Postb Bridge is a UI scheduler with an API tacked on. PostZen gives developers and agents instant API access for account connection, media upload, and post creation. First 2 accounts free, usage-based after that.
No credit card required
// Simple API key authentication
fetch('https://api.postzen.dev/v1/posts', {
method: 'POST',
headers: {
'Authorization': 'Bearer POSTZEN_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify({
platforms: ['instagram', 'twitter', 'linkedin'],
content: 'Hello world!'
})
})Why Switch?
API included
Available in all plans with no add-on fees.
Free tier
Includes 2 social accounts, unlimited posts, and the full API.
No cross-posting restrictions
You're in control of your publishing targets.
Published rate limits
Get 60-1200 requests per minute by tier.
Dedicated support
Work with a dedicated support team.
Paid API add-on
Costs $5/month on top of the $29-49/month base plan.
No free tier
Access is limited to a 7-day trial.
Cross-posting restricted
Posting to multiple accounts is blocked.
Undocumented rate limits
The listed maximum is 100 posts per hour.
Solo founder operation
There is no dedicated support team.
Feature Comparison
| PostZen | Post Bridge | |
|---|---|---|
| Primary fit | Developers adding publishing in their own app or agent workflow | Solo creators using a dashboard to post content |
| API access | All plans (free included) | $5/mo add-on |
| Free tier | Free up to 2 accounts (then $6/account) | $34/mo ($29+$5) |
| Cross-posting | No restrictions | Blocked same-platform |
| Rate limits | 60-1200/min (published) | 100/hour (system limit) |
| AI content | No | Yes (built-in) |
| Social Ads API | No | No |
At a glance
FAQ
Post Bridge documents API access as a $5 add-on for active subscribers. PostZen centers the product on REST API calls for connect, media, accounts, profiles, and posts.
Post Bridge blocks you from posting the same content to multiple accounts on the same platform. This breaks legitimate use cases like franchise operations or multi-brand portfolios. PostZen has no such restriction - you control what you post where.
Yes. The /v1/posts API accepts multiple platform targets in one request, with custom content per target where needed.
Post Bridge's $29/mo Creator plan requires a $5/mo API add-on = $34/mo just for 1-10 accounts. PostZen is usage-based with API included on every account: free up to 2 accounts, then $6/account (1-10), $3/account (11-100), $1/account (101-2,000), custom pricing for 2,001+. 10 accounts on PostZen: $48/mo. Post Bridge can be cheaper at certain scales, but PostZen gives you a real free tier, no $5 add-on gate and no cross-posting blocks
PostZen's API is simpler than Post Bridge's. Sign up (free), get your instant API key, reconnect your social accounts via OAuth, and update your endpoint URL. Most developers are live in under 30 minutes.
Start for Free