For AI replies to ad comments across Facebook, Instagram and TikTok, use Rypl: on every plan it writes and posts replies and hides spam, from $19/mo flat with no comment cap. ReplyZen meters every AI reply ($29/mo for 500) and labels TikTok beta. NapoleonCat and Agorapulse are suites where moderation runs on rules and a person writes or approves the replies. ManyChat builds DM funnels and posts scripted public replies outside an Instagram beta, and BrandBastion is a managed service for enterprise volume.
If you run paid social, your comment section is a revenue channel — and most brands leak it. Someone comments "how much?" on your ad, no one replies for hours, and that lead is gone. It's not a soft problem: in a controlled A/B test at MindValley, adding comment management as the only variable delivered +48% ROAS, +54% conversion rate, and 47% more purchases (details in our Meta ROAS breakdown). Meanwhile 42% of consumers who complain on social media expect a reply within 60 minutes, and unanswered comment sections read as low engagement to the algorithm.
So which tool should you use? We build one of these (Rypl), so treat this as a vendor's comparison. The facts below were checked on each vendor's own site. Here's how the six most relevant tools actually differ.
What separates these tools
Before the list, four questions decide which category you need:
- Public comment replies vs DM funnels vs full suite. Some tools generate a reply in the comments; ManyChat posts a scripted line (AI on Instagram only, in beta) and pulls people into DMs; suites like Agorapulse route comments to a human inbox.
- AI-native vs rule-based. AI tools read the post and generate a contextual reply. Rule-based tools match keywords and fire pre-set responses.
- Platforms. Facebook only, Facebook + Instagram, or Facebook + Instagram + TikTok.
- Pricing model. Flat per tier, per contact, or per social profile/user — this matters far more than the starting price once you scale.
Quick comparison
| Tool | Core job | Platforms (comments) | AI replies | Starts at | Pricing model |
|---|---|---|---|---|---|
| Rypl | AI ad-comment automation | Facebook, Instagram, TikTok | Yes, posted automatically, every plan | $19/mo | Flat per tier, no comment cap |
| ReplyZen | AI comment replies | Facebook, Instagram, TikTok (labelled beta) | Yes | $29/mo | Per AI reply (500 to 10,000/mo) |
| NapoleonCat | Moderation + analytics suite | Facebook, Instagram, +more | Presets; AI drafts a person sends | ~$79/mo; auto-moderation $119 | Per profiles/users |
| Agorapulse | Social-media suite | Facebook, Instagram, +more | None for comments (human inbox) | $79+/user | Per user + profile |
| ManyChat | DM funnels (comment→DM) | IG, Messenger, WhatsApp… | AI in DM flows; public replies scripted except an Instagram beta | Free / $17+ | Per active contact |
| BrandBastion | Enterprise managed moderation | FB, IG, TikTok, YouTube | Yes (managed) | Custom | Enterprise |
A note on pricing models — this matters more than the sticker price. A per-contact tool looks cheap at first and expensive at scale: ManyChat's Business plan covers 7,500 active contacts at $99/mo ($69 billed yearly), then adds $0.025 per extra active contact ($0.018 yearly) — so a month with 20,000 active contacts runs about $294 to $412 on Business, or $139 to $199 on Advanced. Per-user, per-profile suites (Agorapulse, NapoleonCat) multiply with team size and connected channels. Flat-rate tools (Rypl) cost the same whether you process 500 comments or 50,000. Match the model to how you'll actually grow, not to the entry price.
1. Rypl — best for AI ad-comment automation
Rypl is purpose-built for one job and runs it end to end: managing the comments under your ads with AI, across Facebook, Instagram, and TikTok from a single dashboard. It connects through official APIs (Meta Graph API, TikTok Marketing API) via OAuth — no scraping and no browser hacks, which is where unofficial tools pick up their ban risk.
Here's what it actually does with each new comment, in order:
- Reads the context (Pro and up) — the ad creative (image, video, copy), not just keywords — so the reply fits the conversation.
- Replies in your brand voice in under 60 seconds — on public comments and in Messenger / Instagram DMs, automatically in the commenter's own language.
- Spots spam and negativity in about 1.7 seconds on average (RYPL's own measurement) and hides it within seconds, so it doesn't sit under the ad poisoning the thread or scaring off buyers.
- Detects buying intent — flags price, shipping and availability questions, on every plan. From Pro, reply rules decide what happens next: an agent answers, a ready reply goes out, or the comment is skipped and left to a human. In RYPL's own early beta data, ~28% more conversations converted to sales with intent detection on.
- Grounds answers in your knowledge base — upload catalog, pricing and shipping so it says "ships to the UK in 3–5 days," not "check our site."
- Shows its work — every reply and hidden comment sits in one inbox, marked with the agent that handled it, so you can review what went out and compare ROAS in Ads Manager before and after.
Plans are flat-rate, so cost never scales with comment volume. Every plan runs on the latest OpenAI models and upgrades them automatically:
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Simple — $19/mo: 1 account, up to 3 pages, 1 AI agent. Replies to comments and DMs, answers from your knowledge base (website, files and Q&A), reads intent, and hides spam and hate automatically. For solopreneurs.
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Pro — $49/mo: everything in Simple, plus up to 5 accounts, 20 pages, unlimited agents, replies that read the post (image, video and copy), moderation rules in plain words, reply rules that act on intent, thank-you replies to praise and fast lane processing. The tier most advertisers pick.
