You’re running more than one workflow, or you need automation without a human in the loop.
This is the same page you see inside the free plugin when you click “What Pro adds” – while deciding whether Pro is worth it for your site.
Webhook Engine (free) is a complete, unrestricted tool for one form and one channel that auto-publishes its own posts – separately, it also gives you up to 20 channels for plain display, no form or auto-publish limit involved. Nothing in the free plugin is a crippled trial – every feature works fully, with no watermarks, no time limits, no “upgrade to unlock this button.” Pro exists for one reason: you’re running more than one workflow, or you need your trusted automations to act without a human clicking Publish.
If you have exactly one webhook, one form, and you’re comfortable reviewing every AI-generated draft before it goes live – you may never need Pro. If any of that stops being true, here’s exactly what changes.
Only how many, and how far you can automate.
| Free | Pro | |
|---|---|---|
Named forms ( | 1 | 200 |
Channels (Flow B streams, e.g. | Up to 20 | Up to 20 – same on both tiers |
| Channels with automatic post-creation turned on | 1 | 200 |
| Draft-post creation from a form’s reply (Flow A) | Not available at all | Included, per form |
| Post status when auto-created | Draft only | Draft, Pending review, or Publish immediately |
| Featured images | Existing Media Library item, or a rule’s default image | + Downloaded from an allowed URL, + accepted as inline base64 data from an AI |
Rate limit on public form submissions (Flow A /send only) | 20 requests/minute per visitor IP | 60 requests/minute per visitor IP |
| Everything else (shortcodes, Markdown rendering, conversation/chat mode, Copy & Export on replies, styling, security model) | Full, unrestricted | Same |
Nothing about how well a feature works changes between tiers – only how many, and how far you can automate without a human in the loop.
Subtle differences people most commonly get wrong
These are the details worth five minutes before assuming you’ve “hit the free limit.”
Channels are not the same as post-creation rules, and only one of the two is capped.
You can receive and display data on up to 20 different channels on the free plugin – that number doesn’t change with Pro at all, it’s a fixed safeguard against runaway automation, not a monetization lever. What’s actually limited to one on free is how many of those channels can have automatic post-creation turned on – i.e., how many channels can turn their incoming payloads into real WordPress posts by themselves. The other 19 channels still work completely normally for display via No data yet.
“1 form” doesn’t mean “1 page with a form on it.”
A single named form can be placed with on as many pages as you like – the cap is on how many distinct form configurations (different webhook, fields, design) you define, not how many times or where you use one. Also worth knowing: the global Flow A settings (a plain with no id) is a separate configuration that doesn’t count against your named-form limit at all. In practice, free-tier sites get one global default form plus one named form – two independent configurations, not strictly one – before Pro becomes necessary.
The higher rate limit only applies to Flow A.
It governs the public /send endpoint that a visitor’s browser hits when submitting a form. Flow B’s inbound endpoint (where your automation pushes data to the site) isn’t rate-limited by IP at all – it’s authenticated by your shared secret instead, so your automation’s push frequency is never throttled by this setting on either tier.
Draft-post creation for Flow A isn’t “limited” on free – it doesn’t exist there at all.
Unlike the draft/pending/publish status distinction (which is a real limit on an otherwise-available Flow B feature), turning a form’s webhook reply into a saved post or page is a Pro-only capability from the ground up. On free, Flow A can display a reply on the page; it cannot also save it as a post.
Five things Pro unlocks, and who actually needs each one
1. More than one form, or more than one auto-publishing channel
The free plugin caps you at one named form and one channel with post-creation turned on. That’s genuinely enough for a single “Ask us a question” box paired with a single automated news channel. The moment you want a second, you need Pro, which raises both caps to 200.
Who needs this: anyone running more than one automation against the same site. Very common once a workflow proves itself and a second use case shows up.
2. Publish automatically, not just draft
Every payload or reply that becomes a WordPress post starts as a Draft on the free plugin – always, no exceptions. Pro unlocks Pending review and Publish immediately. (The plugin still warns you, every time you set a channel or form to auto-publish, that anyone holding your webhook secret can then put content live with zero review – Pro removes the technical gate, not the responsibility to keep your secret safe.)
Who needs this: sites running a workflow they’ve already trusted for a while, where reviewing every single draft has become the bottleneck rather than the safeguard.
3. Draft posts from a form’s reply, not just inbound pushes
Webhook Engine has always turned inbound pushes (Flow B) into WordPress posts. Pro extends that same pipeline to outbound forms (Flow A): turn on Draft post creation for any non-chat form, and every reply your webhook sends back is also saved as a WordPress post or page.
Who needs this: anyone using a form as a content-generation front end – e.g. “type a topic, get an AI-written article back” – who wants that article saved as a real, editable post automatically.
4. Images from a URL or generated inline
The free plugin attaches a featured image two ways: an existing Media Library item, or a fixed default image. Pro adds an Image URL (downloaded only from hosts you’ve allowlisted) and inline image data (raw base64 bytes, built for an AI generating an image on the spot).
Who needs this: any workflow where the image isn’t a fixed asset you already uploaded – an AI-generated illustration per article, or a photo fetched from a stock/API service.
5. A higher rate limit on public form submissions
The public /send endpoint is capped at 20 requests per minute per visitor IP on free, 60 on Pro. This is a defensive limit against one visitor (or a bot) hammering your webhook, not a traffic cap on your whole site.
Who needs this: mostly relevant for busy conversation-mode (chat) forms; rarely the deciding factor on its own.
What does not change
No new shortcodes
Pro doesn’t add new shortcodes or change how existing ones behave.
Same security
SSRF protections, secret handling, input sanitization, and escaping are identical in both tiers.
No hosting extras
Pro doesn’t add hosting, uptime, or performance improvements – this is a WordPress plugin, not a service.
Nothing to relearn
Every screen looks the same, just with more room and a couple of extra fields unlocked.
If none of the five items above solve a real problem you have today, free is not a lesser product for you – it’s the right product.
A trial before any charge.
Webhook Engine Pro offers a trial before any charge – see the license screen (Webhook Engine Pro → Manage your license & account, visible once Pro is installed) for current trial length and pricing. Licensing, billing, and account management are handled by Freemius.