Instagram comment auto reply, written by AI in your brand's voice
By HeyMark · Reviewed by Crescente Martinez, CMO and co-founder of HeyMark · Updated
Before turning on Instagram auto replies, gather the questions you receive and the answers your team has already approved. Have the opening hours, links, and policies your brand can share ready, and decide which questions a person should review. That preparation will help you choose the right approach for each comment.
Two kinds of Instagram comment auto reply
Fixed keyword replies. You set the word (“price”, “menu”, “link”) and the text. They’re predictable, spend no credits and come with every plan. They work when you know what people will ask and what you’ll answer, as with Instagram DM automation.
Generative AI replies. This is what people mean by an AI reply to comments: the AI reads each comment and writes a new answer in your brand’s voice, learned from what you’ve already published. It covers what you can’t predict: a question about ingredients, the “do you ship to other cities?”, the compliment that deserves more than “thanks”. Each reply uses 1 credit.
What we recommend is using both: rules for your campaign promises, AI for the everyday conversation.
What a good reply looks like
A bakery gets this comment on its reel: “Can I order the chocolate cake gluten free? My daughter has celiac disease.”
The first one answers the question, gives a concrete detail, doesn’t promise what the bakery can’t guarantee, and offers a next step. The second could sit under any comment on any brand’s post.
To answer like the first one, the AI has to know what your brand knows. It learns the voice from your posts. Details that aren’t in them, like lead times, prices or shipping policies, are worth adding to the brand profile so it doesn’t have to guess.
Approval and handoff to a person
Auto replying doesn’t mean replying without control. In HeyMark:
- You pause the AI in a conversation when you want to answer yourself, and resume it when you’re done.
- What needs a person gets escalated. The conversation goes on the escalation list for human attention, and whoever resolves it decides how it continues.
- From your assistant, nothing goes out without a preview. If you ask Claude or ChatGPT to reply to a comment, it shows you the text and waits for your approval before posting it.
- Moderation is separate. Comments you chose to moderate are hidden or held for review, and deleting one from the platform requires your approval. More in comment moderation.
To see how this fits with the rest of the work, see what an AI agent for social media does.
When not to auto reply
However good an automatic reply is, it makes these worse:
- Complaints. An order that arrived wrong needs someone who can fix it, not a well-written apology.
- Legal or health questions. A wrong answer about an allergen, a treatment or a contract has consequences.
- A crisis. If a post went viral for the wrong reason, every automatic reply adds fuel to the fire.
- Details that change daily. Stock, today’s prices, holiday hours.
In those cases, let the conversation escalate to your team, pause the AI where needed and, if the crisis is big, pause your automations too. Escalations and pauses are handled from the unified social inbox or from your assistant.
Auto reply to comments on Facebook, TikTok, LinkedIn and YouTube
Everything above applies to Instagram. On the other networks, what each rule can do changes.
Your Facebook Page’s comments and messages land in the same inbox as Instagram’s, and you answer them there by hand or with AI in your brand’s voice. Keyword rules work the same way: whoever comments the word gets a public reply and a DM, and whoever sends it by direct message gets an automatic reply. If you were looking for a bot to reply to Facebook comments, the choice is the same as on Instagram: a rule answers what you planned for, and AI answers what you didn’t.
TikTok
Both rules work on TikTok too: the comment rule replies publicly and sends a DM, within what TikTok allows, and the DM rule answers whoever sends you the keyword. What TikTok offers natively, and how each rule is set up, is covered in TikTok auto reply.
YouTube and LinkedIn: keyword public replies
On YouTube and LinkedIn the comment rule posts only the public reply: DMs exist where the network allows them, which is Instagram, Facebook and TikTok. That works for whatever you promise in a video or a post: anyone who comments RECIPE or REGISTER gets the link in the reply. Each rule takes up to 20 keywords and spends no credits. For what doesn’t fit a rule, your assistant in Claude or ChatGPT reads the comments on your videos and posts and drafts replies it posts once you approve them (YouTube MCP server and LinkedIn MCP server).
How many credits it uses
Each AI reply or DM uses 1 credit. Keyword rules use none.
| Plan | AI credits a month | What that covers |
|---|---|---|
| Creator, $12 USD a month | 500 | 500 AI replies, or 400 if you also use 10 Mark turns |
| Company, $30 USD a month | 3,000 | 3,000 AI replies |
| Platform, quoted | 25,000 | Unlimited comment replies |
Each Mark turn uses 10 credits. If you run short, you can turn on extra credits at $0.01 USD each; they’re off by default.
