ReplyZen supports Facebook, Instagram, and TikTok, but each platform exposes a slightly different set of capabilities. This page is a quick reference so you know what to expect before you configure your agents or try a feature.
TL;DR — the differences in 30 seconds
- Facebook is the most fully featured: every reply, moderation, and automation feature works, and it's the only platform where appended links are clickable.
- Instagram matches Facebook except for two things imposed by Meta's API: you can't like comments and you can't edit a reply after it's published.
- TikTok is supported but is the most constrained: replies are capped at 150 characters, @mentions are stripped, you can hide other people's comments but not delete them, replies can't be edited after publishing, and DM automations are not available.
- Links in replies only render as clickable on Facebook. Instagram and TikTok display URLs as plain text, Use Include Links on all three platforms; Instagram and TikTok have separate default-on Avoid links restrictions.
- New comments arrive instantly on Facebook and Instagram, and within a few minutes on TikTok.
- Auto-hide comments with attachments is Facebook-only. Auto-like high-quality comments works on Facebook and TikTok (not Instagram, which doesn't allow liking).
The full breakdown follows.
Legend:
- ✅ Fully supported
- ⚠️ Supported with a caveat (see the note)
- ❌ Not supported
Replying to comments
| Capability | TikTok | ||
|---|---|---|---|
| AI-generated replies | ✅ | ✅ | ✅ |
| Reply length | No practical limit | No practical limit | ⚠️ 150 characters max |
| Include a link in replies | ✅ | ✅ With restriction off | ✅ With restriction off; reply limit applies |
| Hide / unhide a comment | ✅ | ✅ | ✅ |
| Delete someone else's comment | ✅ | ✅ | ❌ Hide-only |
| Like a comment | ✅ | ❌ | ✅ |
| Auto-like high-quality comments | ✅ | ❌ | ✅ |
| Edit a reply after it's published | ✅ | ❌ | ❌ |
| @mention users in replies | ✅ | ✅ | ❌ TikTok strips mentions |
What the AI understands about a post
| Capability | TikTok | ||
|---|---|---|---|
| Reads the caption | ✅ | ✅ | ✅ |
| Looks at images in the post | ✅ | ✅ | ✅ |
| Looks at video content | ✅ | ✅ | ⚠️ Full video on organic posts; not available on ads |
| Analyzes the destination page (if the post links to a page) | ✅ | ✅ | ❌ |
Images attached to comments
On Facebook, ReplyZen analyzes up to three supported photos or stickers attached to a comment, including readable text in screenshots. That content helps the agent interpret the comment, apply your moderation instructions, evaluate comment-triggered automations, and write replies. A comment can contain only an image, with no typed text.
This is automatic image understanding. The Facebook-only Hide Comments with Attachments setting separately hides all matching attachments within your moderation scope. See advanced moderation settings.
Videos attached to comments are not analyzed, and unreadable image text remains uncertain. Comment-image support depends on the attachments supplied by the platform; TikTok comment fetching currently provides text without photo attachments.
Ads
| Capability | TikTok | ||
|---|---|---|---|
| AI replies to comments on ads | ✅ | ✅ | ✅ |
| AI moderates comments on ads | ✅ | ✅ | ✅ |
| Shows ads and organic as separate filters in the inbox | ✅ | ✅ | ⚠️ Best effort |
How quickly new comments are processed
| Platform | Processing delay |
|---|---|
| Instantly | |
| Instantly | |
| TikTok (organic videos) | Within a few minutes |
| TikTok (ads) | Up to a few minutes |
Automations
| Capability | TikTok | ||
|---|---|---|---|
| Public reply automation | ✅ | ✅ | ✅ |
| Direct message automation | ✅ | ✅ | ❌ |
| Combined reply + DM automation | ✅ | ✅ | ❌ |
Moderation
| Capability | TikTok | ||
|---|---|---|---|
| Custom AI moderation rules | ✅ | ✅ | ✅ |
| Spam filter | ✅ | ✅ | ✅ |
| Auto-hide comments with attachments | ✅ | ❌ | ❌ |
Connecting an account
| How connections work | TikTok | ||
|---|---|---|---|
| One login manages multiple pages | ✅ (multiple Facebook pages through one Meta connection) | ✅ (together with connected Facebook pages) | One TikTok account per connection |
| Reconnect if something goes wrong | ✅ | ✅ | ✅ (same Connect TikTok flow, plus reconnect when prompted) |
Frequently noticed differences
"My TikTok reply got cut off." TikTok caps replies at 150 characters including emoji. ReplyZen's reply editor shows a live counter so you can rewrite before publishing.
"I tried to @mention someone in a TikTok reply and it disappeared." TikTok doesn't let third-party apps add mentions to replies, so they're stripped. Facebook and Instagram both support mentions.
"Why can't I like an Instagram comment?" Instagram doesn't offer a way for third-party tools to like comments. Facebook and TikTok do.
"My link in a TikTok reply isn't clickable." Instagram and TikTok display URLs as plain text — only Facebook renders them as clickable links. To allow these URLs, turn off the corresponding Avoid links restriction and configure Include Links. TikTok's reply length limit still applies.
"How accurate is TikTok's Ads vs Organic split?" ReplyZen separates TikTok ads and organic posts when it can, but TikTok doesn't expose a single reliable ad flag. The split is best effort, so some posts may remain unclassified or land in the wrong bucket.
"When will TikTok comments arrive in my inbox?" Usually within a few minutes — noticeably slower than Facebook and Instagram, which deliver them instantly. This is TikTok's platform behavior and the same everywhere.