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Ultra — $89/mo: everything in Pro, plus unlimited accounts and pages, the most powerful AI, conversation memory, a priority lane and priority support. For agencies and high-volume brands.
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Strengths: TikTok ad comments answered on every plan, on the same engine as Facebook and Instagram; AI replies grounded in the post and your knowledge base, posted on their own; intent detection and conversation memory; a separate AI agent per client for agencies; flat pricing with no comment cap.
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Works next to your suite: Rypl is built for comments and DMs, not publishing, scheduling or listening. Teams that need those keep their suite or flow builder and let Rypl answer the comments. 7-day free trial.
Full product detail: Facebook comment moderation tool. See the head-to-heads: Rypl vs ManyChat, vs NapoleonCat, vs Agorapulse. Setting this up on Instagram specifically? Our Instagram ad comment automation guide walks through the permissions, the Reels and DM nuances, and the setup step by step. Still doing it by hand? Start with how to see and reply to comments on Facebook ads and how to hide comments on Facebook ads automatically.
2. ReplyZen: AI replies, metered per reply
ReplyZen is the closest tool to Rypl in approach: AI comment replies and moderation for Facebook and Instagram, with TikTok labelled beta on its homepage. Replies can publish automatically or wait for a person below a confidence threshold.
- Compared with Rypl: every tier caps AI replies per month, from 500 on the $29 plan to 10,000 on the $249 plan, so the month an ad takes off is the month you move up a tier. Rypl has no cap and runs TikTok ads on every plan.
- Pricing: from $29/mo, volume-based; 14-day trial (500 AI replies + 500 moderations). Head-to-head: Rypl vs ReplyZen.
3. NapoleonCat: rules and presets inside a suite
NapoleonCat is a social-media management platform with an Auto-Moderation module: rules that hide or delete comments and fire pre-set replies to FAQs across Facebook, Instagram and more, plus a unified inbox and analytics.
- Compared with Rypl: automated moderation and replies are rules and presets; automatic hiding starts on Expert ($119/mo billed yearly), and the AI Assistant that tags spam and hate is a $29/mo add-on past 100 free Inbox actions a month (pricing, AI Assistant). Its AI Reply Suggestions (beta) only draft replies for a person to approve. Rypl's AI replies post on their own and hiding is on every plan from $19.
- Pricing: from ~$79/mo (annual, 5 profiles / 2 users); Pro ~$89/mo; Expert ~$119/mo; Enterprise from ~$465/mo. See our full Rypl vs NapoleonCat comparison.
4. Agorapulse: a suite with a human inbox
Agorapulse is a social-media management suite: publishing, scheduling, a unified inbox, listening and analytics. Comment management lives inside its inbox, where a person (or saved replies) handles incoming comments and messages.
- Compared with Rypl: no AI replies for comments; its AI reply suggestions are for private messages only, on the Custom plan (Agorapulse help). Ad comments start on Professional, and pricing is per user and per profile. Rypl's AI writes and posts comment replies on every plan, from $19 a month flat.
- Pricing: Standard from $79/user/mo (annual); Professional from $119/user/mo; 30-day trial. The free plan with an inbox ended in July 2026; the free Archie plan doesn't include the inbox. See our Rypl vs Agorapulse comparison.
5. ManyChat: DM funnels, scripted public replies
ManyChat is a chatbot builder for DM automation across Instagram, Messenger, WhatsApp and more. Its "comment automation" fires on a comment (any comment, or only ones matching a keyword you set), posts a pre-written public reply you authored in advance, and sends a DM. Outside Instagram, nothing reads the comment and answers what was actually asked; on Instagram, the beta Manychat AI can answer comments from a knowledge library.
- Compared with Rypl: on Facebook, public replies are scripted lines, not answers to the question asked; AI comment replies are Instagram-only and in beta, and the "AI Step" (Pro plan and up) works inside DM flows. Pricing climbs with active contacts. Rypl answers the actual question in public, on Facebook, Instagram and TikTok, at a flat price. See our Rypl vs ManyChat comparison, or 8 ManyChat alternatives for comment automation.
- Pricing (2026): Free (25 contacts) / Essential $17 / Pro $39 / Business $99 / Advanced $199 a month ($14 / $29 / $69 / $139 billed yearly), scaling by active contacts.
6. BrandBastion: an enterprise managed service
BrandBastion combines AI with a managed service for large brands, moderating and responding to comments across Facebook, Instagram, TikTok and YouTube (it ran the MindValley test cited above).
- Compared with Rypl: custom enterprise pricing and onboarding rather than self-serve. Rypl starts at $19 a month, connects in minutes and has a 7-day free trial.
- Pricing: custom / enterprise.
How to choose
- You want AI to answer and clean ad comments on Facebook, Instagram and TikTok: Rypl.
- You also run DM funnels: keep ManyChat for the DMs and add Rypl for the public comments.
- You already publish and report in a suite (NapoleonCat, Agorapulse): keep it for that and add Rypl for the comments.
The most common winning stack for a growing advertiser is simple: an AI comment tool to keep the public conversation answered and clean, optionally plus a DM-funnel tool for nurture. Whatever you pick, the mistake to avoid is leaving ad comments unanswered — that's the leak that quietly raises your CPMs and lowers your ROAS.
Start a free 7-day Rypl trial — connect a page and watch your comment section change in the first 24 hours.