What Metricool, Buffer and Hootsuite do
| Fact | HeyMark | Metricool | Buffer | Hootsuite |
|---|---|---|---|---|
| AI on comments and DMs | Replies to comments and DMs with AI in your brand's voice, with approval and handoff to a person. On every plan | No documented AI replies in the inbox. Its assistant drafts copy with 5 to 35 credits per brand a month | Suggests AI replies that learn your voice (Community). 5 a week on the free plan | AI-suggested smart replies and automated responses in its inbox (Nest), both from Professional |
| Comment-to-DM automation | Included on every plan, no credits spent: keyword public reply and DM on Instagram, Facebook and TikTok (on TikTok, the DM depends on what the platform allows in each country); public reply also on LinkedIn and YouTube | Flows (since September 2026): keyword replies with up to 3 fixed texts, on Instagram and TikTok. Free for a limited time, then a paid add-on | No verified public data | Yes, from Professional and Instagram only: on posts and reels scheduled in Hootsuite, it replies to comments with the keyword and sends a DM with a button and link |
| Comment moderation | Automatic moderation: hides, holds for review or deletes comments, with your approval to delete | The inbox can't hide or delete comments. On TikTok, Flows hides comments with banned words | No verified public data | Hides or deletes Instagram comments and hides Facebook comments manually from Streams. Its inbox automations tag, apply topics, resolve or forward to a CRM, without hiding comments |
Buffer suggests AI replies that learn your voice, 5 a week on its free plan. Hootsuite offers AI-suggested replies and automated responses in its inbox from its Professional plan ($199 USD a month per user billed yearly). Metricool doesn’t document AI replies in its inbox, and Flows, its automation, uses up to 3 fixed texts. HeyMark replies with AI in your brand’s voice, with approval and handoff to a person (all as of September 2026).
Where the others win: Hootsuite if you need social listening or a suite for a large team; Buffer if you want the simplest option and to pay per channel; Metricool if your priority is analytics, a free plan or publishing to more networks.
How to get started
- Connect your Instagram account and any others you use. HeyMark pulls in what you’ve published, and Mark learns your voice from it.
- Add what the AI can’t guess to the brand profile: lead times, prices, policies.
- Turn on AI replies and review the first ones in the inbox.
- Set keyword rules for the fixed promises in your campaigns.
Frequently asked questions
Can you auto reply to Instagram comments?
Yes, with a tool connected to your account. In HeyMark you can use keyword rules, which spend no credits, or replies the AI writes for each comment.
Can I review the AI reply before it's posted?
Yes. If you reply from Claude or ChatGPT, every reply on the platform goes through a preview you approve. In the inbox you can pause the AI in any conversation and write it yourself.
Will AI replies sound like a bot?
They sound like your brand to the extent your posts sound like you, because that's where the voice comes from. If something doesn't fit, you can save the correction to the brand profile.
How much does it cost to reply to comments with AI?
1 credit per reply. Creator includes 500 credits a month for $12 USD, Company 3,000 for $30 USD, and Platform has unlimited comment replies.
Is there a free option?
HeyMark has no free plan, but every plan comes with a 7-day trial. Buffer's free plan suggests 5 AI replies a week (as of September 2026).
Which comments shouldn't an AI answer?
Complaints, legal or health questions and anything in the middle of a crisis. Those conversations are better escalated to a person on your team.
See it on your own accounts.
Connect Instagram, TikTok, Facebook, LinkedIn or YouTube and use HeyMark free for 7 days. Mark answers in your voice, and you approve what goes out.
Keep reading
- Instagram DM automationInstagram DM automation for comments: anyone who comments your keyword gets a public reply and a DM with your link. On every HeyMark plan, no credits spent.
- Comment moderationSocial media comment moderation with AI: spam, insults and outside links get hidden or held for review, and deleting a comment always needs your approval.
- Unified social inboxA unified social media inbox for the comments and DMs on your accounts, with AI replies in your voice, handoff to people and access from Claude or ChatGPT.
- AI agent for social mediaWhat an AI agent for social media does and how it differs from an assistant: it plans, writes in your voice, publishes, replies and reports, with your approval.
- TikTok auto replyTikTok auto reply explained: the built-in auto messages, who gets them, and how to auto reply to comments and DMs by keyword or with AI, within TikTok's rules.