-rate advantage shows up once the account count passes what a per-account plan’s free or entry tier covers.
No account math, ever.
Plans sized by how much you post — the same price whether you’re running 5 accounts or 500.